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Shuji Suzuki,1 Aya Ikeda,1 Takashi Uemura,1 Kazuhiro Harada,1 Rie Takahashi,1 Jane Huang,1 Tomoko Tsukahara-Kawamura,1 Hiroaki Ozaki,1 Kazuaki Kadonosono,2 Eiichi Uchio1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, Japan; 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, JapanCorrespondence: Eiichi Uchio, Department of Ophthalmology, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan, Fukuoka, 814-0180, Japan, Email euchio@fukuoka-u.ac.jpPurpose: We studied the kinetic phenomenon of an airbag impact on eyes after trabeculectomy using finite element analysis (FEA), a computerized method for predicting how an object reacts to real-world physical effects and showing whether an object will break, to sequentially determine the responses at various airbag deployment velocities.Methods: A human eye model was used in the simulations using the FEA program PAM-GENERISTM (Nihon ESI, Tokyo, Japan). A half-thickness incised scleral flap was created on the limbus and the strength of its adhesion to the outer sclera was set at 30%, 50%, and 100%. The airbag was set to hit the surface of the post-trabeculectomy eye at various velocities in two directions: perpendicular to the corneal center or perpendicular to the scleral flap (30° gaze-down position), at initial velocities of 20, 30, 40, 50, and 60 m/s.Results: When the airbag impacted at 20 m/s or 30 m/s, the strain on the cornea and sclera did not reach the mechanical threshold and globe rupture was not observed. Scleral flap lacerations were observed at 40 m/s or more in any eye position, and scleral rupture extending posteriorly from the scleral flap edge and rupture of the scleral flap resulting from extension of the corneal laceration through limbal damage were observed. Even in the case of 100% scleral flap adhesion strength, scleral flap rupture occurred at 50 m/s impact velocity in the 30° gaze-down position, whereas in eyes with 30% or 50% scleral flap adhesion strength, scleral rupture was observed at an impact velocity of 40 m/s or more in both eye positions.Conclusion: An airbag impact of ≥ 40 m/s might induce scleral flap rupture, indicating that current airbags may induce globe rupture in the eyes after trabeculectomy. The considerable damage caused by an airbag on the eyes of short-stature patients with glaucoma who have undergone trabeculectomy might indicate the necessity of ocular protection to avoid permanent eye damage.Keywords: airbag, trabeculectomy, sclera, flap, rupture, finite element analysis

Ryosuke Izaki,1 Ayaka Kobayashi,1 Hideaki Fujita,1 Kazuhiro Harada,1 Hiroaki Ozaki,1 Kazuaki Kadonosono,2 Eiichi Uchio1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, Japan; 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, JapanCorrespondence: Eiichi Uchio, Department of Ophthalmology, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan, Tel +81 92 801 1011, Fax +81 92 865 4445, Email euchio@fukuoka-u.ac.jpPurpose: We have previously studied clinical and allergological aspects of sick building syndrome (SBS) cases with ocular disorders and found that SBS is suggested to be partially induced by an allergic response. We analyzed the cytokine production profiles of conjunctival and peripheral blood lymphocytes in patients with SBS with ocular manifestations to further evaluate the pathophysiology of SBS from an immunological standpoint.Methods: We obtained conjunctival samples and peripheral blood mononuclear cells (PBMC) from 15 cases of SBS with ocular findings, 49 cases of allergic conjunctival diseases (ACD) (allergic conjunctivitis (AC), atopic keratoconjunctivitis (AKC), and vernal keratoconjunctivitis (VKC)), and normal controls. Frequencies of cytokine-producing T cells were analyzed by flow cytometry based on an intracellular cytokine staining method.Results: Although no significant difference was observed in the percentage of interferon (IFN)-γ-producing CD4+ T cells in PBMC between patients with SBS and controls, the percentage of interleukin (IL)-4-producing PBMC CD4+ T cells in patients with SBS was significantly higher than that in controls. The percentage of IL-4-producing CD4+ T cells in the conjunctiva in patients with SBS was significantly higher than that in controls, whereas it was significantly lower than that in AKC and VKC. A significant correlation was observed between the percentage of IL-4-producing CD4+ T cells in the conjunctiva and clinical score.Conclusion: These results suggest that SBS may be a kind of allergic disorder and that IL-4 plays a role in the development of allergic disorders in SBS ocular lesions.Keywords: sick building syndrome, allergic conjunctival disease, interferon-γ, interleukin-4, lymphocyte

Maiko Maruyama-Inoue, Shimpei Sato, Shin Yamane, Kazuaki Kadonosono Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, JapanCorrespondence: Maiko Maruyama-InoueDepartment of Ophthalmology, Yokohama City University Medical Center, 4-57 Urafune-cho, Minami-ku, Yokohama, Kanagawa 232-0024, JapanTel +81 45 261 5656Fax +81 45 253 8490Email maicoo@urahp.yokohama-cu.ac.jpPurpose: To report the results of 9-year follow-up examinations and predictive factors for visual acuity outcome after intravitreal injection of anti-vascular endothelial growth factor (VEGF) agents to treat retinal angiomatous proliferation (RAP).Methods: We conducted a retrospective observational study of 85 treatment-naïve eyes in 61 patients (21 men, 40 women; age range, 70–95 years; mean age, 84.0 years) treated with intravitreal injections of anti-VEGF agents. All patients received three consecutive monthly injections as an induction treatment. During the maintenance phase, the patients received intravitreal injections as needed or fixed dosing. The primary outcome measures were best-corrected visual acuity (BCVA) during the follow-up period. Furthermore, we investigated potential predictive factors of improvement in visual acuity. The proportion of patients who developed specific complications were also analyzed.Results: The mean BCVA gradually decreased from 0.58 at baseline to 0.70 at 36 months (P = 0.146), 0.82 at 48 months (P = 0.004), and 0.92 at 108 months (P = 0.021). Improvement in visual acuity at the final visits was associated with baseline visual acuity and central foveal thickness. Massive subretinal hemorrhage, fibrotic scars, and macular atrophy developed in 4 (4.7%), 9 (10.6%), and 50 (56.8%) eyes, respectively, at the final visits, and were all significantly associated with final visual acuity (P = 0.013, P < 0.001, and P = 0.001, respectively).Conclusion: Long-term stabilization of vision in patients with RAP, regardless of treatment modality, was difficult to achieve by using intravitreal injections of anti-VEGF agents. Earlier detection and treatment are important to maintain visual acuity in patients with RAP.Keywords: ranibizumab, aflibercept, retinal angiomatous proliferation, age-related macular degeneration, intravitreal injection

Eiichi Uchio,1 Yusuke Saeki,1 Tomoko Tsukahara-Kawamura,1 Kazuaki Kadonosono,2 Hiroaki Ozaki1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, Japan; 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, JapanCorrespondence: Eiichi UchioDepartment of Ophthalmology, Fukuoka University School of Medicine, 7-45-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, JapanTel +81 92 801 1011Fax +81 92 865 4445Email euchio@fukuoka-u.ac.jpPurpose: Fungal keratitis remains an important disorder because of difficulty in its diagnosis, and some patients do not respond to medical treatment using antifungal local and systemic agents. This study was carried out to determine the therapeutic value of air-assisted manual therapeutic deep anterior lamellar keratoplasty (TDALK) in the treatment of fungal keratitis not curable by antifungal chemotherapy.Methods: Seventeen patients (18 eyes) who were referred to Fukuoka University Hospital and treated surgically from January 2006 to April 2018, in whom a diagnosis of fungal keratitis was confirmed by typical clinical findings and microbiological or histological analysis of corneal specimens, and who were poorly responsive to topical and systemic antifungal medication, whereas the lesion had not resulted in corneal perforation, were enrolled in this study and were treated by air-assisted manual TDALK. Clinical outcomes including treatment course, therapeutic success rate, visual acuity outcomes and graft clarity rate were analyzed.Results: The most common pathogen was Fusarium, followed by Candida and Aspergillus. Beneficial therapeutic results (a clear or translucent graft) were achieved in 15 of 18 eyes (83%). There was no recurrence of infection and resulting visual acuity ≤0.15 logarithm of minimal angle of resolution unit was achieved in 15 eyes (83%). Intraoperative microperforation of Descemet’s membrane (DM) was not observed in any patients.Conclusion: Air-assisted manual TDALK can be effective for treating severe fungal keratitis. In addition, air-assisted manual TDALK might be an alternative procedure to big-bubble DALK, because it can provide ambulatory vision and can preserve potentiality of vision with less risk of intraoperative perforation of DM.Keywords: fungal keratitis, lamellar keratoplasty, fusarium, candida, therapeutic keratoplasty

Akira Arakawa,1,2 Maiko Inoue,2 Shimpei Sato,2 Shin Yamane,2 Kazuaki Kadonosono2 1Department of Ophthalmology, St Marianna University School of Medicine, Yokohama City Seibu Hospital, 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Purpose: To evaluate the efficacy of intravitreal aflibercept therapy in treatment-naïve Japanese patients with polypoidal choroidal vasculopathy (PCV) using Early Treatment Diabetic Retinopathy Study (ETDRS) letter scores.Subjects and methods: This study was a prospective, nonrandomized, interventional exploratory clinical trial performed in an institutional setting. Patients with PCV were treated with intravitreal aflibercept 2 mg/0.05 mL every 2 months after 3 initial monthly doses, for 1 year. Visual acuity test using the ETDRS chart and indocyanine green angiography was performed at baseline and at 6 and 12 months after initiating the treatment, in addition to routine examinations performed at each visit. The main outcome measure was the proportion of patients who achieved

Yusuke Saeki,1 Kazuaki Kadonosono,2 Eiichi Uchio1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Purpose: The disease concept of sick building syndrome (SBS) is still unclear. Ocular mucous membrane irritation is one of the major symptoms of SBS. However, the immunological aspects of the ocular complications of SBS are not yet clarified. The clinical and allergological aspects of SBS cases with ocular disorders with special reference to allergic conjunctival diseases (ACD) were analyzed, especially with respect to local immunological features. Methods: Twelve cases of SBS with ocular findings and 49 cases of ACD (allergic conjunctivitis [AC], atopic keratoconjunctivitis [AKC], and vernal keratoconjunctivitis [VKC]) for comparison were evaluated. The clinical findings in SBS and ACD were scored, and tear film breakup time (BUT) was measured. Cytokine (interferon-γ [IFN-γ], interleukin [IL]-2, IL-4, IL-5, IL-6, IL-8, and IL-13) concentrations in tears were analyzed by cytometric bead arrays. Eosinophil count in peripheral blood, total IgE in serum, and multiple allergen simultaneous test (MAST) for antigen-specific IgE were also measured. Results: In SBS, conjunctival lesions were observed in all cases, and corneal abnormalities were found in two-thirds of the cases. Limbal lesions were observed in 2 pediatric cases. Mean serum total IgE level in SBS was significantly higher than that in AC; however, it was significantly lower than that in AKC and VKC. Eosinophil count in peripheral blood and number of positive allergens in MAST were significantly lower in SBS than in AKC and VKC. Significant elevation of tear IL-4 was observed in SBS and ACD. However, in contrast to ACD, elevation of other cytokines in tears was not observed in SBS. Mean tear BUT in SBS was in the normal range. Conclusion: From these results, SBS is thought to be partially induced by an allergic response. However, clinical dissociation of the ocular clinical findings and local immunological features in tear cytokines may suggest that SBS belongs to a different entity from ACD. Keywords: sick building syndrome, allergic conjunctival disease, cytokine, vernal keratoconjunctivitis, IgE

Shimpei Sato,1 Maiko Inoue,2 Shin Yamane,2 Akira Arakawa,2 Mikiro Mori,1 Kazuaki Kadonosono2 1Department of Opthalmology, Toranomon Hospital, Tokyo, Japan; 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Purpose: To evaluate the anatomic and functional effect of microincision vitrectomy surgery (MIVS) with internal limiting membrane (ILM) peeling for macular edema secondary to branch retinal vein occlusion (BRVO).Methods: The medical records of 101 eyes of 101 patients who had undergone MIVS with ILM peeling for macular edema secondary to BRVO were studied. Patients were classified into ischemic and non-ischemic BRVO based on angiograph. The best-corrected visual acuity (BCVA) and central foveal thickness (CFT), determined by spectral domain optical coherence tomography, were evaluated at baseline and at 1, 3, 6, and 12 months postoperatively.Results: Preoperative mean logarithm of the minimum angle of resolution (logMAR) BCVA ± standard deviation (SD) was 0.52±0.43 and mean CFT ± SD was 489.4±224.9 µm. Postoperative mean BCVA ± SD values were 0.41±0.35, 0.35±0.41, 0.29±0.36, and 0.25±0.41, and mean CFT values were 370.1±148.9, 327.5±157.5, 310.9±154.9, and 274.4±135.3 µm at 1, 3, 6, 12 months, respectively. The mean BCVA was significantly improved at 3, 6, and 12 months postoperatively (all P

Maiko Inoue, Akira Arakawa, Shin Yamane, Kazuaki Kadonosono Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Background: The purpose of this study was to assess visual function and vision-related ­quality of life after intravitreal injection of ranibizumab (IVR) using a pro re nata regimen for the treatment of age-related macular degeneration.Methods: A prospective study of 54 eyes in 54 patients scheduled to undergo IVR for the treatment of exudative age-related macular degeneration was performed. A self-administered, 25-item National Eye Institute Visual Function Questionnaire (NEI VFQ-25) was completed before and 3 and 12 months after the initial IVR treatment. We evaluated logMAR visual acuity and NEI VFQ-25 scores preoperatively and postoperatively. Further, associations between the changes in NEI VFQ-25 scores and patient characteristics were investigated at 12 months. Results: Postoperative best-corrected visual acuity improved significantly when compared with the preoperative visual acuity throughout the 12-month period (P

Shin Yamane,1 Motohiro Kamei,2 Susumu Sakimoto,2 Maiko Inoue,1 Akira Arakawa,1 Mihoko Suzuki,2 Nagakazu Matsumura,2 Kazuaki Kadonosono11Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, 2Department of Ophthalmology, Osaka University Graduate School of Medicine, Osaka, JapanBackground: The purpose of this study was to evaluate visual outcomes of arteriovenous sheathotomy for macular edema due to branch retinal vein occlusion (BRVO).Methods: The medical records of 45 eyes from 45 patients who had undergone vitrectomy surgery with arteriovenous sheathotomy for BRVO were studied. Forty-five eyes of 45 patients with a BRVO but without intervention were studied as the control group. The best-corrected visual acuity and central macular thickness were compared between the two groups at baseline and at 1, 3, 6, and 12 months postoperatively.Results: Improvement of best-corrected visual acuity was 0.42 logarithm of the minimum angle of resolution (logMAR) units in the sheathotomy group and 0.22 logMAR units in the control group (P=0.007). The mean postoperative central macular thickness was significantly thinner in the sheathotomy group at 1 month (P=0.01), but not at 3, 6, and 12 months (P=0.75, P=0.81, and P=0.46, respectively). Improvement of best-corrected visual acuity at 12 months was significantly correlated with baseline best-corrected visual acuity, age, duration of symptoms, and sheathotomy (P

Jane Huang,1 Kazuaki Kadonosono,2 Eiichi Uchio1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Purpose: The most common external ocular viral infections are caused by several human adenovirus (HAdV) types. Ganciclovir has been reported to inhibit cytomegalovirus, herpes simplex virus types 1 and 2, varicella zoster virus, and Epstein–Barr virus. Ganciclovir ophthalmic gel, 0.15% (Virgan®) is commercially available for cytomegalovirus or herpes virus keratitis. However its inhibitory activity against HAdV is reported only for types 2 and 5. We investigated the antiadenoviral activity of ganciclovir in vitro in several common types currently inducing keratoconjunctivitis. Materials and methods: A549 cells were used for viral cell culture, and adenovirus types 3 (HAdV3; species B), 4 (species E), and 8, 19a, and 37 (species D) were used. After pretreatment of A549 with serial dilutions of ganciclovir for 24 hours, adenovirus was cultured for 7 days, and adenoviral deoxyribonucleic acid was quantitatively measured by real-time polymerase chain reaction (PCR). Results: The 50% cytotoxic concentration of ganciclovir was 212 mg/mL. The 50% effective concentration of ganciclovir obtained by real-time PCR ranged between 2.64 and 5.10 mg/mL. A significant inhibitory effect of ganciclovir on adenoviral proliferation was found in all types in a dose-dependent manner. The selectivity index of ganciclovir ranged between 41.6 and 80.3. Conclusion: Ganciclovir showed significant inhibitory activity against HAdV3, 4, 8, 19a, and 37, which induce epidemic keratoconjunctivitis. These results indicate that ganciclovir is a possible candidate for the treatment of HAdV keratoconjunctivitis, and ganciclovir ophthalmic gel could be applied to adenoviral keratoconjunctivitis in the future. Keywords: adenovirus, ganciclovir, epidemic keratoconjunctivitis, nucleoside analog, A549 cell line

Kaori Yanai,1 Jane Huang,1 Kazuaki Kadonosono,2 Eiichi Uchio1 1Department of Ophthalmology, Fukuoka University School of Medicine, Fukuoka, Japan; 2Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, Japan Purpose: To evaluate the safety of bromfenac sodium eye drops from the standpoint of corneal sensitivity and tear secretion in healthy controls following instillation for 1 month. Methods: A prospective single-blind parallel clinical study was conducted in 20 eyes of ten healthy volunteers with no history of ocular or systemic allergic disease, dry eye, contact lens wear, or ocular surgery. Participants were instructed to instill either bromfenac sodium or artificial tears in each eye twice daily for 28 days. Corneal sensitivity tested using a Cochet–Bonnet esthesiometer was evaluated before and immediately after instillation at 7, 14, and 28 days after the initiation of treatment. Tear secretion was also evaluated by Schirmer's eye test before and at 28 days. Results: No significant difference in mean corneal sensitivity and tear-secretion rate was observed between the bromfenac and artificial-tear treatment groups at any time. Conclusion: These results indicate that bromfenac sodium eye drops are safe with respect to corneal sensitivity and tear secretion in subjects with a normal ocular surface condition. Further evaluation is still necessary to determine whether bromfenac is safe in pathological conditions, such as inflammatory disorders and postsurgical cases. Keywords: bromfenac sodium, cornea, sensitivity, tear, nonsteroidal anti-inflammatory drug

Kaori Hirai1,4, Yoji Takano2, Eiichi Uchio3, Kazuaki Kadonosono41Department of Ophthalmology, International Goodwill Hospital, 2Department of Ophthalmology, Kitasato Institute Hospital, 3Department of Ophthalmology, Fukuoka, Fukuoka, Japan; 4Department of Ophthalmology, Yokohama City University Medical Center, Yokohama, JapanPurpose: To evaluate the therapeutic effects of atelocollagen absorbable punctal plugs.Method: Seventy-four eyes in 37 patients with dry eye disease (DED) underwent punctal plug occlusion using atelocollagen plugs and were followed up for 24 weeks. Subjective symptoms were evaluated using the ocular surface disease index (OSDI) questionnaire. Ocular surface disease parameters, including the Schirmer test, phenol red thread test, tear break-up time (TBUT), and fluorescein and Rose Bengal staining, were recorded before and 1, 4, 8, 16, and 24 weeks after treatment.Results: In comparison with the pretreatment data, the subjective symptoms and ocular surface disease parameters showed significant improvement after atelocollagen punctal occlusion. The average time of relapse was 17.4 ± 5.1 weeks. No severe complications occurred, and none of the plugs had to be removed because of local discomfort or epiphora.Conclusion: Atelocollagen absorbable punctal plugs effectively improved ocular surface disorders in DED. These plugs are a safe and effective alternative in the treatment of DED.Keywords: atelocollagen, absorbable punctual plug, dry eye

Abstract Background Anti-vascular endothelial growth factor (VEGF) drugs and/or photodynamic therapy (PDT) constitute current treatments targeting pathological vascular tissues in tumors and age-related macular degeneration. Concern that PDT might induce VEGF and exacerbate the disease has led us to current practice of using anti-VEGF drugs with PDT simultaneously. However, the underlying molecular mechanisms of these therapies are not well understood. Methods We assessed VEGF levels after PDT of normal mouse retinal tissue, using a laser duration that did not cause obvious tissue damage. To determine the role of PDT-induced VEGF and its downstream signaling, we intravitreally injected a VEGF inhibitor, VEGFR1 Fc, or a PI3K/Akt inhibitor, LY294002, immediately after PDT. Then, histological and biochemical changes of the retinal tissue were analyzed by immunohistochemistry and immunoblot analyses, respectively. Results At both the mRNA and protein levels, VEGF was upregulated immediately and transiently after PDT. VEGF suppression after PDT resulted in apoptotic destruction of the photoreceptor cell layer in only the irradiated area during PDT. Under these conditions, activation of the anti-apoptotic molecule Akt was suppressed in the irradiated area, and levels of the pro-apoptotic protein BAX were increased. Intravitreal injection of a PI3K/Akt inhibitor immediately after PDT increased BAX levels and photoreceptor cell apoptosis. Conclusion Cytotoxic stress caused by PDT, at levels that do not cause overt tissue damage, induces VEGF and activates Akt to rescue the neural tissue, suppressing BAX. Thus, the immediate and transient induction of VEGF after PDT is neuroprotective.

We investigated the relationship between time-course changes in the retinal artery angle and metamorphopsia in eyes with idiopathic epiretinal membrane (ERM). Over all, Thirty-seven patients who underwent vitrectomy surgery for ERM were enrolled. In addition to visual acuity (VA), the metamorphopsia score was measured for each eye using M-CHARTS. Moreover, pre- and postoperative retinal artery angle (YCA) was measured using ImageJ software. The difference between pre- and postoperative metamorphopsia score (Mdif), the difference between pre- and postoperative CRT (CRTdif) and the ratio of postoperative YCA to preoperative YCA (pYCA) were calculated and used for the statistical analysis. We investigated the relationship between Mdif and each of age, axial length (AL), pYCA, CRTdif and the follow-up duration. The association of pYCA with Mdif was also investigated in improved VA group (gained at least 0.2 logMAR) and unimproved VA group (gained less than 0.2 logMAR). The logMAR VA and metamorphopsia score significantly improved after vitrectomy surgery (both p < .001). The postoperative YCA was significantly larger than the preoperative YCA (p < .0001). Among age, AL, pYCA, CRTdif and the follow-up duration, pYCA and the follow-up duration were significantly associated with Mdif. Subgroup analysis indicated pYCA was significantly related to Mdif in unimproved VA group, but not in improved VA group. Monitoring the time-course change in the retinal artery angle might be useful for predicting the improvement in metamorphopsia after vitrectomy surgery in ERM eyes., Competing Interests: Declarations. Competing interests: The authors declare no competing interests., (© 2024. The Author(s).)

The purpose of this study was to evaluate the treatment outcomes of patients with pachychoroid neovasculopathy (PNV) who received photodynamic therapy (PDT) combined with intravitreal anti-vascular endothelial growth factor (VEGF) agents, with a particular focus on the fluorescein angiography (FA) findings. We retrospectively studied 33 eyes of 32 consecutive treatment-naïve patients with PNV who were scheduled for PDT combined with anti-VEGF agents between November 2017 and May 2022, with a follow-up period of 1 year or longer. We classified patients into two groups: central serous chorioretinopathy (CSC)-dominant type and macular neovascularization (MNV)-dominant type based on the baseline FA findings. The best-corrected visual acuity (BCVA) was compared before treatment and at 3, 6, and 12 months after the initial treatment. Additionally, recurrence rate, and number of additional injections during the maintenance phase were assessed. We classified 19 eyes with the CSC-dominant type, and 14 eyes with the MNV-dominant type. The BCVA improved significantly 1 year after the initial treatment only in the CSC-dominant type (P = 0.001). The recurrence rate in the maintenance phase was lower in the CSC-dominant type (15.8%) compared to the MNV-dominant type (57.1%), a difference that reached significance (P = 0.024).This study highlights the distinct treatment outcomes between the CSC-dominant and MNV-dominant types; specifically, CSC-dominant type had better visual improvement and a lower recurrence rate than the MNV-dominant type. These differences underscore the potential of FA as a useful biomarker to predict visual outcomes and recurrence in the maintenance phase in patients with PNV., Competing Interests: Declarations. Competing interests: The authors declare no competing interests. Conflict of interest: All authors declare no conflict of interest., (© 2024. The Author(s).)

Purpose: To investigate the incidence and predictors of visual acuity (VA) loss after surgery for epiretinal membrane (ERM) in glaucomatous eyes., Methods: A prospective cohort study examining VA and central visual fields (VFs, Humphrey 10-2) at baseline and 3, 6, and 12 months after vitrectomy with internal limiting membrane peeling for ERM in the glaucoma (47 eyes of 43 patients) and control (46 eyes of 46 patients) groups. VA and VF tests were repeated for ≥1.5 years only for the glaucoma group. Factors associated with substantial VA loss [>0.2 logMAR (about >2 lines on the Snellen chart) from baseline] were determined using a Cox proportional hazards model., Results: Until 1 year postoperatively, no substantial VA loss occurred and postoperative VA improved significantly and similarly in both groups (P<0.001 vs. baseline, P>0.15 between two groups). Substantial VA loss occurred in eight eyes (17%) with glaucoma ≥1.5 years postoperatively, which was associated with worse preoperative VF mean deviation and 1-year mean decrease in postoperative VF mean deviation (hazard ratio = 0.83, 0.72; P = 0.018, <0.001, respectively)., Conclusions: Substantial VA loss occurred long after ERM surgery in eyes with glaucoma, which was associated with worse preoperative central VFs and greater central VF deterioration during the first postoperative year.

Purpose: To investigate the association between the thickness of the retinal pigment epithelium (RPE)-Bruch's membrane (BM) complex and the development of retinal autograft edema as a postoperative complication following autologous retinal transplantation (ART)., Methods: This retrospective study examined data from 28 eyes of 28 patients (14 males, 14 females; mean age, 61.5 ± 19.8 years) who underwent ART and were followed for 1 year. The RPE-BM complex thickness was measured 2000 µm from the fovea using Image J software. Additionally, the graft blood flow was also evaluated by optical coherence tomography angiography and fluorescein angiography., Results: Macular hole (MH) diameters ranged from 711.2 ± 251.9 µm to 1299.9 ± 333.0 µm, with MH closure achieved in all patients. RPE-BM complex thickness decreased by 4.17 µm at 6 months and 4.34 µm at 1 year, showing significant differences from preoperative measurements (29.88 ± 4.99 µm; 6 months: 95% confidence interval [CI], 1.62-6.71, P = 0.0018; 1 year: 95% CI, 2.03-6.65 µm, P = 0.00044). The decrease was significantly greater in the edema-positive group (95% CI, -8.33 to -0.82, P = 0.020). Furthermore, the rates of ellipsoid zone (EZ) recovery, alignment of neurosensory layers (ANL), and graft reperfusion were lower in the edema-positive group (EZ, P = 0.017; ANL, P = 0.0098; reperfusion, P = 0.039)., Conclusions: After ART, RPE-BM complex thickness decreases, particularly in cases with postoperative edema, suggesting a potential relationship between RPE function and postoperative outcomes, highlighting the importance of monitoring RPE-BM complex thickness after surgery.

Purpose: To evaluate retinal circulation in eyes with central retinal artery occlusion (CRAO)., Methods: The best-corrected visual acuity (BCVA), fluorescein angiography (FA), and laser speckle flowgraphy (LSFG) values were measured at the first visit in 42 patients with CRAO (42 eyes; mean age, 66.0±14.0 years. LSFG was performed at baseline, 1 week, and 1, 3, and 6 months; the difference between the mean blur rate vessel area and mean blur rate tissue area (MV-MT), reflecting the retinal vessel blood flow, was measured. FA measured the arteriovenous passage (AV) time. Time-course changes in the MV-MT and BCVA and the relationship between MV-MT and final BCVA were examined., Results: MV-MT was significantly correlated with AV time (P<0.001). The MV-MT increased significantly after 1, 3, and 6 months (P<0.001). The VA improved significantly until 1 month (P<0.01). Multivariate analysis showed a significant correlation between the baseline BCVA (P<0.001) and MV-MT at 1 month (P=0.01) and the final BCVA. Age and MV-MT were significantly negatively correlated at 1 month (P<0.001)., Conclusions: The retinal circulation improved significantly within 1 month; younger patients had better retinal circulation improvement. The baseline BCVA and retinal circulation within 1 month were correlated with the final BCVA., Competing Interests: Conflict of interests: no conflicting relationship exists for any author.

Purpose: To construct a quantitative evaluation system for hand tremor during internal limiting membrane (ILM) peeling and investigate changes in hand tremor attributable to the use of the customized passive surgical support robot., Methods: This analytical and experimental study developed a hand tremor evaluation system that synchronizes three elements: surgical microscope images, an artificial eye module with a force sensor to simulate ILM peeling, and microforceps with an inertial measurement unit. Two surgeons used this system to measure hand tremor during ILM peeling with and without the robot., Results: The horizontal, vertical, and combined vertical and horizontal components of hand tremor were 8.1 ± 6.1, 1.7 ± 1.8, and 8.5 ± 6.2 mG, respectively, in the no robot group. These components decreased to 7.2 ± 6.0, 1.5 ± 1.7, and 7.5 ± 6.1 mG, respectively, in the robot group. In particular, hand tremor was significantly suppressed by 11.9% for the horizontal component using the robot (p = 0.0006)., Conclusion: The newly constructed system helps to quantitatively evaluate hand tremor during ILM peeling. The customized passive surgical support robot enables to decrease hand tremor during ILM peeling., Competing Interests: Conflict of interest: The other authors declare no conflicts of interest.

Objective: To review recent technological advancement in imaging, surgical visualization, robotics technology, and the use of artificial intelligence in surgical vitreoretinal (VR) diseases., Background: Technological advancements in imaging enhance both preoperative and intraoperative management of surgical VR diseases. Widefield imaging in fundal photography and OCT can improve assessment of peripheral retinal disorders such as retinal detachments, degeneration, and tumors. OCT angiography provides a rapid and noninvasive imaging of the retinal and choroidal vasculature. Surgical visualization has also improved with intraoperative OCT providing a detailed real-time assessment of retinal layers to guide surgical decisions. Heads-up display and head-mounted display utilize 3-dimensional technology to provide surgeons with enhanced visual guidance and improved ergonomics during surgery. Intraocular robotics technology allows for greater surgical precision and is shown to be useful in retinal vein cannulation and subretinal drug delivery. In addition, deep learning techniques leverage on diverse data including widefield retinal photography and OCT for better predictive accuracy in classification, segmentation, and prognostication of many surgical VR diseases., Conclusion: This review article summarized the latest updates in these areas and highlights the importance of continuous innovation and improvement in technology within the field. These advancements have the potential to reshape management of surgical VR diseases in the very near future and to ultimately improve patient care., Financial Disclosure(s): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article., (Copyright © 2024 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.)

Purpose of Review: To highlight the recent progression in surgical treatments for central retinal vein occlusion (CRVO) and central retinal artery occlusion (CRAO)., Recent Findings: Anti-VEGF treatment, accepted as a primary treatment for CRVO, is unable to effectively treat all types of the diseases. Regarding CRAO, there are not any accepted therapies available. There have however been recent innovations in surgery, such as utilizing robotics-assisted tools in cannulation procedures for central retinal artery occlusion, or micro-cystotomy for refractory macular edema resulting from ischemic CRVO., Summary: Refractory macular edema due to CRVO can be treated with aspiration of the fluid found inside the large cysts often seen in edema. The success rate of micro-cystotomy has been reported at 78% in eyes with refractory macular edema. Recent studies have shown that cannulation with tissue plasminogen activator (tPA) is effective for eyes with CRAO due to thrombus.Recent cannulation or micro-cystotomy procedures can be enhanced with the use of robotic tools which allow us to perform this difficult procedure more easily. Newly developed technology, and consequent developments in surgical procedures, will allow us to deal with unmet needs for retinal vessel occlusive diseases., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)

Purpose: This study investigates the visual outcomes of neovascular age-related macular degeneration (nAMD) patients who developed intraocular inflammation (IOI) after intravitreal brolucizumab injection (IVBr)., Methods: We studied 285 eyes of 279 cases diagnosed with nAMD and focused on 18 eyes (6.3%) of 17 cases which developed IOI after IVBr. IVBr was performed either on the initial treatment or for switching of other anti-vascular endothelial growth factor agents during January 2020 to December 2021. We evaluated clinical features and the course of treatment of a 6-month follow-up after IOI occurred., Results: Of 17 cases, 9 cases were male, 8 cases were female. Baseline logarithm of the minimum angle of resolution(logMAR) best-corrected visual acuity (BCVA) was 0.36, BCVA before IOI occurred was 0.30, and BCVA when IOI occurred was 0.43. 16 eyes (88.9%) had symptoms such as visual loss or floaters when IOI occurred. On the other hand, the remaining 2 eyes (11.1%) had no symptoms. 11 eyes (61.1%) had only IOI, while the remaining 7 eyes (38.9%) had IOI and perivascular sheathing. Steroid sub-tenon injection was performed on 1 eye (5.6%), steroid eye drops were used in 11 eyes (61.1%), and 6 eyes (33.3%) were followed-up without treatment. Neovascular AMD recurred in 16 eyes (88.9%) after IOI occurred and were treated with aflibercept. VA at 3 and 6 months after IOI occurred were significantly improved to 0.34 and 0.30, respectively (P = 0.09 at 3 months and P = 0.02 at 6 months). The symptoms of patients were improved in all cases. We were able to stop steroid treatment in all cases., Conclusions: IOI occurred in 6.3% of nAMD patients after IVBr treatment. All of which showed significant improvement from logMAR of 0.43 to 0.30 with steroid treatment or without any treatment. We should consider the possibility of IOI after IVBr as a complication, however, they have a relatively good prognosis if treated at an early stage., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Hirono et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

Purpose: To assess the natural history and surgical outcomes of lamellar macular holes (LMHs)., Design: Retrospective and consecutive case series., Subjects: Patients with LMHs from multiple tertiary care centers., Methods: Clinical charts and OCT scans were reviewed., Main Outcome Measures: The visual acuity (VA) changes and the occurrence rate of full-thickness macular hole (FTMH) were studied in both groups. Within the operated group, factors associated with 6-month VA and development of FTMH were explored., Results: One hundred seventy-eight eyes were included, of which 89 were monitored and 89 underwent surgery. In the observation group, the mean VA decreased from 0.25 ± 0.18 to 0.28 ± 0.18 logarithm of the minimum angle of resolution (logMAR; P = 0.13), with 14 eyes (15.7%) that lost ≥ 0.2 logMAR VA, after 45.7 ± 33.3 months. Nine eyes (10.1%) spontaneously developed an FTMH. In the operated group, the mean VA increased from 0.47 ± 0.23 to 0.35 ± 0.25 logMAR at 6 months (P < 0.001) and 0.36 ± 0.28 logMAR (P = 0.001) after 24.1 ± 30.1 months. By multivariate analysis, better baseline VA (P < 0.001), the presence of an epiretinal membrane (P = 0.03), and the peeling of the internal limiting membrane (ILM; P = 0.02), with a greater effect of ILM perihole sparing, were associated with a greater 6-month VA. Perihole epiretinal proliferation sparing was associated with a better postoperative VA by univariate analysis (P = 0.03), but this was not significant by multivariate analysis. Eight eyes (9.0%) developed a postoperative FTMH. Using Cox proportional hazard ratios [HRs], pseudophakia at baseline (HR, 0.06; 95% confidence interval [CI], 0.00-0.75; P = 0.03) and peeling of the ILM (HR, 0.05; 95% CI, 0.01-0.39; P = 0.004) were protective factors, while ellipsoid zone disruption (HR, 10.5; 95% CI, 1.04-105; P = 0.05) was associated with an increased risk of FTMH., Conclusion: Observed eyes with LMH experienced, on average, progressive VA loss. Patients with LMH and altered vision may benefit from surgery. Internal limiting membrane peeling, with perihole ILM sparing, represents a crucial step of the surgery associated with a greater VA and a lower risk of postoperative FTMH., Financial Disclosure(s): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article., (Copyright © 2023 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.)

Purpose: This study aimed to compare functional and morphologic changes in the loading phase between patients with treatment-naïve macular neovascularization (MNV) due to neovascular age-related macular degeneration (nAMD) treated with either intravitreal brolucizumab (IVBr) or intravitreal faricimab (IVF) injections in a clinical setting., Methods: We retrospectively studied 92 consecutive eyes of 90 patients with neovascular nAMD who were scheduled to receive IVBr (42 eyes of 41 patients) or IVF (50 eyes of 49 patients) injections between October 2021 and December 2022. All patients received three consecutive monthly injections of 6.0 mg/0.05 mL brolucizumab or 6.0 mg/0.05 mL faricimab. The best-corrected visual acuity (BCVA), central foveal thickness (CFT), and central choroidal thickness (CCT) at baseline and 1, 2, and 4 months after the initial treatment were measured and compared between the groups., Results: Thirty-seven eyes in IVBr group and forty-seven eyes in IVF group who finished treatments in the loading phase were assessed at the follow-up examination. The BCVA, CFT, and CCT changed significantly after loading phase in both groups (P < 0.05 for both comparisons). The IVBr group had more rapid improvement of the BCVA (P = 0.037) at 1 month than the IVF group, but there was no difference at 4 months (P = 0.367). The CFT and CCT decreases tended to be greater in the IVBr group than in the IVF group throughout the follow-up period. Of the five eyes excluded from the IVBr group, one eye (2.4%) each had intraocular inflammation (IOI) and was a non-responder, and two eyes (4.8%) had retinal pigment epithelial tears after treatment. Of the three eyes excluded from the IVF group, two eyes (4.0%) did not respond to the treatment., Conclusions: Both IVBr and IVF injections were well-tolerated and improved the VA in treatment-naïve patients with MNV due to nAMD after a loading phase, although IVBr caused a trend toward faster visual improvements in the BCVA. The IVBr group also had greater reductions of the CFT and CCT than the IVF group. However, the potential for adverse events and no response to treatment with each drug are considerations., (© 2023. The Author(s).)

Purpose: To compared the vessel density (VD) around the optic nerve head (ONH) in eyes with cone-rod dystrophy (CORD) and healthy control eyes in a sector-wise manner and to investigate the relationship between VD around the ONH and visual function in CORD eyes., Methods: Twenty-six eyes in 14 CORD patients and 25 eyes in 25 healthy control subjects were examined. Using OCT angiography images, the VDs in the superficial and deep capillary plexus at the macula (sVDm and dVDm) and those around the ONH in the superior, temporal, inferior and nasal region (VDnh&#95;s, VDnh&#95;t, VDnh&#95;i, and VDnh&#95;n, respectively) were measured for each eye. Patient age, visual acuity (VA) and VDs were then compared between two groups. Moreover, the relationships between VA and the VDs were analyzed using a linear mixed model and AICc model selection., Results: No significant difference in age was seen between the CORD and control groups (p = 0.87, Wilcoxon rank sum test), but the VA was significantly lower in the CORD group (p<0.0001). Both sVDm and dVDm were significantly lower in the CORD eyes than in the control eyes (both p<0.0001). Among VDnh&#95;s, VDnh&#95;t, VDnh&#95;i, and VDnh&#95;n, however, only VDnh&#95;t differed significantly between the CORD and control groups (p = 0.035). Among age, VDnh&#95;t, dVDm, and sVDm, the optimal model for VA included only VDnh&#95;t and dVDm., Conclusions: In addition to the VD in the deep capillary plexus at the macula, the measurement of temporal VD around the ONH might be useful for predicting visual function in eyes with CORD., Competing Interests: The authors have no competing interests., (Copyright: © 2024 Shinozuka et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

Introduction: The retinal pigment epithelium (RPE) plays essential roles in maintaining retinal functions as well as choroidal capillaries and can lead to visual disorders if dysfunctional. Transplantation of human-induced pluripotent stem cell-derived RPE (hiPSC-RPE) is a promising therapy for such RPE impaired conditions including age-related macular degeneration. The challenge with cell suspension transplantation is targeted delivery of graft cells and undesired cell reflux. Gelatin hydrolysate, a soluble variant with specific molecular weight distribution, is examined in this study for its potential use in hiPSC-RPE suspension transplantation, particularly in reducing cell reflux and enhancing RPE engraftment., Methods: A retinal bleb model was created using polydimethylsiloxane (PDMS) soft lithography to quantify cellular reflux. We examined the effects of gelatin hydrolysate on the hiPSC-RPE of various aspects of cell behavior and performance such as cell viability, hypoxia reaction, morphology, induction of inflammation and immune responses., Results: Gelatin hydrolysate at 5 % concentration effectively mitigated cell reflux in vitro mimic, improved cell viability, reduced cell aggregation, and had an inhibitory effect on hypoxic reactions due to cell deposition with hiPSC-RPE. Additionally, gelatin hydrolysate did not affect cell adhesion and morphology, and decreased the expression of major histocompatibility complex class II molecules, which suggests reduced immunogenicity of hiPSC-RPE., Conclusion: Gelatin hydrolysate is considered a valuable and useful candidate for future regenerative therapies in hiPSC-RPE suspension transplantation., Competing Interests: The authors declare no conflict of interest., (© 2024 The Japanese Society for Regenerative Medicine. Production and hosting by Elsevier B.V.)

Objective: Cystoid macular edema (CME) in retinitis pigmentosa (RP) is an important complication causing visual dysfunction. We investigated the effect of CME on photoreceptors in RP patients with previous or current CME, using an adaptive optics (AO) fundus camera., Methods: We retrospectively observed the CME and ellipsoid zone (EZ) length (average of horizontal and vertical sections) by optical coherence tomography. The density and regularity of the arrangement of photoreceptor cells (Voronoi analysis) were examined at four points around 1.5° from superior to inferior and temporal to nasal. We also performed a multivariate analysis using CME duration, central macular thickness and transversal length of CME., Results: We evaluated 18 patients with previous or current CME (18 eyes; age, 48.7 ± 15.6 years) and 24 patients without previous or current CME (24 eyes; age, 46.0 ± 14.5 years). There were no significant differences in age, logMAR visual acuity, or EZ length. In groups with and without CME, cell density was 11967 ± 3148 and 16239 ± 2935 cells/mm2, and sequence regularity was 85.5 ± 3.4% and 88.5 ± 2.8%, respectively; both parameters were significantly different. The correlation between photoreceptor density and age was more negative in group with CME. The CME group tended toward greater reductions in duration of CME., Conclusion: Complications of CME in RP patients may lead to a decrease in photoreceptor density and regularity. Additionally, a longer duration of CME may result in a greater reduction in photoreceptor density., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Kitahata et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)

Competing Interests: The authors declare that they have no conflicts of interest to disclose.

Our current study aimed to investigate the association of preoperative OCT parameters with visual function after vitrectomy surgery in eyes with epiretinal membrane (ERM). This study enrolled 33 eyes with ERM that underwent vitrectomy surgery. In addition to visual acuity (VA), metamorphopsia was measured pre- and postoperatively for each eye. Using the preoperative horizontal and vertical OCT images, SUKIMA (the gap area between the ERM and retinal surface) was measured respectively and the average of horizontal SUKIMA and vertical SUKIMA was used for the analysis. The associations of baseline parameters (age, axial length, preoperative central retinal thickness [CRT], inner nuclear layer [INL] thickness, ectopic inner foveal layer [EIFL] and SUKIMA) with postoperative VA, the change in VA, postoperative metamorphopsia and the improvement in metamorphopsia were investigated using multivariate regression analysis followed by the model selection. The result suggested that age and INL thickness were related to the postoperative VA, whereas age and preoperative CRT were significantly associated with the change in VA. In contrast, only SUKIMA was correlated with the postoperative metamorphopsia, whilst age, EIFL and SUKIMA were associated with the improvement in metamorphopsia. Measuring SUKIMA might be useful for predicting postoperative metamorphopsia and the improvement in metamorphopsia in ERM eyes., (© 2023. The Author(s).)

The present study aimed to compare retinal sensitivity (RS) at each stage and to evaluate the relationship between RS and fundus autofluorescence (FAF) pattern in adult-onset foveomacular vitelliform dystrophy (AOFVD). We retrospectively reviewed 17 eyes of 13 patients with AOFVD. In addition to best-corrected visual acuity (VA), RS within the affected lesion and optical coherence tomography (OCT) measurements were carried out in each participant. All the examined eyes were classified into 4 stages and 3 FAF patterns. RS was superimposed on OCT fundus image and RS within the affected lesion was calculated in each eye. The relationships between visual functions (VA and RS within the affected lesion) and stages and also FAF patterns were analyzed using the linear mixed model. As a result, RS within the affected lesion was significantly associated with FAF pattern, but not with stage. In contrast, VA was correlated with neither stages nor FAF patterns. Our current result suggested that RS within the affected lesion was related to FAF patterns but this was not the case with VA in eyes with AOFVD, demonstrating the usefulness of measuring RS, not only VA, to comprehend the disease status in AOFVD., (© 2023. The Author(s).)

To characterize and compare macular vessel density in central retinal artery occlusion (CRAO) eyes with retinal arterial cannulation and CRAO eyes with standard treatment. This study was Cross-sectional, observational study. Twenty-two eyes with nonarteric CRAO which underwent retinal arterial cannulation and 19 eyes with nonarteric CRAO with standard treatment were included. Optical coherent tomography angiography (OCTA)-based macular vessel density and visual acuity were examined. The dynamic ranged-based normalized rates of vessel density was compared within each group at the first visit to the clinic and 7 days after the onset. Macular vessel density in cannulation group was significantly better at 7 days after the onset than that at the first visit (3.73 ± 3.02 mm -1 vs. 7.89 ± 1.02 mm -1 , P = 0.0001), while there wasn't significant improvement of macular vessel density in standard treatment group at 7 days after the onset (2.13 ± 1.62 mm -1 vs. 2.89 ± 0.22 mm -1 , P = 0.067). At one month after the onset, mean LogMAR visual acuity in CRAO eyes with cannulation significantly improved compared with that at the first visit after the onset (1.678 vs. 0.979, P = 0.00012). Macular vessel density loss in CRAO eyes was improved by retinal arterial cannulation. Early intervention of retinal arterial cannulation is useful for minimizing visual impairment in CRAO eyes., (© 2023. The Author(s).)

Purpose: To customize a passive surgery support robot for ophthalmic surgery and preliminarily evaluate its performance., Study Design: Prospective observational study., Methods: The range of motion of the arm was analyzed during ophthalmic surgery and, based on this analysis, a commercially available passive robot was customized for surgical support for ophthalmic surgery; following which a prototype robot was constructed. To examine the effects on the brachial muscle during surgical operations with and without the prototype robot, surface electromyograms of the biceps and triceps were analyzed after performing continuous curvilinear capsulorrhexis (CCC) and suturing the sclerocorneal wound in a cataract surgery simulation. Six surgeons performed cataract surgery, and the degree of arm stability and muscle fatigue during surgery were evaluated using a visual analog scale., Results: During surgery, the prototype robot enabled fixation of the elbow and wrist at any position within the surgeon's range of motion, expanding the range of motion of the hand and fingers and stabilizing operability. Surface electromyography showed a significant decrease in the mean amplitude value of the biceps brachii during both CCC and suturing (p < 0.0001). No significant difference was observed in the triceps brachii. The arm stability and muscle fatigue were improved by 83.3% on the visual analog scale with the prototype robot compared with that without protpotype robot., Conclusion: The use of a passive prototype robot may improve arm stability and reduce muscle fatigue during ophthalmic surgery., (© 2023. Japanese Ophthalmological Society.)

Purpose: This study aims to investigate the postoperative refractive outcomes in eyes that underwent the flanged intrascleral intraocular lens (IOL) fixation combined with vitrectomy with or without gas/air tamponade., Methods: The eyes were divided into two groups (Group A; eyes that underwent flanged intrascleral IOL fixation with gas/air tamponade, and Group B; eyes that underwent flanged intrascleral IOL fixation without gas/air tamponade). The predicted spherical equivalent (SE) refraction values were calculated using the Sander-Retzlaff-Kraff Theoretical formula. Then, the prediction error was calculated by subtracting the predicted SE refraction from the postoperative objective SE refraction and the absolute prediction error was calculated as the absolute value of the prediction error for each eye., Results: A total of 68 eyes were included in the current study. There was a significant correlation between the predicted and postoperative SE refraction in both groups (Group A, r = 0.968, P < 0.0001, Group B, r = 0.943, P < 0.0001, linear regression analysis). The prediction error demonstrated a mild myopic shift after the flanged intrascleral IOL fixation in both groups (Group A, -0.40 ± 0.96 diopter, Group B, -0.59 ± 0.95 diopter). There was no significant difference in prediction error and absolute prediction error between the two groups ( P = 0.44, P = 0.70, Wilcoxon rank sum test)., Conclusion: The postoperative SE refraction after flanged intrascleral IOL fixation was not influenced by gas/air tamponade.

Purpose: To evaluate the relationship between retinal haemorrhages detected on Ultra-widefield (UWF) red channel images and perfusion status in eyes with acute central retinal vein occlusion (CRVO)., Methods: UWF fundus images were split into green and red channels using ImageJ software. The retinal haemorrhages were calculated quantitatively with both the green and red channel images, resulting in green channel haemorrhages (GCH) and red channel haemorrhages (RCH). The nonperfusion area (NPA) was also calculated from fluorescein angiography in each eye. The relationships between both the GCH and RCH with the NPA were investigated., Results: Thirty-two eyes of 32 patients with acute CRVO (18 men, 14 women) were included. The mean GCH and RCH values were 10.4% ± 8.2% and 1.7% ± 1.7%, respectively. The mean NPA was 39.2% ± 28.8%. Significant correlations were seen between the GCH and NPA (r = 0.38; P = 0.022) and RCH and NPA (r = 0.44; P = 0.010, linear regression analysis). Multivariate analysis suggested that only the RCHs were correlated significantly with the NPA., Conclusions: Retinal haemorrhages detected by UWF red channel imaging were less compared to green channel imaging and associated closely with retinal NPAs in eyes with acute CRVO. UWF red channel imaging allowed us to identify ischaemia-related haemorrhage., (© 2022. The Author(s), under exclusive licence to The Royal College of Ophthalmologists.)