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Objectives: to investigate the effect of the novel coronavirus disease 2019 (COVID-19) pandemic on the clinical practice of ophthalmologists in our country. Materials and methods: a questionnaire consisting of 22 questions was delivered to 250 ophthalmologists via e-mail and a smartphone messaging application. A total of 113 ophthalmologists completed the survey. The questions included the participants’ demographic data (age, years in practice, institution, and city), changes in their working conditions and institutional preventive measures implemented during the pandemic, their personal COVID-19 experiences, the prevalence of telemedicine applications, and their attitudes toward these practices. Results: nearly half (47.8%) of the 113 ophthalmologists were 36 to 45 years old. In terms of years in practice, the largest proportion of respondents (28.3%) had 6-10 years of experience. Most of the participants worked in private/foundation universities (37.2%), while 22.1% worked in education and research clinics. Participants working at public universities most often reported that they or a close contact had to work in COVID wards (89.5%). Triage was performed in 51.5% of ophthalmology outpatient clinics, with 88.0% of these participants reporting that patients with fever, cough, or dyspnea were directed to the pandemic clinic without ophthalmological examination. All participants working in public hospitals, education and research clinics, and public university hospitals had postponed elective surgeries, whereas 12.5% of those working in private practice and 20.5% of those working in private/foundation universities reported that they continued elective surgeries. While 80.8% of the participants did not conduct online interviews or examinations, 40.4% stated that they considered telemedicine applications beneficial. Seventy-seven percent of participants expressed concern about a decrease in their income during the pandemic, with this being especially common among participants working in private practice (87.5%) and private/foundation university hospitals (85.7%). Conclusion: ophthalmologists across our country have been affected by this pandemic at a level that will change their clinical approach. We think that ophthalmologists impacted by the difficulty of providing personal protective equipment and economic concerns should be supported more during the pandemic., NA

Purpose: The aim of our study is to investigate the effect of dihydrotestosterone (DHT) on the inflammatory response of the human conjunctival epithelial cells (HConjECs) under stress conditions. Methods: HConjECs were cultured with or without 10−8 M dihydrotestosterone (DHT) in normal osmolar conditions for 48 hours. Then, the media was changed to a higher osmolarity for different time points to demonstrate the effect of hyperosmolar stress conditions on both treated and untreated cells. After the cell pellet was lysed with radioimmunoprecipitation assay (RIPA), phosphorylated and nonphosphorylated forms of p38 kinase, extracellular signal-regulated kinase 1/2 (ERK1/2), and c-Jun N-terminal kinase 1/2 (JNK1/2) were analysed by western blot. The gene expressions of TNF-α, IL-1β, and IL-8 were measured with a real-time polymerase chain reaction. The cell viability was checked with Annexin V/PI. Results: Pretreatment with 10−8M DHT inhibited the hyperosmolarity-induced expression of TNF-α and IL-1β. Expression of p-P38 was inhibited with DHT pretreatment but only DHT-pretreated HConjECs suppressed p-ERK up to 30 minutes after hyperosmolar stress. DHT pretreatment inhibited apoptosis in HConjECs. Conclusion: These data revealed the potential importance of DHT in the treatment of DED. Furthermore, our findings may contribute to a better understanding of how sex hormones affect different ocular surface diseases and their potential for therapy.

PURPOSE To investigate the repeatability of choroidal vascularity index (CVI) measurements in centered and decentered (regarding pupil entry position of the beam) directional subfoveal optical coherence tomography (OCT) scans with (CVI1) and without (CVI2) brightness adjustment. METHODS Thirty-two eyes of 32 healthy volunteers were included in this prospective study. First, the fovea was evaluated by a single horizontal enhanced depth imaging OCT scan in a centered direction. Then, the same subfoveal horizontal line was scanned in a decentered direction. The agreement between CVIs obtained from these centered and decentered directional OCT scans was investigated using Bland-Altman analysis and intraclass correlation coefficient. RESULTS Intraclass correlation coefficient between centered and decentered CVI1 was 0.71 (95% CI: 0.48-0.85, P value < 0.001). Intraclass correlation coefficient between centered and decentered CVI2 was 0.73 (95% CI: 0.5-0.86, P value < 0.001). The mean difference between centered and decentered directional measurements for CVI1 and CVI2 were 0.5 and 0.8, respectively. CONCLUSION There is moderate agreement between CVIs obtained from centered and decentered directional single OCT scans of the same subfoveal area. Studies investigating choroidal vascularity should be standardized by using the same OCT beam direction in all scans.

SIGNIFICANCE Choroidal vascularity index measured by image binarization method from peripapillary optical coherence tomography sections has been found significantly lower in papilledema patients than healthy controls. PURPOSE The purpose of this study was to compare peripapillary choroidal parameters in papilledema patients with control subjects. METHODS Peripapillary spectral domain optical coherence tomography scans of 34 patients with papilledema and 34 healthy controls are acquired for the study. Images are binarized with the ImageJ software (National Institutes of Health, Bethesda, MD) to calculate total choroidal area, stromal area, luminal area, and choroidal vascularity index. RESULTS Total choroidal area, luminal area, and choroidal vascularity were significantly lower in papilledema patients compared with healthy controls on right (1.343 ± 0.286 vs. 1.694 ± 0.344, P < .001; 0.880 ± 0.209 vs. 1.167 ± 0.255, P < .001; 65.28 ± 2.99% vs. 68.68 ± 2.81%, P < .001, respectively) and left eyes (1.376 ± 0.308 vs. 1.647 ± 0.339, P < .001; 0.899 ± 0.231 vs. 1.134 ± 0.237, P < .001; 64.92 ± 3.44 vs. 68.84 ± 3.23, P < .001, respectively). No difference was found between active and remitted stages of papilledema in terms of choroidal parameters. CONCLUSIONS Peripapillary total choroidal area, luminal area, and choroidal vascularity index are significantly reduced in patients with papilledema. These parameters might be beneficial tools for evaluating choroidal vascularity in papilledema quantitatively and differential diagnosis for optic disc edema.

Introduction: Clear corneal incision (CCI) architecture in modern microincision cataract surgery (MICS) plays an undeniable role in postoperative refraction. The goal of this study was to evaluate the effect of hinge incision prior to two-step CCI on postoperative refractive astigmatism after cataract surgery and to demonstrate the schematic presentation of these postoperative astigmatic changes via double-angle polar plots. Methods: this study involved a consecutive case series of patients who had MICS. The first incision was performed as a two-step CCI, whereas the second was made as a hinge incision prior to 2-step CCI. The preoperative corneal and postoperative refractive astigmatism and surgically induced astigmatism (SIA) were calculated by vectorial analysis. Hotelling’s T2 test was performed to compare the centroid values of preoperative and postoperative corneal astigmatism. Results: a total of 63 eyes from 57 subjects were evaluated. Group I consisted of 27 eyes with the two-step CCI, and Group II included 36 eyes with the hinge incision prior to two-step CCI. No significant difference was found between the groups in terms of age, sex, axial length, keratometry readings, implanted intraocular lens power, and postoperative spherical equivalent. The centroids of corneal astigmatism postoperatively increased to 0.21 D at 87.6°±0.61 with no significance in Group I (p=0.525) and to 0.70 D at 90.6°±0.47 with significance in Group II (p=0.032). The difference in postoperative centroids between the two groups was also significantly different (p=0.043). Finally, the centroids of SIA were 0.12 D at 85.5°±0.50 and 0.22 D at 91.1°±0.49 for Group I and Group II, respectively, with no significance. Discussion and conclusion: A hinge incision did not have an unfavorable effect on postoperative refractive astigmatism; therefore, it may be preferred for controlled entrance to the anterior chamber, NA

INTRODUCTION[|]This study is an analysis of the cosmetic and functional results of patients who underwent keratopigmentation (KTP).[¤]METHODS[|]Sixteen eyes of 16 patients, 7 females (43.75%) and 9 males (56.25%) were included in the study. Intrastromal and superficial manual KTP were performed under general anesthesia. Patients with no light perception or with only light perception but total corneal opacification, prosthetic contact lens intolerance, or unwillingness to use a contact lens were studied. The main outcomes were postoperative patient's satisfaction, cosmetic results, pigment stabilization and surgical complications. A grading system (0-5 points) was used to assess patient satisfaction and the cosmetic results.[¤]RESULTS[|]The mean age of the patients was 30.5+-12.06 years (range: 16-53 years). Black pigment was used in 10 patients (62.5%), a brownish color in 5 patients (31.25%) and a greenish, yellow, blue, and black color pigmentation was used for 1 patient (6.25%). The mean follow-up was 29.31+-15.45 months (range: 8-52 months). In 2 of 16 patients, mild to moderate pigment loss was seen 12 months after the surgery and superficial KTP was repeated. Minimal pigment loss was seen in 5 patients, but the cosmetic results were satisfactory and no secondary surgical procedure was required. Pigment leakage underneath the conjunctiva was seen in only 1 patient. Otherwise, there were no complications associated with keratopigmentation. The postoperative mean patient satisfaction score was 4.18+-0.75 points (range: 3-5 points).[¤]DISCUSSION AND CONCLUSION[|]KTP is a safe surgical procedure that is easy to learn and perform, does not require expensive materials, and avoids more extensive and invasive reconstructive ocular procedures. Corneal KTP may have a great impact on future ophthalmic surgical practice from both therapeutic and cosmetic perspectives.[¤]

Aim: It is to review the clinical features, and surgical, and visual outcomes of rhegmatogenous retinal detachment in a pediatric population.Material and Methods: Medical records of 31 children aged 16 years old or younger with rhegmatogenous retinal detachment were retrospectively analyzed. Cases of acute retinopathy of prematurity were excluded. The data for etiologies, risk factors, prior intraocular surgery, therapeutic approach options, anatomic and functional results were evaluated.Results: Thirty-three eyes of 31 patients with RRD were evaluated. The mean patient age was 11.42±3.82 years (range 3-16). There were 26 (83.9%) males and 5 (16.1%) females. The most common etiology was trauma. At presentation 57.5% of affected eyes (19/33) had a visual acuity worse than 20/400. Preoperative retinal tear was found in 60.6% (20/33) of patients. At initial examination, proliferative vitreoretinopathy was detected in 36.3% (12/33) of patients. The most common primary operation was scleral buckle with subretinal fluid drainage (69.6%, 23/33). Anatomical reattachment was accomplished in 84.8% of cases (28/33). At the final visit, 78.78% of affected eyes (26/33) had a better visual acuity when compared to preoperative examination. In nine of affected eyes (27.27%), visual acuity was 20/200 or better. Mean follow-up time was 37.5 months (range 3-72). Conclusion: In our series, pediatric RRD occurred most commonly in association with trauma. Most eyes were anatomically reattached, and most eyes retained vision of 20/800 or better. Preserving vision in children with RRD is of great importance because of high risk of vision threatening events to the fellow eye.

Objective. To evaluate the differential diagnosis and therapy of patients who had ophthalmomyiasis externa, which is a self-limiting parasitic disease and is formed as a result of infestation of ocular surface with myiasis flies. Method. A retrospective study. Results. In our series we evaluated 12 patients attending intense eyelid edema and mimicking an acute catarrhal conjunctivitis, with symptoms of burning, stinging, itching, and increase in lacrymation as well as the sense of foreign body moving in the eye. After further biomicroscopic examination 1 – 2 mm size of mobile, black headed transparent larvae were seen. After mechanical removal of larvae from the eye, topical antibiotic and mild steroid drops were sufficient for improvement. Conclusion. We hereby want to emphasize the importance of careful examination and detailed anamnesis even in conjuncitivitis cases.