Search

Objective Procedures Results Conclusions To describe a modified ab externo method of sulcus intraocular lens (IOL) fixation and report outcomes of eyes treated with this approach.Records of patients with lens instability or luxation that underwent a lensectomy and sulcus IOL implantation from January 2004 to December 2020 were reviewed.Nineteen eyes of 17 dogs had a sulcus IOL placed via a modified ab externo approach. The median follow‐up time was 546 days (range 29–3387 days). Eight eyes (42.1%) developed POH. A total of six eyes (31.6%) developed glaucoma and required medical management long term to control IOP. The IOL position was satisfactory in most cases. Nine eyes developed superficial corneal ulcers within 4 weeks following surgery, all of which healed without complication. At the time of the last follow‐up, 17 eyes were visual (89.5%).The technique described represents a potentially less technically challenging option for sulcus IOL implantation. The success rate and complications are similar to previously described approaches. [ABSTRACT FROM AUTHOR]

Objective: To compare effects of latanoprost, a topical prostaglandin analogue (PGA) commonly used to treat glaucoma and lens instability in dogs, and latanoprostene bunod, a novel PGA with a nitric oxide‐donating moiety, on intraocular pressure (IOP) and pupil diameter (PD). Animals studied: Ten ophthalmologically normal Beagle dogs. Procedures: Dogs were treated twice a day for 5 days in a randomly selected eye with either latanoprost or latanoprostene bunod. After a 6‐week washout period, dogs were treated with the opposite drug. IOP and PD were measured at treatment times, at midday on days 1 and 5, and for 6 days post‐treatment. Results: Both drugs significantly decreased IOP and PD. At midday on day 5 of treatment, mean IOP in eyes treated with latanoprost was 4.5 mmHg lower than the fellow eye and 3.0 mmHg lower than the same eye at baseline, while mean IOP in eyes treated with latanoprostene bunod was 5.5 mmHg lower than the fellow eye and 3.6 mmHg lower than baseline. Mean PD was 0.94 mm in eyes treated with latanoprost and 0.76 mmHg in eyes treated with latanoprostene bunod. There was no significant difference between the two drugs for either parameter at that time point (p =.372 and.619, respectively, for IOP relative to control and to baseline; p =.076 for PD) or when analyzed longitudinally. Significant diurnal variation in PD was noted and may have implications for treatment of lens' instability. Conclusions: Latanoprost and latanoprostene bunod produce similar IOP reduction and miosis in normal canine eyes. [ABSTRACT FROM AUTHOR]

Background: The main options for intraocular lens (IOL) placement without capsular bag support and/or zonular weakness are iris-fixated IOL and scleral-fixated IOL (SFIOL). Purpose: To describe the surgical technique and the outcomes of intrascleral knotless zigzag suture fixation of Akreos AO60 foldable IOL. Methods: Retrospective cohort study of consecutive cases. Results: Ninety-nine eyes of 92 patients were retrospectively studied. The mean age was 72.1± 15.2 years (range 18– 94), and the median follow-up duration was 19.5 months (range 3– 81). The best-corrected visual acuity improved from a mean±SD of 1.34± 0.70 logarithm of the minimum angle of resolution (logMAR) units at baseline to 0.49± 0.56 logMAR at the end of follow-up (p< 0.001). The mean±SD final SE was − 1.24± 1.82 diopters. The mean±SD prediction error was − 0.51± 1.16 diopters. The overall perioperative complications rate was 44.4% (n=44). The rate of complications requiring invasive treatment was 19.2% (n=19). The most common perioperative complications were ocular hypertension (OHT, 20.2%, n=20), and cystoid macular edema (CME, 15.2%, n=15). The rate of IOL dislocation was 7% (n=7). Conclusion: This knotless technique avoids the risks of haptics fixation but is more prone to IOL dislocation in cases of suture deterioration. Past ophthalmic history needs to be carefully considered in candidates who underwent SFIOL implantation. [ABSTRACT FROM AUTHOR]

Abstract: Objective: To describe the presentation of 15 rabbits with naturally occurring cataracts referred for phacoemulsification surgery, the procedure in 13 cases and the follow‐up in 12. Animals included: Fifteen rabbits (30 eyes), nine of which stopped following visual cues in association with cataract progression. Materials and Methods: Rabbits underwent preoperative ophthalmic and ocular ultrasound examination. Results: Thirteen rabbits (22 eyes) had mature cataracts. Ten were bilateral and three unilateral. Two rabbits had an anterior chamber abscess. The cataract in one of these was incipient. One rabbit had bilateral immature cataracts. One rabbit had a subluxated lens, and one had a retinal detachment. Thirteen rabbits (22 eyes) underwent phacoemulsification. Eighteen, 13.5‐mm capsular tension rings (CTRs) and seventeen, 13‐mm IOLs (Acrivet®, Berlin, Germany) were fitted including one 41D 60V‐model, and three 49D and thirteen 58D 20S‐models. Intraoperative complications included one unilateral posterior‐capsular tear, one lens subluxation, and one expulsive choroidal hemorrhage. One rabbit died during anesthetic recovery. Nine cases were PCR‐tested for Encephalitozoon cuniculi, and only three were positive. The median follow‐up time was 12 months (4‐24 months). Rabbits that were not following visual cues preoperatively did so postoperatively, and surgery resulted in a clear visual axis for the follow‐up period in every case except in two, due to reasons other than the surgery. Conclusions: Phacoemulsification with CTR and IOL implantation offers good long‐term results and can improve the quality of life of pet rabbits. Retinal detachment, lens luxation, expulsive choroidal hemorrhage, and anesthetic death are potential complications. [ABSTRACT FROM AUTHOR]

Background: We encountered a rare patient with lens luxation in which the lens had become stuck on the optic disc. Findings obtained during vitreous surgery suggested that the luxated lens had become stuck on the optic disc via residual vitreous gel.Case Presentation: An 88-year-old Japanese man experienced lens luxation into the inferior vitreous cavity while undergoing treatment for glaucoma in his left eye. Because no inflammation was present upon examination, we observed the patient without prescribing any additional medications except for the eye drop treatment for glaucoma. Two years later, the patient revisited our clinic after suddenly noticing a visual disturbance in his left eye. A fundus examination revealed that the luxated lens had become stuck on the optic disc and displayed no changes in relation to the patient's head position or eye movement. Subsequently, vitreous surgery was performed to remove the luxated lens. During the surgery, we observed an aggregation of vitreous gel between the luxated lens and the optic disc. The luxated lens was successfully mobilized by pushing with a vitreous cutter and then extracted through a corneoscleral incision using perfluorocarbon liquid. At 4 months after surgery, the patient's visual acuity had improved to 20/25.Conclusions: The findings of this study suggest that the luxated lens had become stuck on the optic disc via residual vitreous gel on the optic disc. The surgical procedure of extracting the luxated lens through a corneoscleral incision using perfluorocarbon liquid was found to be both safe and effective. [ABSTRACT FROM AUTHOR]

An adult, female, captive, Matshchie's tree kangaroo was diagnosed with an anterior lens luxation in the right eye and a lens subluxation in the left eye. Both eyes were treated surgically with intracapsular lens extractions. A 360° rhegmatogenous retinal detachment was diagnosed 6 months postoperatively in the left eye. Aphakic vision was maintained in the right eye 9 months postoperatively. Based on family history and the lack of antecedent ocular disease, the lens luxations were presumed to be inherited and veterinarians should be aware of this condition within the captive tree kangaroo population. [ABSTRACT FROM AUTHOR]

Background: A 71-year-old female presented on 3 occasions with escalating pain in a congenitally blind eye. Examination revealed hypertensive uveitis with morning glory optic disc dysplasia and absence of a crystalline lens. There was no previous intraocular surgery or trauma. Intensive anti-hypertensive agents and topical steroids did not control intraocular pressure (IOP) or inflammation. Results: Dilated fundus examination on the third clinical review revealed a luxated cataractous lens on the retina. Pars plana vitrectomy and fragmatome lensectomy controlled inflammation and IOP, with resolution of ocular pain. Discussion: This is an exceptional case of phacogenic uveitis with secondary glaucoma occurring years after spontaneous crystalline lens luxation in a patient with morning glory syndrome. The embryological pathogenesis of morning glory syndrome and the significance of accelerated cataractogenesis and zonular weakness are discussed. Hypertensive uveitis with unexplained absence of a crystalline lens in a blind eye must prompt suspicion of delayed phacogenic uveitis following asymptomatic lens luxation. [ABSTRACT FROM AUTHOR]

Lens injury due to traumas may present as loss of capsule integrity, cataract, lens subluxation, or lens luxation. In addition, lens subluxation and lens luxation may occur in pseudophakic patients due to trauma. Clear corneal, scleral or sclero-corneal phacoemulsification surgery, pars plana vitrectomy, pars plana vitrectomy with phaco-fragmentation, or pars plana vitrectomy with removal through corneal incision techniques are used in the treatment of lens injury due to traumas. Intraocular lens can be implanted in the bag, sulcus, or anterior chamber during the surgery. Depending on the circumstances, scleral fixated intraocular lenses or iris-claw lenses may also be preferred. Rehabilitation of such patients is not of a great concern today, with the advanced level of vitreoretinal surgery and cataract surgery techniques and with the current state of technology. [ABSTRACT FROM AUTHOR]

Objective: To examine ultrasonographic abnormalities in eyes with traumatic hyphema obscuring intraocular structures. Design: Retrospective clinical study. Setting: The ophthalmology services of a private practice and university veterinary teaching hospital. Animals: Twenty-two dogs, 6 cats, 3 horses, and 2 birds. Measurements and main results: Medical records were reviewed for signalment, history, ophthalmic examination, ultrasonographic findings, treatment, and outcome in all patients that presented to the ophthalmology service with trauma-induced hyphema obscuring intraocular structures. Thirty-three patients were included and there were 35 affected eyes (17 left and 18 right). Abnormalities noted on ophthalmic examination included hyphema obscuring intraocular details beyond the iris (100%), corneal laceration (23%), iris prolapse (23%), fibrin clotting within the anterior chamber (17%), and subconjunctival and periocular bruising (17%). Ocular ultrasonography revealed the presence of either vitreous hemorrhage or a retinal detachment in 32 of 35 eyes (91%) with traumatic hyphema. Of the remaining 3 eyes, ocular ultrasonography revealed a lens luxation with posterior eye wall rupture in 1 eye and collapsed globes in the other 2 eyes. Twelve eyes were enucleated and 23 were treated medically. Ten of the medically treated eyes were lost to follow-up. Blindness was noted in all the affected eyes upon their final discharge and recheck examination. Conclusions: Ocular ultrasonography revealed vitreous hemorrhage or a retinal detachment in 32 eyes (91%) with traumatic hyphema. Blindness was noted on the last available examination of every eye. The prognosis for vision in an eye with traumatic hyphema obscuring intraocular detail is poor. [ABSTRACT FROM AUTHOR]

Abstract The objective of this retrospective study was to evaluate transscleral cyclophotocoagulation (TSCP) using a diode laser for treating aphakic glaucoma that developed after intracapsular lens extraction (ICLE) had been performed for displaced lenses. Records of 15 dogs (21 eyes) were reviewed. The intraocular pressure (IOP) and the presence of vision were recorded at the time of ICLE and TSCP and at 1, 3, 6–9, 12 and 24 months post TSCP. The glaucoma was considered controlled if the IOP was less than 25 mmHg. The results indicated that the effectiveness of TSCP using a diode laser for treating aphakic glaucoma was of a short-term duration (1–3 months), with three patients needing repeat TSPC. In addition, adjunctive antiglaucoma medications were often required to maintain an adequately controlled IOP. Over the 24-month period the number of dogs requiring intrascleral prosthesis, intraocular gentamicin or enucleation, or that were lost to follow-up, increased. [ABSTRACT FROM AUTHOR]