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Nutritional cataracts in a wolf litter treated by phacoemulsification.
Veterinary Ophthalmology 2024 March 19
OBJECTIVE: To describe the clinical findings in a wolf litter with nutritional cataracts and determine the treatment outcomes after phacoemulsification.
PROCEDURE: Bilateral nutritional cataracts were diagnosed in four hand-fed 10-week-old wolves (Canis lupus). The information collected included signalment, physical and ophthalmic examination findings, ocular ultrasonography and electroretinography results, and postoperative outcomes.
RESULTS: All four wolves were rejected from the dam and hand raised with a commercial artificial milk replacer from 5 days of age until weaning at 6 weeks of age. At initial presentation, bilateral cataracts were observed in all patients (8/8 eyes), with vision deficits in three of the four wolves. The main ophthalmic anomalies were mature cataracts with lens-induced uveitis (3/8 eyes, two wolves), immature cataracts (1/8 eyes, one wolf), and perinuclear and posterior cortical/subcapsular lens opacities (4/8 eyes, three wolves). Three of the four wolves (six eyes) underwent bilateral one-handed phacoemulsification with intraocular lens implantation. At the last examination 2 months following surgery, all operated eyes (6/6) were visual, Elschnig pearl proliferation was present in 2/6 eyes, and mild posterior capsular opacification was observed in 6/6 eyes. In the nonoperated wolf, the cataracts remained stable and did not affect the visual axis of either eye.
CONCLUSIONS: This is the first description of phacoemulsification surgery in wolves. Phacoemulsification is a viable treatment option for captive wolves with nutritional cataracts. Special attention should be paid to hand-raised cubs to ensure that adequate amino acid levels are present in artificial milk.
PROCEDURE: Bilateral nutritional cataracts were diagnosed in four hand-fed 10-week-old wolves (Canis lupus). The information collected included signalment, physical and ophthalmic examination findings, ocular ultrasonography and electroretinography results, and postoperative outcomes.
RESULTS: All four wolves were rejected from the dam and hand raised with a commercial artificial milk replacer from 5 days of age until weaning at 6 weeks of age. At initial presentation, bilateral cataracts were observed in all patients (8/8 eyes), with vision deficits in three of the four wolves. The main ophthalmic anomalies were mature cataracts with lens-induced uveitis (3/8 eyes, two wolves), immature cataracts (1/8 eyes, one wolf), and perinuclear and posterior cortical/subcapsular lens opacities (4/8 eyes, three wolves). Three of the four wolves (six eyes) underwent bilateral one-handed phacoemulsification with intraocular lens implantation. At the last examination 2 months following surgery, all operated eyes (6/6) were visual, Elschnig pearl proliferation was present in 2/6 eyes, and mild posterior capsular opacification was observed in 6/6 eyes. In the nonoperated wolf, the cataracts remained stable and did not affect the visual axis of either eye.
CONCLUSIONS: This is the first description of phacoemulsification surgery in wolves. Phacoemulsification is a viable treatment option for captive wolves with nutritional cataracts. Special attention should be paid to hand-raised cubs to ensure that adequate amino acid levels are present in artificial milk.
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