AI Article Synopsis
- The study assesses how silicone oil (SiO) impacts refractive error in dogs after treatment for retinal detachment.
- A total of 47 dogs underwent a specific surgical procedure involving SiO, with results showing varying levels of refractive error based on the eye's lens status (phakic, pseudophakic, or aphakic).
- All dogs displayed hyperopia after SiO administration, with unique observations in aphakic eyes, suggesting a need for further research to solidify the findings.
Article Abstract
Objective: To evaluate the refractive error induced by intraocular administration of silicone oil (SiO) in dogs.
Animals: 47 client-owned dogs evaluated for blindness secondary to retinal detachment.
Procedures: -3-port pars plana vitrectomy with perfluoro-octane and SiO exchange (1,000- or 5,000-centistoke SiO) was performed in 1 or both eyes for all dogs (n = 63 eyes), depending on which eye or eyes were affected. Dogs were normotensive, had complete oil filling of the eyes, and were examined in a standing position for retinoscopic examination of both eyes (including healthy eyes).
Results: The mean refractive error for SiO-filled phakic and pseudophakic eyes was 2.67 and 3.24 D, respectively. The mean refractive error for SiO-filled aphakic eyes was 6.50 D. Dogs in which 5,000-centistoke SiO was used had consistently greater positive refractive errors (mean, 3.45 D), compared with dogs in which 1,000-centistoke SiO was used (mean, 2.10 D); however, the difference was nonsignificant. There was no significant linear relationship between refractive error and the number of days between surgery and retinoscopy.
Conclusions And Clinical Relevance: Hyperopia was observed in all dogs that underwent SiO tamponade, regardless of lens status (phakic, pseudophakic, or aphakic). Aphakic eyes underwent a myopic shift when filled with SiO. Pseudophakic eyes appeared to be more hyperopic than phakic eyes when filled with SiO; however, additional investigation is needed to confirm the study findings.
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| http://dx.doi.org/10.2460/ajvr.73.8.1299 | DOI Listing |
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