Safatle AMV, de Moraes TA, Eyherabide AR, Fernandes AG, Jorge JS, Carvalho LMCR, Rodriguez EAK, Otsuki D, Bolzan AA, Sacai PY. Grating Visual Acuity in phakic, aphakic, and pseudophakic Poodles.
Vet Ophthalmol 2020;
23:879-883. [PMID:
32820863 DOI:
10.1111/vop.12813]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE
To compare the grating visual acuity (VA) measured by visual evoked potentials (VEP) in phakic, aphakic, and pseudophakic Poodles.
ANIMALS STUDIED
Thirty-six Poodle dogs aged from 4 to 14 years.
PROCEDURES
Animals were allocated into three different groups according to their lens status: phakic group (n = 12), aphakic group (n = 12), and pseudophakic group (n = 12). Grating VA was measured in cycles/degree (cpd) in all animals using the electrodiagnosis system Roland RETIport® in a dark room without using any mydriatic, sedative, or anesthetic drugs.
RESULTS
The mean grating VA in the phakic, aphakic, and pseudophakic groups was 5.9 ± 1.0 cpd (20/102-Snellen equivalent), 2.6 ± 0.7 cpd (20/231), and 5.2 ± 1.1 cpd (20/116), respectively. The VA from aphakic eyes was significantly lower when compared to the phakic and pseudophakic eyes (P < .05). There was no significant difference in VA between phakic and pseudophakic eyes.
CONCLUSIONS
The VEP is a useful tool for the evaluation of grating visual acuity in canines. The study showed that IOL implantation following phacoemulsification results in improved VA as measured by VEP compared to that of the aphakic eye and resulted in VA that was similar to that of the normal eye.
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