title: Effect of refractive error on visual evoked potentials with pattern stimulation in dogs.
abstract: The purpose of this study was to investigate the effects of refractive error on canine visual evoked potentials with pattern stimulation (P-VEP). Six normal beagle dogs were used. The refractive power of the recorded eyes was measured by skiascopy. The refractive power was corrected to -4 diopters (D) to +2 D using contact lens. P-VEP was recorded at each refractive power. The stimulus pattern size and distance were 50.3 arc-min and 50 cm. The P100 appeared at almost 100 msec at -2 D (at which the stimulus monitor was in focus). There was significant prolongation of the P100 implicit time at -4, -3, 0 and +1 D compared with -2 D, respectively. We concluded that the refractive power of the eye affected the P100 implicit time in canine P-VEP recording.
authors.affiliation: Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Ito
authors.forename: Seiya
authors.initials: S
authors.lastname: Maehara
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Itoh
authors.forename: Ai
authors.initials: A
authors.lastname: Matsui
authors.forename: Miri
authors.initials: M
authors.lastname: Hayashi
authors.forename: Akira
authors.initials: A
authors.lastname: Kubo
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Uchide
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000503:physiopathology*; D004285:Dogs; D005074:Evoked Potentials, Visual; D005260:Female; D008297:Male; D010364:Pattern Recognition, Visual; D012030:Refractive Errors / Q000662:veterinary*; D042262:Retinoscopy / Q000662:veterinary