PMID: 20644341Jul 21, 2010Paper

Pattern-stimulated visual evoked potential in dog: changes in elicited response with pattern size and calculation of visual acuity

The Journal of Veterinary Medical Science
Yoshiki ItohYasuharu Izumisawa

Abstract

The aim of this research was to evaluate the changes in the response of pattern-stimulated visual evoked potential (pVEP) with different pattern size, and demonstrate visual acuity from the minimum visual angle. pVEP was recorded from both eyes of six healthy beagles. Prior to pVEP recording, the dogs were sedated, and a traction fiber was used to prevent the eye from rolling down. The stimulator was set 30 cm from the subject's eye. Pattern reversal frequency of the stimulating monitor was 3 rev/sec, and pattern size was set at seven levels; 14-364 arc-min (1.2-31.4 mm). Amplitude of the P100 component was evaluated, and visual acuity was calculated from the minimum visual angle to obtain a pVEP response. A pVEP response (2.3-3.1 µV) was obtained from all subjects. The P100 component was detectable in 3 eyes with a check size of 14 arc-min and 7 eyes with 28 arc-min, and the component was undetectable with 14 arc-min in all subjects in which it was undetectable with 28 arc-min. From the minimum level to obtain the P100 component, the subjects' visual acuity was extrapolated as 0.54-2.14 cycles per degree. We demonstrated the change in P100 component with check size. However, our technique was inadequate to examine visual acuit...Continue Reading

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Citations

Mar 29, 2012·American Journal of Veterinary Research·Ron OfriChristopher J Murphy
Feb 16, 2011·The Journal of Veterinary Medical Science·Seiya MaeharaYasuharu Izumisawa
Aug 23, 2016·PeerJ·Maurizio DondiFausto Quintavalla
Dec 15, 2015·The Journal of Veterinary Medical Science·Yosuke ItoTsuyoshi Uchide
Aug 22, 2020·Veterinary Ophthalmology·Angélica M V SafatlePaula Y Sacai
Nov 7, 2014·The Journal of Veterinary Medical Science·Yosuke ItoKazuto Yamashita
Oct 5, 2018·The Journal of Veterinary Medical Science·Seiya MaeharaArisa Masuko

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