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Effect of refractive error on visual evoked potentials with pattern stimulation in dogs.

Ito Y, Maehara S, Itoh Y, Matsui A, Hayashi M, Kubo A, Uchide T - J. Vet. Med. Sci. (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan.

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.

No MeSH data available.


Related in: MedlinePlus

The graph shows the correlation between the P100 implicit time and different refractivepowers of the eye. The bars show the means at each refractive power. Significantdifferences compared with −2 D are shown by asterisks.
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fig_002: The graph shows the correlation between the P100 implicit time and different refractivepowers of the eye. The bars show the means at each refractive power. Significantdifferences compared with −2 D are shown by asterisks.

Mentions: P-VEP waveforms obtained from dog No. 6 at each refractive power. Arrows and arrowheadsindicate the N75 and P100, respectively.


Effect of refractive error on visual evoked potentials with pattern stimulation in dogs.

Ito Y, Maehara S, Itoh Y, Matsui A, Hayashi M, Kubo A, Uchide T - J. Vet. Med. Sci. (2015)

The graph shows the correlation between the P100 implicit time and different refractivepowers of the eye. The bars show the means at each refractive power. Significantdifferences compared with −2 D are shown by asterisks.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4829526&req=5

fig_002: The graph shows the correlation between the P100 implicit time and different refractivepowers of the eye. The bars show the means at each refractive power. Significantdifferences compared with −2 D are shown by asterisks.
Mentions: P-VEP waveforms obtained from dog No. 6 at each refractive power. Arrows and arrowheadsindicate the N75 and P100, respectively.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069-8501, Japan.

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.

No MeSH data available.


Related in: MedlinePlus