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Dark adaptation time in canine electroretinography using a contact lens electrode with a built-in light source |
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| Authors: | Seiya MAEHARA Yoshiki ITOH Sho HOSHINO Miri HAYASHI Yosuke ITO |
| Institution: | 1)Department of Small Animal Clinical Sciences, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai-Midorimachi, Ebetsu, Hokkaido 069–8501, Japan;2)Department of Veterinary Radiology, Joint Faulty of Veterinary Medicine, Yamaguchi University, 1677–1 Yoshida, Yamaguchi, Yamaguchi 753–8515, Japan |
| Abstract: | The purpose of this study was to evaluate the dark adaptation time in canine electroretinography (ERG) using a contact lens electrode with a built-in LED. Twelve eyes of six normal laboratory beagle dogs were used and exposed to steady room light at 500 lux for 30 min for light adaption. ERG was recorded at different time points during dark adaptation in sedated and light-adapted beagles. The stimulus intensity was 0.0096 cd/m2/sec. The b-wave amplitude increased significantly until 25 min of dark adaptation, whereas no significant changes in amplitudes were observed after 30 min. Dark adaptation for more than 25 min would be necessary for accurate ERG in canine ERG using a contact lens electrode with a built-in LED. |
| Keywords: | canine dark adaptation electroretinogram |