Effects of stimulus intensity for electroretinogram in conscious Miniature Schnauzers.
The aim of this study was to determine the most effective light intensity for flash electroretinogram (ERG) examination in conscious dogs using ERG equipment with a contact lens electrode with a built-in LED light source. ERG was performed on the bilateral eyes of ten clinically healthy Miniature Schnauzers at 6 different intensities (0.025, 0.079, 0.25, 0.79, 2.5 and 7.9 cd.s/m2) after dark adaptation for 20 min. With the increase in stimulus intensity, the most significant increase in a and b-wave amplitudes were observed at 2.5 cd.s/m2 (p<0.05). As the intensity of light was increased, the implicit times of both waves significantly decreased. Therefore, the most effective intensity of stimulus was 2.5 cd.s/m2 in the conscious Miniature Schnauzers. This suggests that this procedure would be applicable for evaluation of retinal function in conscious dogs, especially in high-risk patients.
Kim
Hyun-Ah
HA
Department of Veterinary Surgery/Ophthalmology, College of Veterinary Medicine, Seoul National University, Gwanak-gu, Seoul, Republic of Korea.
Jeong
Man-Bok
MB
Yi
Na-Young
NY
Park
Shin-Ae
SA
Kim
Won-Tae
WT
Kim
Se-Eun
SE
Chae
Je-Min
JM
Seo
Kang-Moon
KM
D000818:Animals; D003243:Consciousness; D004285:Dogs; D004596:Electroretinography / Q000662:veterinary*; D008027:Light; D015203:Reproducibility of Results; D012160:Retina / Q000502:physiology*