title: Effects of stimulus intensity for electroretinogram in conscious Miniature Schnauzers.
abstract: 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.
authors.affiliation: Department of Veterinary Surgery/Ophthalmology, College of Veterinary Medicine, Seoul National University, Gwanak-gu, Seoul, Republic of Korea.
authors.forename: Hyun-Ah
authors.initials: HA
authors.lastname: Kim
authors.forename: Man-Bok
authors.initials: MB
authors.lastname: Jeong
authors.forename: Na-Young
authors.initials: NY
authors.lastname: Yi
authors.forename: Shin-Ae
authors.initials: SA
authors.lastname: Park
authors.forename: Won-Tae
authors.initials: WT
authors.lastname: Kim
authors.forename: Se-Eun
authors.initials: SE
authors.lastname: Kim
authors.forename: Je-Min
authors.initials: JM
authors.lastname: Chae
authors.forename: Kang-Moon
authors.initials: KM
authors.lastname: Seo
mesh_terms: D000818:Animals; D003243:Consciousness; D004285:Dogs; D004596:Electroretinography / Q000662:veterinary*; D008027:Light; D015203:Reproducibility of Results; D012160:Retina / Q000502:physiology*