Retinal function in high refractive error assessed electroretinographically.
The retinal function of patients with high refractive error was studied electroretinographically. Thirty-one hypermetropic patients, 7 myopic patients, and 7 patients with either unilateral or bilateral aphakia participated in the study. The ERG responses were measured in the light- and dark-adapted states. It was found that myopic eyes were characterised by subnormal amplitude but normal pattern, expressed by normal relationship between the b-wave amplitude and the a-wave amplitude. In aphakia the ERG responses were of normal amplitude and pattern. However, the hypermetropic patients could be divided into 3 groups. One group included subjects with a subnormal b-wave to a-wave relationship. The second group was characterised by a normal b- to a-wave relationship, while patients belonging to the third group exhibited supernormal b-wave to a-wave relationship. This classification of hypermetropic subjects did not correlate with the axial length of the eye or the refraction of the ocular media.
D000293:Adolescent; D000328:Adult; D001036:Aphakia, Postcataract / Q000503:physiopathology; D002648:Child; D004596:Electroretinography; D006801:Humans; D006956:Hyperopia / Q000145:classification / Q000503:physiopathology; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology; D012030:Refractive Errors / Q000503:physiopathology*; D012160:Retina / Q000503:physiopathology*