[3 years follow-up of the ERG in retinal degeneration].
D000293:Adolescent; D000328:Adult; D002648:Child; D004596:Electroretinography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012174:Retinitis Pigmentosa / Q000503:physiopathology*; D013997:Time Factors