Abstract

Numerous reports have documented delays in the implicit times of the b-wave of the cone ERG in patients with retinitis pigmentosa (RP) (see ref 1 for review). Abnormalities of the cone a-wave combined with anatomical evidence have lead to the proposal that the cone ERG abnormalities are due, at least in part, to cone photoreceptor abnormalities, specifically to shortened outer segments^e.g.1-3. Other ERG evidence^e.g.4-7 is more difficult to explain by a cone receptor defect.

© 1995 Optical Society of America