Abstract

The electroretinogram (ERG) has been shown to be an excellent predictor of outcome in central retinal vein occlusion (CRVO), distinguishing with high sensitivity and specificity those eyes that will develop neovascularization of the iris (NVI) from those that will not (no-NVI).¹-⁶ Although few of these studies agree on the parameter that best separates NVI eyes from no-NVI eyes, most of the parameters investigated in these studies (R_max and log K from Naka-Rushton analysis, 30 Hz flicker implicit time and amplitude, b-wave to a-wave amplitude ratio, b-wave implicit time) perform well in separating the two groups. Examination of the relationships between these parameters show that most of them are correlated.^* This leads to the question "Are all of these parameters measuring the same underlying phenomenon (with varying degrees of noise added), or are some of them measuring different things?"

© 1992 Optical Society of America