Fig. 2. Waveforms and response versus intensity curves for compound action potential (CAP) and electroretinogram (ERG) recording. (A) CAP waveforms (`ON' responses) at increasing intensities. Note that individual traces for A and B were vertically displaced for clarity of presentation. Intensity was incremented in 0.2 log unit steps of a 360 nm linearly polarized stimulus with an e-vector orientation of 45°. (B) ERG waveforms at increasing intensities recorded from a control fish (sham control, intraocular injection of saline). (C) Response versus intensity curve based on CAP data taken from panel A. (D) Response versus intensity curve based on ERG data taken from B.