1996 Volume 15 Issue 3-4 Pages 3-4_103-3-4_113
Electroretinography was performed on 14 eyes of 7 captive alligators (Alligator mississippiensis), free of ocular disease. The alligators were subjected to nine flash stimuli of increasing light intensity following dark adaptation for 30 minutes. No significant difference (p=0.12) between left and right eye responses was observed, thus allowing pooling of the results. The Naka Rushton model equation was used to describe the scotopic b wave response via mixed effects non-linear regression (Rmax=166±29μV, n=0.27±0.06 and k=2.0±3.0 fL sec). No second limb of the luminance response curve occurred. At higher intensities, oscillatory potentials were present. Rod recovery time was less than 30 seconds. Implicit time did not decrease with increasing stimulus intensity. These pooled values may serve as the baseline for comparative studies.
