Figure 2.

Electroretinograms; 2a, 2c and 2e: dark adaptation, blue light scotopic stimuli. 2b, 2d and 2f: dark adaptation, white light stimuli. 2a and 2b: 2 years old unaffected male. 2c and 2d: 3 years old affected male with isolated lesions. 2e and 2f: 9 years old affected dog with generalized lesions.