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ERG a-wave amplitude by age and retinal lesion status. Measures are from a dark-adapted dog, in response to a stimulus of 13.2 log photons/cm2/s (10cd.s/m2). No statistically significant differences exist amongst the groups. However, due to the limited number of dogs available the statistical power of the comparison was too low to rule out the possibility that the severity of the lesions did affect the ERG a-wave.
