Abstract
Pattern reversal electroretinograms (PERGs) in response to 30' checks and 6 degree checks were recorded from 60 eyes of 30 normal healthy individuals aged between 20 and 78 years. Results were assessed to show age changes in the amplitudes and latencies of the PERGs, the ratio of 30' to 6 degree PERG amplitude, the 'N95/P50' ratio and the inter-eye ratio of the 30' PERG. The positive component of the PERG decreases in amplitude and increases in latency with increasing age. In addition, it was found that the 30' PERG/6 degree PERG ratio decreases, the N95/P50 ratio increases and the inter-eye ratio shows a greater difference between the two eyes in the older subjects.
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