This is a display of a set of 'Pattern Reversal Evoked Responses'.

There is an initial 10µV calibration, followed by 2 R Eye Whole Field responses and then 3 L Eye Whole Field responses (obviously abnormal). Then there are pairs of RRhF, RLhF, LRhF, LLhf.

There are facilities for averaging and/or superimposing sets of frames, and for comparing an average with individual frames. The cursor may be used for measuring latency, or in the case of the average display, latency and amplitude.