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Photopic negative responses from the right (a) and left (b) eyes of a patient with LHON (A3). For comparison, representative normal recordings over a range of flash strengths (0.5–10.0 unit) have been provided (c). Pattern reversal VEPs, flash VEPs and pattern ERGs are shown for the right (d) and left (e) eyes of Patient A3 compared with representative normal recordings (f). The patient's recordings have been superimposed for all the parameters tested to demonstrate reproducibility.
