Effect of accommodation on visually evoked response.
Accommodation causes variation in both visually evoked response (VER) amplitude and implicit time. Measurements indicate an average decrease in amplitude of about 1 muV per diopter and an increase in implicit time of about 1.5 msec per diopter for increasing amounts of accommodation. Care should be taken to eliminate any accommodative stimulus which could alter the normal VER response during clinical evaluation.
D000065:Accommodation, Ocular; D000328:Adult; D005074:Evoked Potentials, Visual; D006801:Humans; D008875:Middle Aged; D010775:Photic Stimulation / Q000295:instrumentation / Q000379:methods