vision/eye
• under dark-adapted conditions, amplitude of b-wave is reduced by 27%, causing significant reduction in b-wave to a-wave amplitude ratio
• under light-adapted conditions, b-wave amplitude is reduced by 44%
• no detectable circadian rhythm of b-wave amplitude is observed, with b-wave responses apparently fixed at low amplitude at times of both high and low b-wave amplitude (circadian times CT 6 and CT 18)
• no circadian rhythm of b-wave implicit time (time between light stimulus and peak of b-wave) is detectable, whereas this is robust in controls
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