A) It takes about 10 to 15 minutes of complete darkness to reach maximum visual sensitivity.
B) Dark adaptation can be wiped out by just a few seconds of viewing the bluish-white xenon lights.
C) The afterimages seen after looking at a flashbulb are a result of the bleaching of visual pigment in the rods.
D) To restore ligh sensitivity, the rhodopsin in the rods must recombine.
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