<prompt> In dark adaptation, there occursDecreased perception of visionDecreased visual acuityPupillary dilatationBreakdown rhodopsin  <response>: Dark adaptation The physical and chemical adjustments of the eye, including dilation of the pupil and increased activity of rods in the retina, that make vision possible in relative darkness.Ref: Ganong;s review of medical physiology, 23rd edition Page no: 171 