In dark adaptation, there occurs: (A) Decreased perception of vision, (B) Decreased visual acuity, (C) Pupillary dilatation, (D) Breakdown rhodopsin
Answer is C. 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