A patient comes to the emergency department after a boxing match, and his O.S. is almost swollen shut. He has bruises on his face and neck. He says he is worried because he "can't see well" from his O.S. The physician suspects retinal detachment. What finding would support this suspicion?

A) Loss of central vision
B) Loss of peripheral vision
C) Sudden loss of pupillary constriction and accommodation
D) Shadow or diminished vision in one quadrant or one half of the visual field