A Period of Adjustment is Required When Moving from a Dark

Question

A period of adjustment is required when moving from a dark room into bright light because
A) the breakdown of rhodopsin to opsin occurs slowly.
B) the lens requires time to accommodate dim light.
C) rods exposed to strong light need time to regenerate rhodopsin.
D) rhodopsin does not function in dim light.
E) only cones function in dim light.

Accepted Answer

Rods, which are responsible for vision in low light, contain the pigment rhodopsin. When moving from a dark to a bright environment, the intense light causes a rapid breakdown of rhodopsin. As a result, when returning to a darker environment or initially adjusting to bright light, the rods require time to regenerate rhodopsin to function effectively again.