Which of the following changes occur when you walk out of bright sunshine into a poorly lit room?
(a) the pupil becomes larger
(b) the lens becomes thicker
(c) the ciliary muscle relaxes
(d) the pupil becomes smaller
the pupil becomes larger
The pupil becomes larger when you walk out of bright sunshine into a poorly lit room, to allow more light to enter the eye.
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- Human Eye: Structure of the Eye