When you first wake up in the morning and turn your lights on, the _______________ changes shape to keep out some of the light so it does not damage the eye.
A)retina
B)cornea
C)iris
D)sclera

Question

Quizplus · Accepted Answer

The iris controls the size of the pupil (the black circular opening in the center of the eye) which regulates the amount of light that enters the eye. When light intensity increases, the iris will constrict the pupil to reduce the amount of light entering the eye and protect the retina from potential damage.

When You First Wake Up in the Morning and Turn