The coloured portion of the eye that contracts or expands depending on the amount of light striking it is the
A)pupil.
B)lens.
C)iris.
D)cornea.

Question

Quizplus · Accepted Answer

The iris is the coloured portion of the eye that surrounds the pupil and is responsible for controlling the amount of light that enters the eye by contracting or expanding. The pupil is the black circular opening in the centre of the iris through which light enters the eye, but it does not have the ability to control its size. The lens sits behind the iris and is responsible for focusing light onto the retina, while the cornea is the clear outer layer that protects the eye and helps to focus light entering the eye.

The Coloured Portion of the Eye That Contracts or Expands