In the human eye the central opening for the iris is _____.
A
eye lens
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B
cornea
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C
pupil
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D
ciliary body
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Solution
The correct option is C pupil The pupil is the opening in the centre of the iris where light enters the eye. The iris helps control the amount of light entering the eye by regulating the diameter of the pupil. The anterior (front) portion of the outer layer of the eye (sclera) is called the cornea. The cornea is a transparent layer where refraction of light entering the eye occurs. The ciliary body is present behind the iris and its base contains ciliary muscle. The ciliary muscle controls the shape of the eye lens for focussing.