Question

Which of the following controls the amount of light entering the eye ?; A. ciliary muscles; B. lens; C. iris; D. cornea

Answer 1

Answer:

The correct answer of this question is option C,iris.

Explanation:

Iris is the small circular opening of the human eye's lens which can change it's diameter in order to control the amount of light entering in the eye's internal portion.

This helps to adjust the eye sight according to the environmental lighting conditions.

That's why option C is the correct answer of this question.