Function of iris is to:

Function of iris is to: Correct Answer Alter the size of pupil

Explanation:

Iris, by regulating the size of pupil, allows light to pass only through the center of the lens, which is optically the most effective part.

Related Questions

What is the function of an important part of the human eye, the iris?
Which of the following is the function of Iris?
What is the function of Iris?
Match the following and mark the correct option A. Cornea (i) Changes focal length of eye lens B. Iris (ii) Forms image C. Ciliary muscles (iii) Give distinct color to eye D. Retina (iv) Protects eyes
The muscles of the iris control 
Iris is present behind the