Question

How does the human eye adjust itself to deal with
a. Light of different intensity
b. Objects at varying distances

Answer 1

Explanation:

The iris regulates the amount of light entering the human eye by automatically adjusting the size of the pupil according to the intensity of light that the eye receives. If the intensity of light is high, the iris contracts the pupil so as to reduce the amount of light entering the eye.

Answer 2

Answer:

a. the iris changes its size.

small size for less light absorption

big. size for more light absorption

b. in this case also the iris changes its shape