Question

describe pupils and its function.​

Answer 1

Pupil: The opening of the iris. The pupil may appear to open (dilate) and close (constrict), but it is really the iris that is the prime mover; the pupil is merely the absence of iris. The pupil determines how much light is let into the eye. Both pupils are usually of equal size.

Answer 2

Answer:

The function of the pupil is clearly that of controlling the amount of light entering the eye, and hence the light reflex.

or

The colored part of the eye which helps regulate the amount of light entering the eye. When there is bright light, the iris closes the pupil to let in less light. And when there is low light, the iris opens up the pupil to let in more light. Focuses light rays onto the retina.