State one function each of iris,pupil,and cornea.

(N/A) Iris: It regulates the amount of light entering the eye by dilating the pupil in low-intensity light and contracting the pupil in high-intensity light.
Pupil: It is the aperture that allows light to enter the eye.
Cornea: It is a transparent spherical membrane covering the front of the eyeball. It acts as the primary refractive surface where light is refracted the most upon entering the eye.