Question

Which structure of the eye is correctly matched with its function?

a. cornea – regulates the amount of light entering the eye
b. lens – protects the eye
c. iris – controls the pupil
d. pupil – focuses light on the retina?

Answer 1

Answer;

C. iris – controls the pupil

Explanation;

-Iris is the diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening(pupil) .

-Cornea is the clear/transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image(admits light into the eye).

-Lens is a biconvex, transparent, flexible, a vascular structure that allows precise focusing of light onto the retina, composed of epithelium and lens fibers( lens epithelium, lens fibers)(Cloudy-Cataract;changes shape to help focus images on the retina). Pupil is black adjustable circular opening in the center of the iris through which light passes as it enters the eye.

Answer 2

Answer: c. iris – controls the pupil

Step-by-step explanation:

The iris, a structure which is primarily made up of smooth muscles. These smooth muscles surrounds the pupil. The light enters the eye through pupil which is a black hole present in the middle of the eye. It allows the light to strike the retina. It controls the size of the pupil this way it helps in regulating the amount of light entering the eye. The pupil becomes wider in the darkness and becomes narrower when the light intensity is more. These actions are controlled by iris.