Question

How does the eye regulate the amount of light that falls on the retina.

Answer 1

(a) Photoreceptors are cells that are sensitive to light. ... (c) Pupil is the small aperture in the iris that regulates the amount of light entering the eye. Cornea, aqueous humour, lens, and vitreous humour act together and refract light rays, focussing them onto the photoreceptor cells of the retina.

Answer 2

Answer:

The eye regulates the amount of light that falls on the retina with the help of pupil and Iris.

Explanation:

The iris is the ring of pigmented tissue present in the eyes that encompass the pupil that changes in shading. The amount of light entering the eyes is solely dependent on the opening and closing of iris.

The pupil is the opening in the focal point of the iris where light enters the eye. When taking a gander at the eye, the pupil seems dark. In diminish light; the opening in the focal point of the iris extends to enable all the more light to enter the pupil. In brilliant light, this opening chokes to diminish the measure of light entering the eye to shield it from harm.