Answer briefly: (c) How does the eye regulate the amount of light that falls on the retina
The eye is a sense organ used for the purpose of vision. Rods and cones are two types of photoreceptors present in the retina of the eye. The size of the pupil regulates the amount of light entering the eye. In presence of bright light the pupil contracts to limit the amount of light entering the eyes. In presence of dim light, the pupils dilate to increase the amount of light entering the eyes.Final Answer The part of the eye i.e. pupil regulates the amount of light entering the eye by contracting and dilating its size. In the presence of bright light the pupil contracts while in the presence of dim light, the pupils dilate to increase the amount of light entering the eyes.
