Answer:
In dim light, your pupil expands to allow more light to enter your eye. In bright light, it contracts. Your pupil can range in diameter from 1/16 inch (1.5 mm) to more than 1/3 inch (8 mm). Light detected by the retina of your eye is converted to nerve impulses that travel down the optic nerve.
pupil become large in dim light, so that more and more light can enter in eyes. pupil become smaller in bright light, to reduce the amount of light enter in eyes. Pupil becomes larger in dim light, so that more and more light can enter in the eyes.
