iris
Eye trauma can damage the muscle that controls pupil size.
The size of the pupil in the human eye is controlled by the iris, which is a ring of muscle that can expand or contract to adjust the size of the pupil.
The Iris.
The color ring of muscle that controls the size of the pupil is called the iris. It can expand or contract to regulate the amount of light entering the eye.
The smooth muscle in the iris of the eye controls the size of the pupil, which regulates the amount of light entering the eye. When this muscle contracts, the pupil constricts, reducing the amount of light that enters the eye, and when it relaxes, the pupil dilates to allow more light in.
it squishes it until it becomes so small that the naked eye can't see it. (he he he) (naked)
The iris is the layer that surrounds the pupil and controls the size and diameter of the pupil. It also controls the amount of light that reaches the pupil.
The eye controls the amount of light entering by adjusting the size of the pupil. In bright light, the pupil contracts to let in less light, while in dim light, the pupil dilates to allow more light to enter. The iris, which contains the pupil, is the muscle responsible for regulating the size of the pupil.
IrisThe circular muscles of the iris expand and contract the pupil. The size of the pupil determines how much light will enter the eye, so the iris effectively controls the amount of light that is passed to the retina. The iris is also responsible for eye color (blue, brown, green, hazel). See the related link below for more information on the iris.
iris
The colored part of the human eye that controls how much light that passes through the pupil is called the iris.
SmooTh muscle