Describe the pathway of light from the point where it enters the eye to the point in which the light information travels to the brain. Briefly describe the structure and function of each organ along the pathway.
Light enters the eye through the cornea, which is the transparent outer layer of the eye. The light then passes through the pupil, which is the opening in the center of the iris. The iris is the colored part of the eye that controls the amount of light that enters the eye. The light then passes through the lens, which focuses the light onto the retina. The retina is a light-sensitive layer of tissue at the back of the eye that contains photoreceptor cells. These cells convert the light into electrical signals that are sent to the brain via the optic nerve. The optic nerve is a bundle of nerve fibers that carries the electrical signals from the retina to the brain. The brain then interprets the signals and creates an image.
