Eyes are complex sensory organs located on the face of humans and many animals. They are responsible for vision, which is the primary sense through which we perceive the world. The eyes are composed of several parts, including the cornea, iris, pupil, lens, retina, and optic nerve. The cornea is the transparent outer layer of the eye that helps to focus incoming light. Behind the cornea is the iris, which gives the eye its color and controls the size of the pupil. The pupil is the dark...