The eye is the organ responsible for vision, allowing us to perceive light and form images. It consists of several key structures: the cornea (transparent outer layer that focuses light), the pupil (the opening that controls the amount of light entering), the lens (focuses light onto the retina), and the retina (contains light-sensitive cells that convert light into electrical signals). These signals are sent to the brain via the optic nerve. The iris controls the size of the pupil and determines eye color. The eye also has protective features, like eyelashes, eyebrows, and tears, to help keep it clean and moist. The eye plays a crucial role in vision, helping us navigate and interpret the world around us.