The aqueous humor is a clear fluid that fills the anterior and posterior chambers between the cornea and the lens. It helps maintain intraocular pressure and nourishes the cornea and lens.
Rods are highly sensitive to low light levels and are essential for night vision. Cones, on the other hand, are responsible for color vision and function best in bright light.
The retina contains photoreceptor cells (rods and cones) that detect light and convert it into electrical impulses, which are then transmitted to the brain via the optic nerve.
The cornea is the primary structure responsible for bending (refracting) light to help focus it onto the retina. While the lens also contributes to focusing, the cornea provides the majority of the eye's refractive power.
The iris is the colored part of the eye and contains muscles that adjust the size of the pupil to control the amount of light entering the eye.