The human eye has several key structures:

Cornea:

The transparent, curved outermost layer that helps focus light onto the retina.

Iris:

The colored part of the eye that controls the size of the pupil to regulate the amount of light entering the eye.

Pupil:

The black center of the iris that expands or contracts to control the amount of light entering the eye.

Lens:

A clear, flexible structure behind the iris that further focuses light onto the retina.

Retina:

The innermost layer at the back of the eye, containing photoreceptor cells (rods and cones) that convert light into electrical signals.

Optic Nerve:

A bundle of nerve fibers that carries these electrical signals from the retina to the brain.

Macula:

A small, specialized area in the central retina responsible for high-detail vision.

Sclera:

The white, tough outer layer of the eye that helps maintain its shape.

Vitreous Humor:

A clear gel-like substance that fills the space between the lens and the retina, helping to maintain the eye’s shape.

These structures work together to allow us to perceive the visual world around us.