parts of eye

Cornea

Clear outer layer that protects the eye and bends light.

Pupil

Adjustable opening in the center where light enters.

Iris

Colored muscle surrounding pupil that controls its size.

Lens

Transparent structure behind pupil that focuses light on retina (accommodation).

Retina

Back surface containing photoreceptors (rods and cones) that convert light into neural signals.

Rods

Photoreceptors for black/white vision, low light, and peripheral vision.

Cones

Photoreceptors for color vision and fine detail (fovea contains only cones).

Fovea

Central focal point in the retina with the sharpest vision.

Optic Nerve

Nerve carrying visual signals from the eye to the brain (thalamus/occipital lobe).

Blind Spot

Point where optic nerve leaves the eye (no rods or cones).