Eye Review

Front

A ring of muscle that forms the colored portion of the eye and controls the size of the pupil.

Back

Iris

Front

Membrane that contains photoreceptors and is located in the back of the eye.

Back

Retina

Front

Opening in the center of the iris through which light enters the eye.

Back

Pupil

Front

Transparent structure behind the pupil that changes shape to help focus images on the retina.

Back

Lens

Front

Transmits visual information from the retina to the brain.

Back

Optic nerve

Tags

NGSS.MS-LS1-8

Front

Reflective layer in the eyes of many nocturnal animals causing them to shine in the dark.

Back

Tapetum lucidum

Tags

NGSS.MS-LS4-2

Front

Clear outer layer of the front of the eye.

Back

Cornea

Front

White, outermost layer of the eye that helps maintain its shape and allows for the attachment of muscles.

Back

Sclera

Front

About 120 million photoreceptor cells in the eye that detect brightness (shades of black and white).

Back

Rods

Front

About 7 million photoreceptors in the eye that detect color patterns.

Back

Cones