Eye Structure and Functions

Front

What is the function of the optic nerve?

Back

Carries electrical impulses away from the eye to the brain.

Front

What are photoreceptors?

Back

Cells in the retina that become stimulated when light waves strike them.

Front

What gives the eye its overall shape?

Back

The sclera, which is the white outer layer of the eyeball.

Front

What is the pupil?

Back

A hole in the eye that changes in size based on the amount of light present.

Front

What is the function of the iris?

Back

Controls the size of the pupil and thus the amount of light entering the eye.

Front

What is the role of the cornea?

Back

The transparent front part of the eye that helps to focus light.

Front

What is the lens of the eye?

Back

A flexible structure that changes shape to help focus light onto the retina.

Front

What is the function of the ciliary body?

Back

Moves the lens by contracting and/or relaxing.

Front

What is the anterior chamber of the eye?

Back

The space between the cornea and the iris filled with aqueous humor.

Front

What is the vitreous humor?

Back

A gel-like substance that fills the space between the lens and the retina.