Anatomy

CONJUNCTIVA
Membrane that covers the eyeball and inner eyelids.

SCLERA
The white of the eye.

CORNEA
Clear front part of the eye that covers iris, pupil, and anterior chamber, and provides most of an eye’s optical power.

PUPIL
Opening in center of iris that regulates the amount of light that enters the eye.

IRIS
Colored tissue lying behind cornea that controls the size of the pupil.

AQUEOUS
Fluid that fills the space between the lens and the cornea, called the anterior chamber.

LENS
Clear structure that helps bring rays of light to focus on the retina.

VITREOUS
The clear gel that fills the posterior two-thirds of the eyeball.

RETINA
Part of the eye that converts images into electrical impulses sent along the optic nerve for transmission back to the brain. The retina consists of 10 layers and includes the rods and cones.

MACULA
Specialized central area of the retina responsible for central vision.

OPTIC NERVE
The cable that connects the eye to the brain, made of the nerve fibers carrying impulses from the retina to the visual cortex.

CHOROID
The vascular layer between the sclera and the retina that provides oxygen to the retina.