Structure of the Human Eye

sclera

The white part of the eye that surround the eyeball and helps maintain it's shape. It has tiny blood vessels

Cornea

A transparent lens covering the eye

lacrimal glands

the gland that produces tears and located in the backside of the upper eye

Iris

Ether blue or brown- made up of cirucular muscles used to make the pupil smaller in bright light and larger in dim light

Pupil

Dark circular opening in the center of the iris

ciliary muscles

a ring of delicate fibers used the hold the lens in place

aqueous humor

behind the cornea

Lens

behind the iris, a clear convex disk that helps the cornea focus light coming into the eye

vitreous humor

clear jelly like sphere that holds the internal structure of the eye in place and maintains the shape of the eye

Retina

a translucent layer of tissue in the back of the eye, forms images and sends to the brain for processing

choroid

the pigmented vascular layer of the eyeball between the retina and the sclera

macula

an oval yellowish area surrounding the fovea near the centre of the retina in the eye, which is the region of keenest vision

fovea

a small depression in the retina of the eye where visual acuity is highest. The centre of the field of vision is focused in this region, where retinal cones are particularly concentrated

optic disk

the raised disc on the retina at the point of entry of the optic nerve, lacking visual receptors and so creating a blind spot.

blind spot

the point of entry of the optic nerve on the retina, insensitive to light.

optic nerve

each of the second pair of cranial nerves, transmitting impulses to the brain from the retina at the back of the eye.

Optic chaism

Joins the optic nerve to the eyes, where nerve fibers cross