EYE

Sclera

White, opaque tough covering, has capillaries-blood supply &o2 to sclera

Cornea

Protects the pupil &iris/positioned in front of both

lacrimal glands

almond-shaped exocrine glands, one for each eye, that secrete the aqueous layer of the tear film.

Iris

Circular muscles surrounding the pupil, it can have lighter colors in the iris do to lack of melanin or pigment which gives the body, hair, and eyes there color. Help regulate the amount of light entering the eye

Pupil

Is an opening in the middle of the eye, oemsitive to light. It regulates the amount of light entering the eye with the help of the iris

ciliary muscles

These relax & contracts to change shape of the lens - these adjustments are called Accommodating

AH - aqueous humor

A liquid the nourishes the iris, pupil, and the cornea

Lens

Cortex shaped disc help in place by cilariy muscles

vitreous humor

the transparent jellylike tissue filling the eyeball behind the lens.

retina

a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

choroid

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

macula

an oval yellowish area surrounding the fovea near the center 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 center of the field of vision is focused in this region, where retinal cones are particularly concentrated.

optic disk

the raised disk 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.