Diagram of Eye Anatomy, Eyes | Quizlet

Optic Nerve

nerve that transmits visual information from the retina to the brain.

Sclera

white of the eye; outer layer of the eye

Choroid

vascular layer of the eye, containing connective tissue

Retina

third and inner coat of the eye which is a light-sensitive layer of tissue.

Lens

refracts incoming light to focus it on the retina

Iris

thin, circular, colorful structure in the eye; iris contracts and dilates involuntarily and changes the size of the pupil

Pupil

responsible for amount of light that enters eye

Cornea

transparent front part of the eye that covers the iris, pupil, and anterior chamber.

Anterior Chamber

fluid-filled space inside the eye between the iris and the cornea's innermost surface, and is filled with aqueous humor.

Vitreous Humor

jelly-like fluid that fills the space between the lens and the retina of the eyeball of humans and other vertebrates.

Ciliary Body and Muscle

Body: controls the shape of the lens, and the ciliary epithelium, which produces the aqueous humor. Muscle: controls accommodation for viewing objects

Optic Disc

small region of the eye where the nerve endings of the retina enter the optic nerve; blind spot

Posterior Chamber

narrow space behind the peripheral part of the iris

Rods

part of the retina that allows us to see dim shades such as gray and black

Cones

part of the retina that allows us to see colors

Conjunctiva

Delicate membrane lining the eyelids and covering the anterior portion of the eyeball

Accomodation

the process by which the eye's lens changes shape to focus near or far objects on the retina

ocular

pertaining to the eye

extraocular

pertaining to outside the eye

intraocular

pertaining to within the eye

refraction

bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina

visual acuity

the ability to distinguish object details and shape at a distance

cilia

hair-like projections of the eyelash

glaucoma

increased intraocular pressure results in damage to the retina and optic nerve with loss of vision

macular degeneration

breakdown or thinning of the tissues in the macula, resulting in partial or complete loss of central vision

hyperopia

farsightedness

myopia

nearsightedness

amblyopia

lazy eye

strabismus

abnormal deviation of the eye(s); cross-eyed, wall-eyed

presbyopia

impaired vision as a result of aging