Eye Anatomy

Front 1

Label 1-16

Back 1

Back (Definition)

Front 2

Lateral rectus

Back 2

Moves the eye away from the nose

Front 3

Medial rectus muscle

Back 3

Most powerful of extraocular muscles, turns eye toward the nose

Front 4

Fovea centralis

Back 4

Area in the macula where visual acuity is sharpest. Contains high number of cones

Front 5

Iris

Back 5

Colored part of the eye

Front 6

Lens

Back 6

Transparent structure of the eye that focuses light by the curvature of its surface.

Front 7

Optic disk

Back 7

Portion of the optic nerve that is formed by meeting all the retinal nerve fibers. Insensitive to light, corresponds to blind spot.

Front 8

Optic nerve

Back 8

Carries impulses from retina to brain. Transmits the signals from rods and cones to brain.

Front 9

Retina

Back 9

Seeing part of the eye. Retina lines the sclera and is the place where light coming into the eye is focused.

Front 10

Sclera

Back 10

White portion of the eye that gives shape and structure to the eyeball

Front 11

Vitreous humor

Back 11

Thick clear jelly-like substance that fills the eye btn the lens and retina. Supports the retina and keeps the eye round.

Front 12

What are Rods and cones?

Back 12

Photoreceptors.

Rods-black and white vision and nighttime vision as well as peripheral and motion detection

Cones-color vision and daytime vision and clear central vision

Front 13

Suspensory ligaments

Back 13

Long thin fibers that connect the crystalline lenses to the ring of ciliary muscles

Front 14

Fundus

Back 14

Bottom/base of an organ. For the eye t refers to the interior surface of the eyeball

Front 15

Choroid

Back 15

Blood vessels that nourish the retina so that it can function. Located between the sclera and retina

Front 16

Ciliary muscle

Back 16

Muscle that alters the shape of the crystalline lens. It has direct control over focusing ability of the eye.

Front 17

Conjunctiva

Back 17

Clear cellophane like tissue that covers the sclera and inside surface of the eyelids.

Front 18

Cornea

Back 18

Transparent tissue located on the very front of the eye. Most powerful refractive media of the eye and provides most of the eyes ability to focus light.

Front 19

Anterior chamber

Back 19

Located behind the cornea and in front of the iris. It’s filled with fluid called aqueous humor

Front 20

Aqueous humor

Back 20

Watery Fluid produced by ciliary body and provides nutrients for the lens and posterior cornea and carries away waste. Maintains intraocular pressure.

Front 21

Crystalline lens

Back 21

Provides focusing power to the eye. Allows adjustments from distance to near objects and is the second most powerful refractive medium.