muscles and structures of the eye

sclera

tough outer layer of the eye; maintains shape and protects from injury

cornea

outer lens of the eye; helps focus light on the retina

choroid

contains blood vessels

ciliary body

ligaments that change the shape of the lens when focusing

iris

area of the eye that controls the size of your pupil

pupil

opening at the front of the eye that allows light to enter your inner eye

retina

contains light receptors; serves as the integration point for the nervous system

fovea centralis

area of concentrated light receptors; allows for acute focus

optic nerve

nerve exiting the eye and delivering optical signals to the brain

lens

focuses light to the retina

aqueous humor

fluid found in the forward chamber of the eye that helps keep a pressurized state

vitreous humor

fluid found in the rear chamber of the eye that helps keep a pressurized state

superior oblique

moves the eye in down and out positions

superior rectus

elevates the eye; “looking up”

inferior rectus

depresses the eye; “looking down”

lateral rectus

moves the eye laterally; “looking side to side”

medial rectus

moves the eye laterally; “cross eyed”

inferior oblique

extortion, elevation, and abduction of the eye