Sclera
location: outer layer of the eye
function: protects and supports eyeball
Cornea
location: transparent portion of sclera
function: refracts and focuses light rays
Choroid
location: middle layer of eye
function: absorbs stray light rays
Retina
location: inner layer of eye
function: contains receptors for sight
Rod Cells
location: in retina
function: make black and white vision possible
Cone Cells
location: concentration in fovea centralis
function: make color vision possible
Fovea Centralis
location: special region of retina
function: makes acute vision possible
Lens
location: interior of eye between cavities
function: refracts light rays
Ciliary Body
location: extension from choroid
function: holds lens in place; functions in accommodation
Iris
location: more anterior extension of choroid
function: regulates light entrance
Pupil
location: opening in middle of iris
function: admits light
Humors (Aqueous and Vitreous)
location: fluid media in anterior and posterior compartments, respectively, of eye
function: transmit and refract light rays, support eyeball
Optic Nerve
location: extension from posterior of eye
function: transmit impulses to the brain