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define suspensory ligaments
adjust shape of the lens
define iris
controls amount of light enters the eye (controlling size of the pupil)
define cornea
refracts light when it enters the eye
define pupil
allows light into the eye
define lens
refract light into the retina
define ciliary muscle
change shape of lens
define sclera
projects eye and maintain shape
define retina
back of eye that contains rods and cones to detect light
define optic nerve
carries electrical impulses to the brain.
what happens to the eye when its looking at something bright
circular muscle contract
radial muscle narrows
pupil gets smaller
what happens to eye when looking at a dark room
radial muscle widen
circular muscle contract
pupil expand.