The Human Eye

regulates how much light enters the eye

• cornea

• iris

• sclera

contains millions of light receptor cells called rods and cones

• retina

• optic nerve

• lens

begins the process of refracting light that enters our eye

• lens

• pupil

• cornea

the whites, outer, protective layer of your eyeball

• eyelid

• sclera

• cornea

the opening in our eyes which change shape depending on the movement of the iris

• optic nerve

• lens

• pupil

the pathway through which electrical impulses send visual images to our brain

• canal of schlem

• blood vessels

• optic nerve

changes shape to allow us to focus near and far and near again

• lens

• cornea

• iris

eyelids, eyelashes and eyebrows help to protect our eyes

• true

• false

the number of muscles that are responsible for moving our eyes up and down, side to side, and around

• 4

• 6

• 8

farsighted means your eye sees items far away better than items that are close

• true

• false