| A | B |
|---|
| sclera | the "white of the eye" |
| cornea | transparent layer that covers iris and pupil |
| choroid | made from black pigment |
| retina | light is focused on this transparent membrane |
| lens | refracts or bends incoming light |
| ciliary muscle | muscle that hold lens in plae |
| iris | the muscle that controls the pupil |
| pupil | changes its size to adjust to incoming light |
| aqueous humor | fluid that maintains eye's pressure |
| vitreous humor | jelly-like substance that maintains eye's shape |
| rods | responsible for nighttime vision |
| cones | responsible for daytime vision |
| optic nerve | nerve that transports impulses to the brain |
| accommodation | process that adjusts curvature of the lens |
| conjunctiva | a protective moist mucous membrane |
