| A | B |
|---|
| cornea | the transparent front surface of the eye |
| pupil | the openingin the center ofthe iris through which light enters the inside of the eye |
| iris | the ring of muscle that controls the size of the pupil and gives the eye its color |
| retina | the layer of cells thatlines the inside of the eyeball |
| rods | cells in the retina that detect dim light |
| cones | cells in the retina that respond to and detect color |
| optic nerve | short, thick nerve that carries signals from the eye to the brain |
| nearsighted | a condition that causes a person to see distant objects as blurry |
| farsighted | a condition that causes a person to see nearby objects as blurry |
