| A | B |
|---|
| cornea | curved outer surface;protects eye and focuses most of the image |
| iris | textured, colored part of the eye; contains muscles to open/close the pupil |
| pupil | dark, circular opening in the iris |
| lens | clear, convex disk that focuses light |
| optic nerve | tough, white cord that connects the eye to the brain |
| retina | lining in the back of the eye that has light-sensitive cells; where the image is projected |
| sclera | tough white covering that gives the eye its shape |
| aqueous humor | clear, colorless fluid that holds the cornea in place |
| vitreous humor | clear, jellylike substance that fills the eye, keeping the eye's shape and the retina in place |
| ciliary muscles | fibers holding the lens in place, also bends and flexes the lens to adjust from seeing near and far |
| lacrimal gland | gland that produces tears and moistens the eye |
| tapetum | shiny, blue-green layer that reflects light in nocturnal animals |
| optic disk | area on the retina where the optic nerve attaches; there are no light-sensitive cells here |
| fovea/macula | an area on the retina packed with light-sensitive cells; provides clearest vision |
