click below
click below
Normal Size Small Size show me how
chapter 15-3 eyes
Term | Definition |
---|---|
Cornea | The transparent layer forming in the eye. |
Pupil | The part of the eye that controls how much light enters the eye. |
Iris | a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center. |
Lens | Lens changes the focal distance of the eye. In other words, it focuses the light rays that pass through it. |
Retina | a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed. |
Optic Nerve | Short thick nerve that carries signals from the eye to the brain. |