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Eye Vocabulary
Term | Definition |
---|---|
Cornea | Transparent covering that allows light to enter the eye; on a preserved specimen, the cornea is cloudy. |
Optic Nerve | Bundle of nerve cells that send signals from the eye to the brain. |
Aqueous Humor | Clear fluid filling the area between the lens and the cornea, composed mostly of water. |
Vitreous Humor | Viscous fluid that fills the vitreous body; helps maintain the shape of the eyeball. |
Retina | Light-sensitive portion of the eye composed of receptor cells called cones and rods. |
Tapetum Lucidum | Iridescent portion of the choroid tissue; helps in night vision by reflecting available light back onto the retina. |
Lens | Biconvex transparent structure that focuses the light coming in through the cornea and pupil. |
Iris | Diaphragm that regulates the size of the pupil. |
Pupil | Opening through which light enters the eye. |
Sclera | Outer covering of the eyeball; a tough, opaque sheet of connective tissue that protects inner structures of the eyeball and helps maintain rigidity. |
Choroid | Thin, dark sheet of tissue between the retina and the sclera. |