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sight and haering
| Term | Definition |
|---|---|
| cornea | the transparent layer forming the front of the eye. |
| pupil | The opening of the iris. |
| iris | a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening pupil in the center. |
| lens | By changing its shape, the lens changes the focal distance of the eye. |
| 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. |
| rods | A type of specialized light-sensitive cell photoreceptor in the retina of the eye that provides side vision and the ability to see objects in dim light night vision. |
| cones | A type of specialized light-sensitive cell photoreceptor in the retina of the eye that provides color vision and sharp central vision. |
| optic | any of the elements as lenses, mirrors, or light guides of an optical instrument or system —usually used in plural b : an optical instrument. |
| nerve | |
| eardrum | |
| hammer | |
| anvil | |
| stirrup | |
| cochlea | |
| semicircular canals |
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victoria.
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