| A | B |
|---|
| aperture | the opening in a camera lens through which light passes to expose the film |
| diaphragm | an adjustable opening mounted between or behind the lens used to control the amount of light that reaches the film |
| film | a photographic substance coated on a flexible, transparent base that records images or scenes |
| camera Lens | one or more pieces of optical glass designed to collect and focus rays of light to form a sharp image on the film |
| pupil | an opening for light to pass into the eye |
| cornea | a tough transparent membrane on the front of the eye |
| eye lens | a transparent stucture that focuses light entering the eye |
| iris | the colored membrane that regulates the size of the opening for light |
| dark painted surface | the area that absorbs excessive light to prevent multiple images formation |
| choroid | the dark interior surface of the eye |
| retina | a delicate, light-sensitive membrane that lines the inside of the eyeball |
| eyelid | outer covering of the eye made up of skin and muscle |
| shutter | a device that opens and closes in front of the camera lens to control film exposure |
