Across
- 4. the adjustable opening in the center of the eye through which light enters
- 5. the light sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
- 6. retinal receptors that are concentrated near the center of the retina and that function in daylight/well-lit conditions, give detail and color sensations
- 8. a depth cue available to either eye alone
- 9. the process by which the eye’s lens changes shape to focus near or far objects on the retina
- 12. nerve cells in the brain’s visual cortex that respond to specific features of the stimulus, such as shape, angle, and movements
- 13. the point at which the optic nerve leaves the eye, creating a blind spot because no receptor cells are located there
- 15. retinal receptors that detect black, white, and gray, and are sensitive to movement
Down
- 1. theory that opposing retinal processes enable color vision
- 2. a depth cue that depends on the use of two eyes
- 3. a ring of the muscle tissue that forms the colored portion of the eye around the pupil and controls the size of pupil opening
- 7. the dimension of color that is determined by the wavelength of light
- 10. the nerve that carries neural impulses from the eye to the brain
- 11. the central focal point in the retina, around which the eye’s cones cluster
- 14. the transparent structure behind the pupil that changes shape to help focus images on the retina