Parts of the Eye & Vision

2. the point at which the optic nerve leaves the eye, creating a blind spot because no receptor cells are located there
3. nerve cells in the brain’s visual cortex that respond to specific features of the stimulus, such as shape, angle, and movements
4. a depth cue available to either eye alone
6. the adjustable opening in the center of the eye through which light enters
8. the nerve that carries neural impulses from the eye to the brain
9. the dimension of color that is determined by the wavelength of light
10. the central focal point in the retina, around which the eye’s cones cluster
13. the process by which the eye’s lens changes shape to focus near or far objects on the retina
14. retinal receptors that are concentrated near the center of the retina and that function in daylight/well-lit conditions, give detail and color sensations
15. the transparent structure behind the pupil that changes shape to help focus images on the retina

1. theory that opposing retinal processes enable color vision
5. a depth cue that depends on the use of two eyes
7. a ring of the muscle tissue that forms the colored portion of the eye around the pupil and controls the size of pupil opening
11. 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
12. retinal receptors that detect black, white, and gray, and are sensitive to movement