Parts of the Eye

123456789
Across
  1. 4. carries neural impulses from the eye to the brain
  2. 6. central focal point in the retina
  3. 7. adjustable opening in the center of the eye through which light enters
  4. 9. light sensitive inner surface of the eye
Down
  1. 1. point at which the optic nerve leaves the eye
  2. 2. ring of muscle tissue that forms the colored portion of the eye around the pupil and controls size of the pupil
  3. 3. detects fine details and give rise to color sensations
  4. 5. necessary for peripheral and twilight vision
  5. 8. transparent structure behind the pupil that changes shape to help focus images