Across
- 3. Protects the eye from injury and external debris
- 5. A clear, flexible structure behind the iris that fine-tunes focus
- 7. Where the optic nerve fibers cross
- 8. Photoreceptor used for polychromatic vision in high light
- 9. The colored part, a muscle that adjusts the pupil's size
- 10. Photoreceptor used for monochromatic vision in low light
- 11. Transmits electrical signals from the retina to the brain
Down
- 1. The central opening in the iris that lets light in
- 2. Light-sensitive tissue at the back of the eye with photoreceptors (rods for low light, cones for color) that convert light to nerve signals
- 4. Where no photoreceptors are present in the retina
- 6. The white, tough outer wall that maintains the eye's shape
- 8. The clear, dome-shaped front part that bends (refracts) incoming light