Across
- 4. Structure in the eye that controls the quantity of light entering the eye.
- 6. The defect of sight that is caused by an uneven curvature of the cornea of our eye lens.
- 10. A tool to overcome the limitations of sight.
- 11. The black layer that prevents the reflection of light in the eye.
- 12. Photoreceptors are found abundantly in this structure.
Down
- 1. Anything that makes an organism react.
- 2. The structure that maintains the shape of the eye and protects it.
- 3. Reading, exercise and writing are ___________ actions.
- 5. An example of involuntary action.
- 7. A defect of sight that can be corrected by using a convex lens.
- 8. A lens that is used to correct long-sightedness.
- 9. The organ in the body that interprets the impulses.