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Across 1. To make an image clear. 4. Curved inward. 5. The opening in the eye. 8. A group of light rays. 10. An explanation used as the base for an experiment. 11. The colored ring in the eye. 13. The blind spot in the eye. 15. Able to see objects better up close. 18. The image formed when light rays converge. 20. To come together. 22. Curved outward.

Down 2. The white of the eye. 3. An observable quantity that could change. 6. Able to see objects better from a distance. 7. What carries an image from the eye to the brain. 9. The inner layer of the eye. 12. The bending of light rays. 14. The reproduction of an object. 16. To bounce of a surface. 17. To spread apart. 19. Outer surface of the eye. 21. The transparent body in the eye.