Across
- 7. dark circle that lets light in
- 8. area where is no light sensitive cells
- 9. the eye's white outer covering
- 11. inner eyelid in some species
- 12. term used for the ability to see 2 colors
- 15. used to perceive color
- 17. night vision;low light
- 18. term used for the ability to see 3 colors
- 20. flexible structure that can change shape
Down
- 1. allows cats night vision capabilities
- 2. keeps the cornea's shape
- 3. muscle that controls light entrance; various color
- 4. guards against dust
- 5. contains layers of light sensitive cell
- 6. a bony cavity that protects the eye
- 10. gives the eyeball its shape
- 13. starts the visual process; tough covering; allows light to bend
- 14. keeps the eyes moist
- 16. carries info from the eye to the brain
- 19. pink inner protective membrane of the eye