1. Corrections

2. Eye worksheet 1. Choroid 2. Light-sensitive nerve cells, rods and cones or photoreceptors 3. Iris – pupil reflex 4. Sclera 5. A hole – allows light to enter the eye 6. On the retina 7. The lens 8. Aqueous humour 9. Iris 10. Vitreous humour

3. 11. Optic nerve 12. When looking at colours or for details 13. The spot where the optic nerve leaves the retina – no rods or cones here 14. Pupil will contract (get smaller), muscles of the iris make the hole smaller 15. long and thin 16. Upside down 17. The light bends as it passes through the cornea and the lens 18. Light hits the object, and the reflected light enters our eye. The image then forms on our retina and the information is sent to out brain. 19. White light contains all colours. The shirt absorbs some colours but not red, so it is reflected back. 20. Refraction – bending of light rays when light enters another substance and moves at a different speed

4. 21. You can see at 15 feet what you should see at 20 feet (not good) 22. You can see at 25 feet what you should see at 20 feet (good) 23. a) Eye is too long b) light rays are bent too much 24. a) eye is too short b) light rays are not bent enough 25. Lens no longer accommodates (gets fat to see close objects) 26. Malformation present at birth (not covered, did you look it up?) 27. It will bend the light rays apart so the image forms on the retina and not before 28. Combination of problems