1. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The Eye 1

2. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The path that light follows 2

3. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #1…Cornea Clear, thin outer part of the eye Refracts 75% of the light that enters the eye 3

4. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. LASIK  Laser-Assisted In-Situ Keratomileusis (vision correction laser surgery) 4

5. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #2…Aqueous Humor  Thin, clear liquid behind the cornea  If it doesn’t drain properly…glaucoma can develop 5

6. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc.6

7. #3…Pupil  Not really a physical part of the eye  It is only an opening…like a doorway or open window  It is black, b/c light is absorbed into the eye and not reflected back out 7

8. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #4…Iris  The colored part of the eye  It opens and closes the pupil…to control the amount of light that enters the eye  It is a (sphincter) muscle 8

9. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #5…Lens  A clear, bi-convex lens that refracts light  It changes it’s shape in order to focus 9

10. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #6…Ciliary muscles  They push and pull the lens to change it’s shape 10

11. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #7…Vitreous Humor  Clear, jelly-like fluid that refracts light  Helps to keep the shape of the eyeball 11

12. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #8…Retina  The back, inner surface of the eye  An image must be clearly focused here in order to see clearly 12

13. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. #9…Optic Nerve  1 million nerves…the pathway to the brain  If an image falls here, you won’t see anything 13

14. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. Only in animals…Tapetum lucidem  Latin for “bright tapestry”  Lies behind the retina and will reflect light back onto the retina for superior night vision 14

15. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. If you can only see up close…myopia 15

16. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. If you can see only far away…hyperopia 16

17. General, Organic, and Biological ChemistryCopyright © 2010 Pearson Education, Inc. The Eye 17