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

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Presentation transcript:

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

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

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

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

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

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

#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

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

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

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

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

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

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

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

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

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

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

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