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Lenses

Published on Nov 22, 2015

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PRESENTATION OUTLINE

1.

Glasses

How do glasses differ in near-sighted and far-sighted people?
Photo by mayeesherr.
2.

How Glasses Work

  • Glasses bend light to help you see
  • All lenses have a curved suface
  • Pull in light and direct it
3.

Near-Sighted Lenses

  • Diverging/Concave lenses
  • Help to make far-sighted things look closer
  • People have myopia
4.

Far-Sighted Lenses

  • Converging/Convex lenses
  • People have Hyperopia
  • Helps to make close things focus better
5.

Different ways of combining lenses

  • Back Focal
  • Achromats
  • Achromat
  • Bifocal
  • Progressives
6.

Bibliography

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