1. Lenses and the Human Eye

2. Types of Lenses: double convex lens single convex lens concavo-convex lens convexo-concave lens single concave lens double concave lens

3. Thin Lens Equation: d 0 = distance of object from lens d i = distance of image from lens f = focal length of the lens

7. The Eye

8. The Eye

11. contracted pupil dilated pupil

14. Video: How the Human Eye Works http://www.youtube.com/watch?v=JadaWSDxBYk

15. Vision Problem: Myopia A nearsighted (myopic) eye focuses the light rays to a point in front of the retina Myopia can be corrected with diverging lenses

16. Vision Problem: Hyperopia A farsighted (hyperopic) eye focuses the light rays to a point behind the retina Hyperopia can be corrected with converging lenses

17. Vision Problem: Astigmatism Astigmatism is a vision problem that results from a cornea that has an irregular shape

18. Video: Laser Eye Surgery http://www.youtube.com/watch?v=0V4I2xzwGd4

19. Optical Technology Read p. 487-489 Answer questions 1-5