1. http://www.videophile.info/Screen/5thElement/Images/151-5110_IMG.JPGVision

3. http://www.cas.vanderbilt.edu/bsci111b/eye/cow-eye/cow-eye-dissection.htm Lens from a Cow’s Eye

4. Focal PointLENS Principle Axis

5. http://www.phys.ufl.edu/~avery/course/3400/vision/retina_picture_live.jpg

6. Lens

7. Blind Spot Focus your LEFT eye here. Slowly move the penny to the LEFT

8. http://www.ropard.org/learning/introduction.shtml

9. http://www.q8laser.com/engreferror.htm Far Sighted http://www.q8laser.com/engreferror.htm Near Sighted

10. http://www.ropard.org/learning/introduction.shtml FAR AWAY CLOSE TO CLOSE and SMALL FAR and LARGE FAR SIGHTED NEAR SIGHTED

11. http://www.ropard.org/learning/introduction.shtml FAR AWAY CLOSE TO FAR SIGHTED NEAR SIGHTED

12. http://www.ropard.org/learning/introduction.shtml FAR AWAY FAR SIGHTED NEAR SIGHTED CLOSE TO

13. http://www.ropard.org/learning/introduction.shtml FAR AWAY FAR SIGHTED NEAR SIGHTED CLOSE TO

14. http://www.svcmd.com/images/hyperopia_lg.jpg Far Sighted

15. http://www.svcmd.com/images/myopia_lg.jpg Near Sighted

16. http://www.jeyping.dynip.com/photos/16s/dsc00306.jpg

17. Astigmatism (Spherical Aberration) Light doesn’t converge to the same point Squinting to help clarity

18. http://www.bjandtony.com/images/04102007_Lasik_BJ.jpg LASIK Surgery

19. http://www.defense.gov/news/Jan2003/200301142b.jpg LASIK Surgery

20. http://www.avclinic.com/lasik.htm Reshaping cornea to compensate for the lens.