What does it mean when someone has 20/20 vision?

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Is it possible to change your eye color?

Is it possible to change your eye color?

It's possible to have surgery to change your eye color, but it's not without risks. Learn more at HowStuffWorks.

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  • American Optometric Association. "Visual Acuity: What is 20/20 Vision?" http://www.aoa.org/x4695.xml 
  • National Institutes of Health, Medline Plus Medical Encyclopedia. "Visual Acuity Test. http://www.nlm.nih.gov/medlineplus/ency/article/003396.htm
  • NDT Research Center. "Visual Acuity of the Human Eye." http://www.ndt-ed.org/EducationResources/CommunityCollege/PenetrantTest/Introduction/visualacuity.htm
  • Strouse Watt, Wendy. "How Visual Acuity is Measured." Macular Degeneration Support. http://www.mdsupport.org/library/acuity.html
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