Vision Variance

This is a very good article.  The author was very informative regarding the vision variances used by Optometrists as a standard to express sharpness of vision.  The article defines the term 20/20 vision as the term used to express normal visual clarity or sharpness, it does not mean perfect vision, just the clarity of vision at a specific distance.  Author also explained the other important vision skills; peripheral awareness or side vision, eye coordination, depth perception, focusing ability, and color vision all of which contribute to overall vision ability.  Author reminds readers to keep regular eye examinations.  This is an article that everyone should read.
http://www.superbvision.com/2009/10/20/seeing-the-world.html