Eyesight and vision are NOT the same.
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“Eyesight is simply the ability to see something clearly, the so-called 20/20 eyesight (as measured in a standard eye examination with a Snellen chart). Vision goes beyond eyesight and can best be defined as the understanding of what is seen. Vision involves the ability to take incoming visual information, process that information and obtain meaning from it.” – Dr. Donald Getz, OD
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Vision is so much more than just 20/20. Vision is dynamic. We have to be able to track, focus at different distances, peripheral vision, converge, diverge, depth perception, etc.
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If you want food movement then you need good vision. And if you want good vision then you have to train it!