An article in Science Digest pointed out (a few years ago) that among
Inuit raised on traditional diet the incidence of myopia was 0%. Among
their children raised on SAD (after WWII) it was 49%.
Scientific American had an article "Glucose and Aging" (May '87) that has
a diagram of how glucose crossbinds with the protein in the lens of the
eye making it less able to focus in later life.
Ray Audette