How might this occur? It turns out that excess glucose from high glycemic index carbohydrates creates damaged proteins in the lens of the eye. These damaged proteins are then poorly recognized because of the "machinery" that removes these proteins is also affected by the excess glucose in a bad way. The result is an increase in the generation of cortical cataracts.
It's amazing how much we are now learning about the risks of high carbohydrate diets, especially from high glycemic index carbohydrates, even in people who don't have diabetes. First Macular Degeneration and now cataracts. It seems there's still lots to learn about what makes an "eye healthy" diet!