Once read that we use between one-fourth and one-third of our total body energy for vision. I thought that could not possibly be correct. So I asked an optometrist and he said it was correct. Unconvinced, I asked an M.D. He also said it was about right!! So if we really need to rest, it appears that we need to close our eyes. For a substantial amount of time. That might be why you get better so much quicker than your DH. pj
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