I notice an unusual phenomenon with my eyesight that I have be curious about for years. I use reading glasses. Without them, I can barely see the numbers on my watch. However, when I am outside on a sunny day, I can see every detail on my watch without glasses. The numbers seem so clear. I can also read without glasses. It is like having perfect vision. When I walk inside, my poor eyesight returns and I need glasses again. Why is this so?
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