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Your eye’s aren’t backlit? Also, you don’t have the risk of spending hours and hours at the exact same image. Plus, the blackness of your eyes closed is like turning the screen off.
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Because the image is displayed on them and not on the eyes, also we blink and screens don't. >

Yes, but we still get “burn in” when we stare at bright objects for while. It’s not really a huge problem but it’s still similar.