What happens if you wear glasses for 3 days (good eyesights)?

Anonymous
No i'm not trying to make my eyesights bad bc glasses, but my friend is. She likes the fashionn of glasses but i told her to wear the fake ones but she said she prefers the real ones. And she decided to wear glasses for 3 days and see what happens.

should i be worried?
What happens if you wear glasses for 3 days (good eyesights)?
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