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Holding head underwater improves eyesight ?
#1
I read keeping your head underwater for as long as possible can improve eyesight. any truth in this ?

Obviously be safe and make sure you dont injure yourself.
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#2
apparently it teaches you to breathe, so we become concious breathers
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#3
I think that is very possible to cause a lot of strain.

There are other ways to improve your sight that are test and are working.

But if you want, you can put it in a test and find out.
Just don't test it in the sea or on deep waters, and have someone to look at you for caution's sake.
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