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Question

Into English please. Formal & informal (even Slang).
 

Comments

dont sit so close to tv. sit a little more back.your eyesight would be weak if you dont do this

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Don't know about the slang (which I think is the point here), however I would say like this: 

Don't sit too/so close to the TV, sit a little bit farther. It will hurt/damage/ruin your eyes/eyesight.

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Hi

Thanks.
 

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My pleasure

Answer 1

Don't sit too close to TV or you ruin your eyes (eyesight)

http://www.livescience.com/22465-does-sitting-too-close-to-the-tv-really-ruin-your-eyesight.html