How much distance must be from tv so that i don't get blind?

Television Risk: There is no good answer to this question given that blindness is not seen in this situation. Reasonable distance would be far enough to comfortably see the whole screen.

Minimum three feet: You will not go blind, but will develop eye strain and increase the risk of becoming more near sighted. If you "have to" sit closer than three feet to the tv to get it in focus, you are already near-sighted, myopic.