If there's any correlation between sitting so close to the TV as a child that it looked like you were about to make out with it and needing glasses as an adult, then it's probably the other way around -- that is to say, you were sitting that close because you had s****y eyesight to begin with, and that was the only way you could see the TV.
In fact, of all the studies that have been done to test whether there was a minimum distance below which the TV would start to fry your eyes into smoking craters, no evidence has ever come out to suggest that there even is one. The rumors probably surfaced back when old-timey televisions spewed radiation, and people were worried about damaged eyes and/or Hulk powers during Amos 'n' Andy.
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"Get back from the TV before you get eye cancer! And drink your Radithor!"
Staring at television or computer screens for long periods can make your eyes hurt and feel dry and strained, but this isn't because the screen is harming your eyes; it's because focusing hard on something means you blink less often, and your eyes get tired. Just take a break now and then, and you can press your nose right up against that porno without worrying about cataracts.