I am nearsighted, so I need glasses to see far. Anything over about a foot away starts to get blurry. But I have a second pair of "computer" glasses--basicall

I am nearsighted, so I need glasses to see far. Anything over about a foot away starts to get blurry. But I have a second pair of "computer" glasses--basically, these are de-rated versions of my normal glasses. With these glasses, I can still see about 10-20 feet away but then things get blurry. The theory is because the correction is less severe, these cause less eye strain when I'm looking at a computer all day.