80 Column Mind
The only difference may be the color management is set to a higher gamma, brightness, or contrast. But the real solution would be to, eventually, upgrade to a LCD monitor. Personally I can't use a CRT monitor for an extended period of time (even an hour) without having eye pains, and at the extreme end I get a massive migraine, because unfortunately I am sensitive to the flicker. You may also be developing a sensitivity.
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