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The problem there is that, even if it were possible, most people do not have the same astigmatism in both eyes... so which eye would you calibrate the monitor to correct for?

You would use a special sort of display that would direct a distinct image to each eye.

3D displays that don't use special glasses already do this.

You mean these?

http://en.wikipedia.org/wiki/Autostereoscopy

You made me google it; I had no idea those existed. At first sight, it looks like it should be able to do what you ask. Geez, it could even diagnose your (short|long)sightedness|astigmatism and recheck it every now and then.

Pretty sweet tech; I hope it gets commercially viable soon!

What about correcting for color blindness? There must be a relatively easy way to auto correct certain colors so they stand out more. I bet there'd be a market for that.

ever heard of laser surgery?

There's a risk associated with that.