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