At one point I used a netbook with an 8.9" screen and had no problems with it, but the screen on the 2011 11" MBAs caused eyestrain for me, even just playing around with it in store for a little while. I'm not sure if it was the resolution or what? Regardless, can anything be adjusted to make the screen more comfortable? I can't say it was solely size if I could use the 8.9" screen without issue.