Not sure what you are asking about by "kill my eyes'. I have a 20" monitor on my desk at work and a 27" iMac at home. The different workspaces dictate that the iMac is actually a bit closer to me than the monitor (probably time to get a new desk at home!). At work, my monitor is nearly 3' from me (well beyond arm's reach), while at home the iMac is closer to 2' away (I can easily reach it). As far as pixel size, font size and possible eye strain, I have no issues with either distance. The only possible issue that I have is that I have to turn my head a bit to see the edges of the iMac - if it could be about 6" farther away, I think the entire screen would be easier to scan.