Article assumes 1 arcminute resolution. This means at 6 inches distance you need 44 micron pixels, which is a bit smaller than 78 micron iPhone retina displays.

Article assumes 1 arcminute resolution. This means at 6 inches distance you need 44 micron pixels, which is a bit smaller than 78 micron iPhone retina displays. The caveat is that that's ideal resolving ability of the human eye (black/white with good eyesight). For colors a lesser resolution is needed. Takeaway for those of us using computers everyday. If you have a big monitor with good resolution and your eyes still hurt, perhaps you're leaning in too close. Take advantage of your eyes' limited resolution, increase your font size, and sit farther from the monitor.