Strabismus describes misaligned eyes—"a condition in which the eyes do not properly align with each other when looking at an object." I recently came across this condition, and felt like it described the experience I have been noticing when I look at any kind of screen.
"Symptoms of strabismus include double vision and/or eye strain. To avoid double vision, the brain may adapt by ignoring one eye. In this case, often no noticeable symptoms are seen other than a minor loss of depth perception. . . . In addition to headaches and eye strain, symptoms may include an inability to read comfortably, fatigue when reading, and unstable or "jittery" vision." (Wikipedia)
A few weeks ago, before encountering the term strabismus, I noticed this fleeting feeling that I was intermittently seeing the screen in mono vision.
I'm going to see an opthalmologist in a few weeks, so don't want to get ahead of myself with this "diagnosis." But could there be any plausibility to the following theory—certain modern screens and/or recent software developments (software-based dithering, PWM, etc.) cause people with minor strabismus to have alignment issues? It has been proven with fluorescent flickering, so it would certainly seem to make sense....