Quote:
Originally Posted by rcentros
It's probably partly (at least) the high contrast that makes LCD screens uncomfortable for extended reading sessions. I don't know why, I just know what is — I can read for hours with eInk devices without eye fatigue and I can't do that with LCD devices.
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Unless one has some sort of serious eye complaint it is having the screen too bright that causes problems.
The better reading apps for phones/tablets/PCs include both good and easy control of brightness and of color (which does not mean one has to have dramatic colors just that one can introduce, for example, a light tint to the background so that it is more paper like). The eye will accommodate to quite low levels as people who travel regularly from low latitudes to high latitude winters know (to say much beyond 50 degrees N or S); the eyes accommodate but then one goes to take a photo and wonders why the exposure is so long.
Reflective displays such as E Ink are just not capable of high brightnesses even if artificially front lit, as they are very inefficient reflectors (compare with the reflection of light from a mirror or polished chromium plated surface, for example).
Even IT pros can get caught out with brightness on displays. Just a couple of weeks ago I had a case where one complained of developing headaches and it had got to the stage where he was quite worried and tried various things (eliminating various foods, been to an optician, for example) and was about to go to the doctor expecting a brain tumor. I suggested to him to check his monitor as the headaches started occurring after he had started working in a new client's office on one of their workstations, but he was insistent it would not be that as it did not look bright. However, in the end he turned the brightness down, his eyes accommodated the lower level so he did not notice the difference, and his headaches disappeared immediately.