Quote:
Originally Posted by gimble
Not really a paradox. Eye strain depends on a couple of factors.
1. The screen's actual contrast under the lighting conditions. Higher contrast leads to less strain.
2. The proportion of light coming off the screen, compared to the ambient environment. Here, the screen being much brighter than ambient conditions is worse for the eye.
That's why the inverted "night mode" is better in a dark environment. Setting the brightness just low enough so that the resulting contrast is just high enough to comfortably read, will generally lead to the lowest fatigue.
Edit: Just to add a bit more context. Lower contrast levels make the eye work that much harder focusing and scanning the information for our brains to interpret. Lighting condition differences between screen and ambient environment make the pupils (involuntarily) dilate or contract more often as the eyes reach the screen borders/middle. Both cases lead to more fatigue.
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Yes, yes. I understand the concept. But many users seem to figure the darker the room, the brighter they crank the illumination.