Long hours in front of a computer screen can cause great eyestrain and fatigue.
The “repetitive stress”corresponding to such constant focusing and adaptive efforts from the eyes can lead to a bunch of symptoms, hence a syndrome, conveniently called Computer Vision Syndrome: Blurred Vision, Double vision, Eye Dryness, Headaches, Neck pain…
This is where the project Redshift comes in.
“Redshift adjusts the color temperature according to the position of the sun. A different color temperature is set during night and daytime. During twilight and early morning, the color temperature transitions smoothly from night to daytime temperature to allow your eyes to slowly adapt. At night the color temperature should be set to match the lamps in your room. This is typically a low temperature at around 3000K-4000K (default is 3700K). During the day, the color temperature should match the light from outside, typically around 5500K-6500K (default is 5500K). The light has a higher temperature on an overcast day.”
It sounds both poetic and soothing although I haven’t tested it, and I believe it would be for everyone to make their own opinion. I am told some are very satisfied with it and wouldn’t live without it, while others cannot stand it – or simply find it incompatible with their tasks, being, for example, graphic designers working with colors.
French readers can read a review of Redshift by Geekfault (stroll down the commentaries for users feedbacks).
Redshift, ne vous abimez plus les yeux la nuit, by Geekfault.