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2. Computer vision syndrome - Wikipedia

   en.wikipedia.org/wiki/Computer_vision_syndrome

   Computer vision syndrome (CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time and the eye's muscles being unable to recover from the constant tension required to maintain focus on a close object.

3. f.lux - Wikipedia

   en.wikipedia.org/wiki/F.lux

   f.lux (pronounced "flux") is a cross-platform computer program that adjusts a display's color temperature according to location and time of day, offering functional respite for the eyes. The program is designed to reduce eye strain during night-time use, helping to reduce disruption of sleep patterns .

4. Glare (vision) - Wikipedia

   en.wikipedia.org/wiki/Glare_(vision)

   Reduction of brightness of the rest of the scene by constriction of the pupils; Reduction in contrast of the rest of the scene by scattering of the bright light within the eye. Reduction in contrast by scattering light in particles in the air, as when the headlights of a car illuminate the fog close to the vehicle, impeding vision at larger ...

5. Blue light spectrum - Wikipedia

   en.wikipedia.org/wiki/Blue_light_spectrum

   The American Optometric Association (AOA) recommends adjusting how a computer is viewed to prevent and treat CVS. According to the American Optometric Association: "Optimally, the computer screen should be 15 to 20 degrees below eye level (about 4 or 5 inches) as measured from the center of the screen and 20-28 inches from the eyes."

6. Flicker (screen) - Wikipedia

   en.wikipedia.org/wiki/Flicker_(screen)

   The flicker of a CRT monitor can cause various symptoms in those sensitive to it such as eye strain, headaches [9] in migraine sufferers, and seizures in epileptics. [10]As the flicker is most clearly seen at the edge of our vision there is no obvious risk in using a CRT, but prolonged use can cause a sort of retinal shock where the flickering is seen even when looking away from the monitor.

7. Redshift (software) - Wikipedia

   en.wikipedia.org/wiki/Redshift_(software)

   Redshift is an application that adjusts the computer display's color temperature based upon the time of day. The program is free software, and is intended to reduce eye strain as well as insomnia [3] (see Sleep#Circadian clock and Phase response curve#Light).