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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. [2] [3]
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). Redshift transitions the computer display's color temperature evenly between daytime and night temperatures to allow the user's eyes to slowly adapt.
Systematic reviews have highlighted the association between blue light exposure and digital eye strain. [11] [23] Digital screens emit significant amounts of blue light with shorter wavelength and higher energy compared to other visible light, which can cause symptoms such as eye fatigue, eye dryness, blurred vision, irritation, and headaches.
Protect your sleep and reduce eye strain with blue light blocking glasses! These stylish glasses filter out the harmful blue light emitted from screens, preventing it from disrupting your sleep ...
Adding a blue-light filter to your eyeglasses may not ease eye strain from computer work, protect the retina or help with sleep at night, according to a new review of existing research.
Computer eye strain is a major side effect of working from home. From blue light-blocking glasses and laptop screens to eye masks, these products can help.
The expansion of technology has led to more individuals utilizing computers and televisions which increase the overall exposure to blue light. Double-blind trials however, have shown no evidence to support the use of blue light filtering lenses for digital eye strain caused by blue light from electronic screens. [13] [14] [10]
Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.