You who spend hours scanning your computer screens, this article is addressed to you! Whether you spend time browsing your favorite sites, working on code or simply blogging on Steemit, there is a health factor to consider : eye fatigue and blue light emission. This last parameter can be detrimental to our sleep if we are exposed to various screens or light sources over a long period of time. Indeed, the sleep hormone, called melatonin, is not secreted correctly in the face of this stimuli, as demonstrated by the study carried out by the University of Surrey, which you will find a summary of this study through the following link: https://www.frontiersin.org/articles/10.3389/fpubh.2015.00233/full Unfortunately, there are no other ways to deal with this problem than stopping your current activity and taking a break before you get to sleep. However, an alternative exists to mitigate this phenomenon, in the form of a simple software called Redshift. ## Sifted ambience

This tool developed under the GPL 3.0 license, available under GNU/Linux, MacOS and Windows, allows everyone to enjoy their computer without the inconveniences of blue light projection. How? Quite simply, by adjusting the brightness of the monitor but also the temperature of the colors on the screen in real time, according to the time of day. It can be used in command line or more easily via a graphical interface, at the user's choice. In practice, Redshift remains very appreciable so that one does not pay attention to the unsaturated hues which slightly distort the displayed colors. However, its use can quickly prove beneficial. Your eyes and your sleep will be less disturbed in this way. Of course, you are free to try it and make your own opinion. The official website for more information: http://jonls.dk/redshift/

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