Ever find that after a while looking at the screen that your eyes are tired and strained? Generally, our monitors are set to have a very blue-based light, which emulates natural daylight. Some of us find the white is too bright and there are a couple of ways of dealing with this, apart from adjusting the monitor itself.
If, you find your eyes are strained at the end of the day then try flux  . Flux, tries to adjust your screen based on the kind of light that would naturally be occurring for the time of day. That is, it emulates sunrise and sunset, and becomes more golden yellow over the course of the day.
The Flux website claims that, blue light at the end of the day or before bed has a negative effect on sleep, by suppressing melatonin and interfering with circadian rhythms . This is also been the subject of some media articles  google,as ever, will reveal much! I like flux, it is free, open source and easily adjustable, which means that you can choose to reduce blue, back lit glare even in the morning.
Another way of, changing the background colour to reduce eye sensitivity, is to use either a screen overlay or a screen shader. If you are going to spend money on text to speech software Claro Read and Read Write Text both have screen rulers and dimmers included in the package. A high proportion of dyslexics benefit from a screen or page overlay as this reduces visual distortion and improves reading speed. I will compare these two products later in another blog. Next week, a look at email tips and tricks.
For now, try:
Flux free  Mac and Windows, iphone and iPad
For Mac OSX only
My point shade  (currently 79p in apple store), enables a full range of colours to shade the screen and is very configurable.
Android: none that I know of, please leave comment if you are aware of shading apps for Android.