If you look at ur monitor more than anything else try this software for Protection of Eyes.
F.lux fixes this: it makes the color of your computer's display adapt to the time of day, warm at night and like sunlight during the day.
Post Installation Needs:
Right Clicking on this Icon in System Tray, you will get several options
>>Change Location to your own setting like "15.42N 73.98E" for Goa,India
After Installation you need to change Location Setting for correct effect on your machine
You can get your personal location settings from "http://stereopsis.com/flux/map.html"
For E.g. for Goa,India change Location Setting to : "15.4253792, 73.9830029" without quotes
>>You can even it disable it for an hour if doing some graphic editing or watching some video, where
you don't want it to effect