Computer Vision Syndrom

CVS (Computer Vision Syndrome) is a term used to describe a collection of symptoms caused by prolonged computer use.
Symptoms of CVS
People who suffer from CVS may experience the following symptoms:

* Dry eyes
* Headaches
* Eye irritation
* Blurred vision
* Light sensitivity
* Temporary inability to focus on a distant object (pseudomyopia)
* Double vision
* Squinting
* Neck and shoulder pain

Main source: http://vision.about.com/od/sportsvision/a/Computer_Vision.htm?nl=1