CVS is a temporary condition resulting from focusing the eyes on a computer display for protracted, uninterrupted periods of time. Symptoms of CVS include headaches, blurred vision, neck pain, fatigue, eye strain, dry, irritated eyes and difficulty refocusing the eyes. These symptoms can be further aggravated by improper lighting conditions (i.e. bright overhead lighting or glare) or air moving past the eyes (e.g. overhead vents, direct air from a fan).
“EyeDefender can also help you prevent other problems related to computer use, which require a computer user to take short breaks. These problems include Carpal Tunnel Syndrome (CTS) or Occupational Overuse Syndrome (OOS), also known in the USA as Repetitive Strain Injury (RSI) and in Europe - Musculoskeletal Disorders (MSD).”
EyeDefender runs automatically in the system tray and guides a computer user to take a break, when it’s really needed to protect your eyes from CVS.
I think EyeDefender is very useful software because nowadays many hardcore computer users (including me) often face these problems, though EyeDefender is only available for Windows based PCs.