What is Computer Vision Syndrome?

Computer Vision Syndrome (CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time and the eye's muscles being unable to recover from the constant tension required to maintain focus on a close object. Some symptoms of CVS include headaches, blurred vision, neck pain, fatigue, eye strain,dry eyes, irritated eyes, double vision, vertigo/dizziness, polyopia, and difficulty refocusing the eyes. These symptoms can be further aggravated by improper lighting conditions (i.e. glare, strong blue-spectrum backlights,[citation needed] or bright overhead lighting) or air moving past the eyes (e.g. overhead vents, direct air from a fan).