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In page Computer vision syndrome:

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Some symptoms of CVS include headaches, blurred vision, neck pain, fatigue, eye strain,[1] 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,[2][3] strong blue-spectrum backlights,[citation needed] or bright overhead lighting) or air moving past the eyes (e.g. overhead vents, or direct air from a fan).