The official definition: “Computer Vision Syndrome” CVS , refers to digital eyestrain, describing all visual problems and symptoms related to prolonged screen use, including computers, tablets, smartphones, and TVs.
In optics, this eye strain is called asthenopia.


In everyday language, we simply refer to it as “tired eyes,” “irritated eyes,” “dry eyes,” lack of concentration, or headaches...

These are all symptoms of visual fatigue caused by extended screen time in the digital world."