Digital eye strain

Also known as: Computer vision syndrome, DES

A cluster of vision-related symptoms caused by prolonged use of digital devices — eyes that feel tired, dry, blurred, or sore, often accompanied by headaches and neck/shoulder tension.

Digital eye strain (also called computer vision syndrome) is the modern label for the set of symptoms that emerge after extended close-up screen work. The American Optometric Association lists tired or burning eyes, blurred or double vision, dry eyes, headaches, and neck or shoulder pain as the core symptoms. Mechanisms include sustained ciliary-muscle contraction (focus fatigue), reduced blink rate (tear-film disruption), glare and contrast strain, and posture-driven musculoskeletal load. Treatment is primarily behavioral — regular breaks (the 20-20-20 rule), proper ergonomics, adequate room lighting, and corrected refractive error.