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Eye strain, also medically termed as asthenopia (), is a common eye condition characterized by non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and occasional diplopia.
These symptoms tend to arise after long-term use of Computer, staring at phone screens, digital devices, reading, or other activities that involve extended visual tasks. Various causes contribute to eye strain, including uncorrected vision problems, digital device usage, environmental factors, and underlying health conditions. When concentrating on a visually intense task, such as continuously focusing on a book or computer monitor, the ciliary muscles and the extraocular muscles are strained, also contributing to the symptoms. These symptoms are broadly classified into external (related to the ocular surface) and internal symptom factors (related to eye muscles).
Treatment involves environmental modifications, visual aids, and taking periodic breaks. The experience of eye strain when reading in dim light has given rise to the common misconception that such an activity causes permanent eye damage.Rachel C. Vreeman, Aaron E. Carroll, "Medical Myths", The British Medical Journal (now called The BMJ) 335:1288 (December 20, 2007),
Symptoms of eye strain can include:
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