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Medical condition
Eye strain
Other names
Asthenopia, aesthenopia
Specialty
Ophthalmology
Eye strain, also known as asthenopia (from Greek a-sthen-opia, Ancient Greek: ἀσθενωπία, transl. weak-eye-condition), is a common eye condition that manifests through non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and occasional double vision.[1] Symptoms often occur after long-term use of computers, digital devices, reading or other activities that involve extended visual tasks[2] which are broadly classified into external and internal symptom factors.[3]
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. This causes discomfort, soreness or pain on the eyeballs. Closing the eyes for ten minutes and relaxing the muscles of the face and neck at least once an hour usually relieves the problem.
A page or photograph with the same image twice, but slightly displaced (from a printing mishap, a camera moving during the shot, etc.) can cause eye strain due to the brain misinterpreting the image fault as diplopia and trying in vain to adjust the sideways movements of the two eyeballs to fuse the two images into one.
Eye strain can also happen when viewing a blurred image (including images deliberately partly blurred for censorship), due to the ciliary muscle tightening trying in vain to focus the blurring out.
^Sheedy, James E.; Hayes, John N.; Engle, Jon (November 2003). "Is all asthenopia the same?". Optometry and Vision Science. 80 (11): 732–739. doi:10.1097/00006324-200311000-00008. ISSN 1040-5488. PMID 14627938. S2CID 16299425.
^FT, Vaz; SP, Henriques; DS, Silva; J, Roque; AS, Lopes; M, Mota (April 2019). "Digital Asthenopia: Portuguese Group of Ergophthalmology Survey". Acta Med Port. 32 (4): 260–265. doi:10.20344/amp.10942. hdl:10400.10/2236. PMID 31067419. S2CID 148571110.
^JE, Sheedy; JN, Hayes; J, Engle (November 2003). "Is all asthenopia the same?". Optom Vis Sci. 80 (11): 732–739. doi:10.1097/00006324-200311000-00008. PMID 14627938. S2CID 16299425.
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our everyday lives." Symptoms include dry and irritated eyes, fatigue, eyestrain, blurry vision, difficulty focusing, headaches. However, the syndrome...
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may cause symptoms such as blurred vision, double vision, squinting, eyestrain, fatigue, or headaches. Some research has pointed to the link between...
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