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eyestrain |
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eyestrain /eye·strain/ (-strān) fatigue of the eye from overuse or from uncorrected defect in focus of the eye.
asthenopia Term used to describe any symptoms associated with the use of the eyes. The causes of asthenopia are numerous: sustained near vision, either when the accommodation amplitude is low or hypermetropia is uncorrected (accommodative asthenopia), aniseikonia (aniseikonic a.), astigmatism (astigmatic a.), pain in the eye (asthenopia dolens), heterophoria (heterophoric a.), ocular inflammation (asthenopia irritans), hysteria (nervous a.), uncorrected presbyopia (presbyopic a.), improper illumination (photogenous a.) or retinal disease (retinal a.). Syn. eyestrain; near point stress (NPS) (although this term is restricted to any symptoms arising from near vision). See convergence excess; convergence insufficiency; divergence insufficiency; visual fatigue; ocular headache. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Tension, fatigue, allergies, sinus problems, and eyestrain can jump-start a headache. They provide illumination that's close to natural lighting and help to reduce eyestrain when reading. The PM Series provides near-daylight color rendition, reducing eyestrain and fatigue. |
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