asthenopia (redirected from Eye strain)

asthenopia /as·the·no·pia/ (as″thĕ-no´pe-ah) weakness or easy fatigue of the eye, with pain in the eyes, headache, dimness of vision, etc.asthenop´ic

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accommodative asthenopia  asthenopia due to strain of the ciliary muscle.

muscular asthenopia  asthenopia due to weakness of external ocular muscles.

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as·the·no·pi·a (sth-np-)

n.

See eyestrain.

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asthe·nopic (-npk) adj.

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asthenopia

[as′thənō′pē·ə]

Etymology: Gk, a, sthenos + ops, eye

a condition in which the eyes tire easily because of weakness of the ocular or ciliary muscles. Symptoms include pain in or around the eyes, headache, dimness of vision, dizziness, and slight nausea.

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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.