asthenopia


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Related to asthenopia: asthenophobia

asthenopia

 [as″thĕ-no´pe-ah]
weakness or easy fatigue of the eye, with pain in the eyes, headache, and dimness of vision. adj., adj asthenop´ic.
accommodative asthenopia asthenopia due to strain of the ciliary muscle.
muscular asthenopia asthenopia due to weakness of the external ocular muscles.

as·the·no·pi·a

(as'thĕ-nō'pē-ă),
Subjective symptoms of ocular fatigue, discomfort, lacrimation, and headaches arising from use of the eyes.
Synonym(s): eyestrain
[G. astheneia, weakness, + ōps, eye]

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
accommodative asthenopia  asthenopia due to strain of the ciliary muscle.
muscular asthenopia  asthenopia due to weakness of external ocular muscles.

asthenopia

(ăs′thə-nō′pē-ə)
n.
Weakness or fatigue of the eyes, usually accompanied by headache and dimming of vision.

as′the·nop′ic (-nŏp′ĭk) adj.

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.

as·the·no·pi·a

(as'thĕ-nō'pē-ă)
Subjective symptoms of ocular fatigue, discomfort, lacrimation, and headaches arising from use of the eyes.
Synonym(s): eyestrain.
[G. astheneia, weakness, + ōps, eye]

asthenopia

‘eyestrain’, headaches or visual difficulty attributed to misuse of the eyes. A vague and, in the absence of refractive error, often imaginary entity. The term is not now generally used by ophthalmologists. See also ACCOMMODATIVE ASTHENOPIA.

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.
References in periodicals archive ?
Significant improvements in reducing asthenopia and positive accommodation occurred for the 4 mg and 12 mg astaxanthin groups.
DePrince, over the past five years his company has sponsored nine human clinical studies at six different universities and technical institutes on the use of its AstaReal astaxanthin, demonstrating significant results for the reduction of asthenopia.
Table 1 Differential diagnosis of convergence anomalies (1,2) Problem Patient type Likely symptoms Primary convergence Any age group Asthenopia diplopia insufficiency Good health otherwise for near Secondary convergence Often elderly Diplopia for near insufficiency patients with significant health problems Primary convergence Any age group with Diplopia for near paresis or paralysis no significant history Secondary convergence Likely underlying Diplopia for near paresis or paralysis neurological deficits May be secondary to head trauma Convergence spasm Young patients Diplopia More likely to be and reduced female patients.
Reduction of asthenopia in patients with convergence insufficiency after fusional vergence training.
Fuji Chemical Industry, makers of AstaReal astaxanthin has sponsored a tremendous amount of research over the past 10 years to investigate the potential benefits of astaxanthin in such areas as cardiovascular/hypertension, gastric, skin, muscle endurance, fat reduction, diabetes, asthenopia (eye fatigue), inflammation, nephropathy, immunomodulation and fertility," he said.
These can be grouped into visual problems (for example diplopia and blurred vision), binocular problems (for example closing poor depth perception) and asthenopia (for example headaches and aching eyes).
Symptoms of accommodative deficit, such as blur, intermittent diplopia, and near work asthenopia, could negatively affect reading ability (a primary problem in mTBI [11,34,39-40]), ambulation, driving, and visual detection/discrimination tasks [25,41].
In the presence of unstable esophoria, pseudomyopia and asthenopia