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

(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.

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 ?
A community-based study of asthenopia in computer operators.
Fujikado, "Asthenopia from the viewpoint of visual information processing-effect of watching 3D images," Journal of the Eye, vol.
In muscle imbalance, this might put a strain on the extraocular musculature that is richly supplied with pain-sensitive nerve endings and lead to ocular asthenopia and headache.
Asthenopia and blink rate under visual and cognitive loads.
Among ocular causes, asthenopia (or eye strain) was a major entity as 62(16.36%) asthenopic patients presented with refractive errors.
Prevalence of Asthenopia among computer Users in Enugu, Southeast Nigeria.
In a previous clinical trial assessing the effect on asthenopia (Kajita et al.
Results of well-controlled trials in human volunteers suggest that the carotenoid antioxidant astaxanthin can help prevent eyestrain, known technically as asthenopia.
Selenow et al., "Reduction of asthenopia after accommodative facility training," American Journal of Optometry and Physiological Optics, vol.
INTRODUCTION: Eyestrain (asthenopia) is a symptom complex that involves sensation of irritation to the eye itself, changes in vision (such as blurred or double vision) and associated symptom such as headache.1, 2 It is seen and concluded in many studies that if a child has eyestrain he/ she cannot concentrate completely on his studies and his learning is affected.
For example it is suggested to be inherited as an autosomal dominant trait having high concordance among the twins, with high risk in children whose parents have astigmatism.3 Yet the evidence for the role of environmental factors in causing similar concordance is also suggested by Teikari.4 Astigmatism varies with age,5 gender6 and ethnicity7 leading to abnormal retinal electrophysiology,8 meridonal amblyopia,9 asthenopia, eye-strain, migraine, myopia and blindness.
Convergence insufficiency (CI) is associated with a number of symptoms, including headaches, eye fatigue, and asthenopia, and is estimated to be prevalent in 2.0 to 8.5 percent of the general population [45-46].