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]

Farlex Partner Medical Dictionary © Farlex 2012

asthenopia

(ăs′thə-nō′pē-ə)

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]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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.

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References in periodicals archive

A community-based study of asthenopia in computer operators.

Ametropia in children with headache

Fujikado, "Asthenopia from the viewpoint of visual information processing-effect of watching 3D images," Journal of the Eye, vol.

Effect of Illumination on Ocular Status Modifications Induced by Short-Term 3D TV Viewing

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.

Clinical study of headache with special reference to ophthalmic cause

Asthenopia and blink rate under visual and cognitive loads.

Human-technology interface: Computers & vision health

Among ocular causes, asthenopia (or eye strain) was a major entity as 62(16.36%) asthenopic patients presented with refractive errors.

Aetiology of headache in clinical ophthalmic practice at a tertiary care hospital of Karachi

Prevalence of Asthenopia among computer Users in Enugu, Southeast Nigeria.

Prevalence of ocular symptoms among computer professionals in a university setting in South India

In a previous clinical trial assessing the effect on asthenopia (Kajita et al.

Effect of crocetin from Gardenia jasminoides Ellis on sleep: a pilot study

Results of well-controlled trials in human volunteers suggest that the carotenoid antioxidant astaxanthin can help prevent eyestrain, known technically as asthenopia.

Relieve your tired eyes: while guarding against common eye diseases

Selenow et al., "Reduction of asthenopia after accommodative facility training," American Journal of Optometry and Physiological Optics, vol.

Effect of Vision Therapy on Accommodation in Myopic Chinese Children

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.

Assessment of causes of eyestrain in emmetropes, 10-18 years of age

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.

Frequency of amount and axis of astigmatism in subjects of Rawalpindi, Pakistan

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].

Development of a mild traumatic brain injury-specific vision screening protocol: a Delphi study