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Query: UMLS:C0018681 (headache)
 56,091 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This paper reports on the findings of a cross-sectional study of 79 data entry clerks employed by an Ontario-based organization in five separate offices. The study was conducted to identify factors associated with physical complaints experienced by these office workers. A large percentage of the data entry clerks reported chronic physical complaints (eyestrain, musculo-skeletal pains, headache) as well as emotional or mental stress which they felt were associated with their occupation. Poorly designed overhead lighting systems in all offices contributed to both eyestrain and headache. Duration of employment as a data entry operator within the organization was not associated with stress or physical health complaints. The presence of an adjustable workstation did not in itself guarantee any protection from these conditions. Highly significant associations between occupational stress levels and some physical complaints were observed. The presence of these associations indicated that the management of both physical and stress complaints within these office environments should be tackled simultaneously.
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PMID:A cross-sectional study of health complaints among 79 data entry operators using video display terminals. 192 38

Pain around the eye can be caused by local ophthalmic disorders or by disease of other structures sharing trigeminal nerve sensory innervation. In general, most ocular causes for pain also cause the eye to be red, thus alerting the examiner to the focality of the problem. However, conditions like eyestrain, intermittent angleclosure glaucoma or neovascular glaucoma, and low-grade intraocular inflammation can be painful and not be associated with obvious redness. Ocular signs and symptoms also occur with numerous other causes of headache. Double vision in association with periocular pain can result from orbital lesions, isolated cranial neuropathies, and cavernous sinus lesions. Pupillary abnormalities like Horner's syndrome may result from a variety of painful conditions, including cluster headache, parasellar neoplasms or aneurysms, internal carotid dissection or occlusion, and Tolosa-Hunt syndrome. Pain with a dilated and unreactive pupil may reflect a benign condition like Adie's syndrome or ophthalmoplegic migraine, or it may herald the presence of a life-threatening posterior communicating artery aneurysm. Headache and transient visual loss can be manifestations of classic migraine, or be symptoms of ocular hypoperfusion from ipsilateral internal carotid occlusion or increased intracranial pressure from pseudotumor cerebri. In a young patient, head pain with a fixed visual deficit may result from optic neuritis, in an older adult, temporal arteritis may be the culprit. Ophthalmologic aspects of headache thus encompass problems that range from simple and benign to complex and formidable.
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PMID:Ophthalmologic aspects of headache. 202 Feb 23

An epidemiological survey on 30,000VDT operators has been carried out to evaluate the relationship between asthenopia and monitor characteristics. A VDU operator has been classified as asthenopeic if he complained about at least two of the following ten symptoms: headache, tearing, eye smarting, blurred vision, double vision, ocular itching, photophobia, blinking, nausea, eye heaviness. Visual discomfort has been related to 1) the presence of flicker; the possibility to regulate, 2) brightness, 3) height; and 4) inclination of monitor. Asthenopia has resulted statistically correlated to the presence of flicker and to the impossibility of regulating height and inclination of monitor for both sexes. The possibility to regulate monitor brightness has not determined a reduction of visual discomfort either in men or in women.
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PMID:[Asthenopia and monitor characteristics]. 208 58

Eye strain and headache are common ocular symptoms, and the main cause in persons aged 15 to 40 is convergence insufficiency. It is more common in females than in males. Many patients are supplied with glasses for eye strain without the causative convergence insufficiency being treated. The treatment in most cases is orthoptic exercises.
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PMID:Eye strain from convergence insufficiency. 503 84

A retrospective review of the records of 114 subjects with accommodative dysfunction has been completed. Most subjects (N = 96) were found to have accommodative insufficiency. Lesser numbers of subjects were categorized in the class of infacility of accommodation (N = 14), spasm of accommodation (N = 3) and fatigue of accommodation (N = 1). A majority of the subjects presented with complaints of blur, headaches and/or asthenopia while attempting nearwork. Most subjects presented with reduced abilities in one or more of the following areas: accommodative amplitude and facility, fusional vergences, near point of convergence and stereo acuities. The clinical characteristics of the group as a whole and the major subgroups have been examined both before and after treatment of the condition with orthoptic exercises and/or plus lenses at the nearpoint. The result of the treatment indicates that although most subjects (96%) experienced some relief with treatment only about half (53%) had their problems totally solved. The importance of these findings is briefly discussed.
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PMID:Accommodative dysfunction. 688 72

The contribution of ophthalmology in the diagnostic evaluation of a patient with headache is outlined. When asthenopia or an organic eye disease is cause of the headache, the ophthalmologist cannot only diagnose the etiology but can also cure the patient by adequate therapy. When the headache is sign of CNS-disease, the ophthalmologist can provide the neurologist with valuable information regarding nature and localization of the process.
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PMID:[Headache and the eye]. 712 89

Seventy-three patients with asthenopia and 43 control subjects were examined with the Pola-Test. The two populations showed a significantly different frequency of pathologic results on the four test patterns. The so-called "stereo test" seems to be the most important test pattern. Patients with a pathologic stereo pattern reported asthenopic symptoms significantly more frequently than the control subjects who were questioned for similar symptoms. However, since 30% of the asthenopic patients showed normal results on the four Pola-Test patterns, the indication for treatment can be based only on a combined evaluation of binocular tests and asthenopic symptoms. In asthenopia visual and conjunctival symptoms are more prominent than headache. At times they may be masked by psychogenic factors. In a double-blind study on 12 asthenopic patients symptoms improved significantly during treatment with prisms.
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PMID:[The Pola-test in asthenopia (author's transl)]. 742 Oct 32

A study was carried out by seven ophthalmologists practising in the Berne region on 473 patients complaining of eye strain. Medical histories were taken by questionnaire, refraction was done and phoria measured, followed by therapy in accordance with the physician's opinion. In 380 cases, glasses were prescribed, including prismatic glasses for 14 patients. In 123 cases, local medical therapy was instituted. The statistica evaluation of pre-treatment findings and results of therapy, was carried out using a computer. The principial complaints before treatment were eyestrain and visual disturbances, followed by conjunctival irritation and headache. Women complained more about headaches, men more about visual disturbances. A majority of the patients with visual disturbances needed minus lenses, while for the treatment of headaches mostly plus lenses were needed. In patients with conjunctival irritation local medical treatment resulted in additional relief of symptoms. Cylindric correction had only a minor influence on the result of therapy. Heterophoric patients did not have more complaints than orthophoric ones, and results with spectacles without prisms were the same as in orthophoric patients.
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PMID:[Asthenopia in clinical practice: a comparative study of complaints, clinical findings and results of therapy in asthenopic patients (author's transl)]. 742 Oct 33

Virtual reality (VR) has become increasingly well-known over the last few years. However, little is known about the side-effects of prolonged immersion in VR. This study set out to investigate the frequency of occurrence and severity of side-effects of using an immersion VR system. Out of 146 subjects, 61% reported symptoms of malaise at some point during a 20-min immersion and 10-min post-immersion period. These ranged from symptoms such as dizziness, stomach awareness, headaches, eyestrain and lightheadedness to severe nausea. These symptoms caused 5% of the subjects to withdraw from the experiment before completing their 20-min immersion period. Further research needs to be conducted that attempts to identify those factors that play a causative role in the side-effects of the VR system, and that looks for methods of reducing these side-effects.
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PMID:The frequency of occurrence and severity of side-effects of immersion virtual reality. 807 26

The authors report the frequency of side effects of light therapy in 105 patients with seasonal affective disorder treated with three intensities of light. Common symptoms to emerge during treatment were headache (19%), eyestrain (17%), and feeling "wired" (14%). There was no relationship between side effects and intensity of light used.
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PMID:Side effects of light therapy in seasonal affective disorder. 816 33


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