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Eye symptoms and reading abilities of computer users subjected to visually impaired direct glare
Karolinska Institutet, Sweden.
Linnaeus University, Faculty of Technology, Kalmar Maritime Academy. (Maritime Science)ORCID iD: 0000-0002-2942-1584
2019 (English)In: International Journal of Industrial Ergonomics, ISSN 0169-8141, E-ISSN 1872-8219, Vol. 72, p. 173-179Article in journal (Refereed) Published
Abstract [en]

Computer work is a visually demanding task associated with adverse eye symptoms. Frequent use of digitaldisplays is known to cause a deterioration of the so-called binocular control. Direct glare further reduces thecapacity for binocular coordination during computer work, leading to reduced reading ability and increased eyesymptoms.The purpose of this study was to investigate the effect of different luminance levels of direct glare on binoculareye movement control and reading ability in a computer work environment.Sixteen participants with normal binocular vision performed equal reading tasks in a balanced study. Threecontrolled lighting conditions of direct glare (2000, 4000 and 6000 cd/m2) were tested, in addition to no glare.After each trial, the participants answered survey questionnaires regarding their understanding of the text, aswell as their subjective experience of workload and perceived vision. Horizontal fixation disparity (FD) wasmeasured before and after the reading tasks to evaluate binocular eye movement control.When comparing the responses of visual experience, a significant difference in reported eye symptoms wasfound between lighting conditions. Based on the variation (SD), a significant difference was found within meanvalues of repeated measurements of horizontal FD and a significantly higher variation in a comparison of initialFD values measured during lighting conditions of no glare, to final measured values in all three glare conditions.Reading ability was found to be significantly negative affected with the adversity of lighting conditions.This study supports the contention that binocular eye movement control is reduced caused by direct glare.Even lower degree of disability glare caused eye symptoms. The results establish the argument that working withflat screens raises visual demands.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 72, p. 173-179
Keywords [en]
Visual ergonomics, Discomfort glare, Disability glare, Visual fatigue, Reading performance, Mental fatigue
National Category
Ophthalmology Production Engineering, Human Work Science and Ergonomics
Research subject
Natural Science, Optometry
Identifiers
URN: urn:nbn:se:lnu:diva-83398DOI: 10.1016/j.ergon.2019.05.005Scopus ID: 2-s2.0-85065866875OAI: oai:DiVA.org:lnu-83398DiVA, id: diva2:1318065
Available from: 2019-05-25 Created: 2019-05-25 Last updated: 2019-08-29Bibliographically approved

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Österman, Cecilia

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  • apa
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Language
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  • en-US
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  • nn-NB
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  • Other locale
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Output format
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