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CISDOC database

Document ID (ISN)59833
CIS number 93-477
ISSN - Serial title 0300-8134 - Journal of Human Ergology
Year 1992
Convention or series no.
Author(s) Watten R.G., Lie I.
Title Time factors in VDT-induced myopia and visual fatigue - An experimental study
Bibliographic information June 1992, Vol.21, No.1, p.13-20. Illus. 41 ref.
Abstract In an experimental design with two matched groups (n=13 and n=17) working for 2h and 4h respectively, followed by a 15min restitution time, the study examined the effect of continuous VDT work on: (1) visual acuity, refraction and oculomotor functions (ZCSV: zone of clear, single vision) and (2) the effect of 15min restitution time on the oculomotor functions (ZCSV). In both groups there was a significant reduction in visual acuity, refraction changes in myopic direction and reduced ciliar and vergence muscle capacity. The ZCSV changes were temporary and a 15min restitution period restored approximately half of the ZCSV changes. There were no significant differences between 2h or 4h of VDT work on any of the variables examined.
Descriptors (primary) myopia; visual fatigue; visual acuity; visual display terminals; office work; computer terminals
Descriptors (secondary) physical hazards; human experiments
Document type D - Periodical articles
Country / State or ProvinceNorway
Subject(s) Lighting, colour and vision
Broad subject area(s) Occupational medicine, epidemiology
Browse category(ies) Diseases of the eye and vision damage
Office work
Visual display terminals (VDTs)