ILO Home
Go to the home page
Site map | Contact us Franšais | Espa˝ol

CISDOC database

Document ID (ISN)108660
CIS number 08-1113
ISSN - Serial title 0169-8141 - International Journal of Industrial Ergonomics
Year 2008
Convention or series no.
Author(s) Marmaras N., Nathanael D., Zarboutis N.
Title The transition from CRT to LCD monitors: Effects on monitor placement and possible consequences in viewing distance and body postures
Bibliographic information July-Aug. 2008, Vol.38, No.7-8, p.584-592. Illus. 37 ref.
Abstract This study investigates the effects of the transition from cathode ray tube (CRT) to liquid crystal displays (LCDs) with respect to viewing distance and workers' postures. The comparison between 148 workplaces equipped with CRT and 115 equipped with LCD monitors revealed that the latter are positioned closer to the rear side of desks, increasing the mean distance of the screen from the front edge of the desk by nearly 10cm. The above finding suggests that the mean effective viewing distance may have also increased by the same amount. The study also suggests that in LCD monitors, the increased viewing distance often exceeds the recommended angular height for comfortable reading while in a comfortable sitting posture. With the aid of a cybernetic model and the above empirical findings, an attempt is made to explain how the increase of the available effective space in front of the worker offered by LCD monitors may result in the adoption of adverse postures.
Descriptors (primary) visual tasks; work posture; man-computer interfaces; office work; ergonomics
Descriptors (secondary) sitting posture; visual display terminals; comfort criteria; comfort assessment; anthropometry
Document type D - Periodical articles
Country / State or ProvinceUnited Kingdom; Greece
Subject(s) Ergonomics and work organization
Broad subject area(s) New technologies
Physiology, ergonomics
Browse category(ies) Ergonomics
Office work
Work posture