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CISDOC database

Document ID (ISN)64165
CIS number 95-776
ISSN - Serial title 0300-8134 - Journal of Human Ergology
Year 1994
Convention or series no.
Author(s) Watten R.G., Lie I., Birketvedt O.
Title The influence of long-term visual near-work on accommodation and vergence - A field study
Bibliographic information June 1994, Vol.23, No.1, p.27-39. 49 ref.
Abstract A study of the influence of sustained, visual near-work on a set of oculomotor functions (ZCSV, Zone of Clear Vision) was carried out in a group of young, female accountants engaged in full-time work using a video display terminal. PRA (Positive Relative Accommodation), NRA (Negative Relative Accommodation), PRC (Positive Relative Convergence) and NRC (Negative Relative Convergence) were measured before work and at the end of the working day. There were significant reductions in the four ZCSV components over the working day; vergence reductions accounted for over 60% of the changes.
Descriptors (primary) visual function disorders; visual tasks; office work; visual display terminals; visual fatigue
Descriptors (secondary) Norway; refractive errors; disorders of ocular accommodation; oculomotor dysfunction
Document type D - Periodical articles
Country / State or ProvinceNorway
Subject(s) Occupational physiology
Broad subject area(s) Physiology, ergonomics
Browse category(ies) Diseases of the eye and vision damage
Office work
Visual display terminals (VDTs)
Fatigue