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CISDOC database

Document ID (ISN)30503
CIS number 79-78
ISSN - Serial title 1775-8785 - Archives des maladies professionnelles
Year 1978
Convention or series no.
Author(s) Gilet A., Grall Y., Keller J., Viénot P.A.
Title Work at computer terminals - Medical and ergonomic aspects - A study of critical frequency of fusion and evoked visual potentials
Original title Le travail sur terminal à écran - Aspects médicaux et ergonomiques - A propos d'une étude sur la fréquence critique de fusion et les potentiels évoqués visuels. [in French]
Bibliographic information June 1978, Vol.39, No.6, p.357-373. Illus. 19 ref.
Abstract Considerations on ergonomic aspects of a computer terminal operator's desk (design, layout, furnishings, suitable floor surface for ease and freedom of movement in sitting posture and when changing place, environmental lighting conditions and visual comfort) are followed by a report on a survey of 10 visual display unit (VDU) operators and 9 controls, to quantify visual strain, using the following parameters: evoked visual potentials (EVP) and critical central retinal frequency of fusion (CCRFF), measured before and after work on VDU. The results obtained were not conclusive, mainly due to lack of correlation between EVP recordings and time worked and the observance of increased CCRFF in VDU operators at the end of the day (whereas, clinically, visual fatigue usually results in lowered CCRFF). However, the concordance between observed asthenopia and the presence of oculomotor disturbance indicates the necessity for the occupational practioner to prescribe opthalmological screening tests and regular check-ups.
Descriptors (primary) visual tasks; visual display terminals; visual fatigue
Descriptors (secondary) lighting; workplace design; oculomotor dysfunction; visual comfort; comparative study; electroencephalography; photostimulation; medical supervision; critical flicker frequency
Document type -
Subject(s) Lighting, colour and vision
Broad subject area(s)
Browse category(ies) Fatigue
Office work
Visual display terminals (VDTs)