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CISDOC database

Document ID (ISN)62816
CIS number 94-1258
ISSN - Serial title 0025-7818 - Medicina del lavoro
Year 1993
Convention or series no.
Author(s) Gratton I., Piccoli B., Pierini F., Bergamaschi A.
Title Medium-term variations of visual function in VDT operators - Observation of 70 cases
Original title Variazioni a medio termine della funzionalitÓ visiva in operatori VDT - Osservazioni di 70 casi [in Italian]
Bibliographic information Nov.-Dec. 1993, Vol.84, No.6, p.482-486. 13 ref.
Abstract The aim of the study was to evaluate medium-term variations of visual functions in 70 VDT operators in function of their VDT exposure. Clinical records of the operators were reviewed in order to evaluate the variation of visual parameters (refraction, phorias, fusional convergence and divergence, stereopsis) after a 2yr follow-up. Subjects affected by hyperopia, large ametropias, or binocular vision disturbances were excluded from the study. The operators were divided into two subgroups: low exposures (n=20; <4h/day) and high exposures (n=50; >4h/day). Asthenopia was frequent in both groups. Variation of refraction and binocular vision parameters was absent or rather limited in both groups. This indicates that in subjects without significant ophthalmological problems the risk of permanent functional damage is very low at medium-term.
Descriptors (primary) visual display terminals; visual function disorders
Descriptors (secondary) cross-sectional study; asthenopia
Document type D - Periodical articles
Country / State or ProvinceItaly
Subject(s) Lighting, colour and vision
Broad subject area(s) Industries and occupations
Browse category(ies) Office work
Visual display terminals (VDTs)
Diseases of the eye and vision damage