|Document ID (ISN)||62816|
|ISSN - Serial title
||0025-7818 - Medicina del lavoro
|Convention or series no.
||Gratton I., Piccoli B., Pierini F., Bergamaschi A.
||Medium-term variations of visual function in VDT operators - Observation of 70 cases
||Variazioni a medio termine della funzionalitÓ visiva in operatori VDT - Osservazioni di 70 casi [in Italian]|
||Nov.-Dec. 1993, Vol.84, No.6, p.482-486. 13 ref.
||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.
||visual display terminals; visual function disorders
||cross-sectional study; asthenopia
||D - Periodical articles
|Country / State or Province||Italy|
||Lighting, colour and vision
|Broad subject area(s)
||Industries and occupations
Visual display terminals (VDTs)
Diseases of the eye and vision damage