The objects of the study were to determine : (1) whether United Kingdom ophthalmologists who used argon lasers had the elevation of colour-contrast thresholds previously discovered and (2) whether other users of argon lasers showed any unusual loss of colour vision.
A total of 1072 UK ophthalmologists filled in a questionnaire about their professional use of lasers, the length of time spent operating, and their out-of-doors activities.
Their colour vision was then tested by a new sensitive system, and if any abnormality was detected, a clinical eye examination was performed.
(1) Colour vision testing was shown to be reliable.
Test-retest variability was small.
Normal results did not change during the survey. (2) A number of men with high red-green thresholds were discovered.
Some were aware of their congenital insensitivity.
The frequency of all such defects was less than the known incidence of congenital colour deficiency in the male population. (3) Additionally a number of high tritan (blue-yellow) thresholds were encountered, some associated with reported diabetes and hypertension.
In other cases of this type, undetected or unacknowledged systemic disease may be present. (4) After making allowance for all these incidental causes of loss of colour vision, and for the effect of age on colour vision (which is very small) only four of the sample were>2 SD above normal. (5) However, the aver...
Mots-clés Pascal : Ophtalmologie, Médecin généraliste, Exposition professionnelle, Laser, Argon, Contraste, Couleur, Sensibilité, Seuil contraste, Royaume Uni, Europe, Questionnaire, Pratique professionnelle, Homme, Médecine travail
Mots-clés Pascal anglais : Ophthalmology, General practitioner, Occupational exposure, Laser, Argon, Contrast, Color, Sensitivity, Contrast threshold, United Kingdom, Europe, Questionnaire, Professional practice, Human, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0072375
Code Inist : 002B09N. Création : 199608.