The authors point out the tests which enable the evaluation of the binocular vision in examinations qualifying for an employment in the railway service. The employees with an open angle glaucoma may continue their work under condition of controlling their visual functions in 3-months intervals. In cases of a macular degeneration examination of mesopic vision is necessary.

Adult↗

PubMedDate not supplied

[Status of the visual system in operators causing railway accidents].

One hundred and eighty four engine-drivers aged 21-60 years were examined; 91 from them provoked an accident not stopping the train in front of the "Stop" signal; 93 constituted a control group. Compared was the status of the visual system and the efficiency of the visual functions such as: binocular vision, color vision and asthenopia, mesopic vision and the sensitivity to glare. In engine-drivers of the "accident-prone" group one observed an increased sensitivity for glare. The authors suggest it would be necessary to introduce to the qualification examinations for engine-drivers the evaluation of the sensitivity to glare and of the visual ability in mesopic conditions.

Accidents, Occupational↗

PubMedDate not supplied

[Effect of high pressure sodium lamp light on color vision in persons with congenital dyschromatopsia].

20 patients with deuteranomaly, protanomaly or protanopia were tested in light of fluorescent and sodium lamp at luminosity about 350 lx and 50 lx. Sodium light increased disturbances in tone vision. moreover, 8 patients mixed up the colours of traffic-signals. These symptoms are considered to be particularly unfavourable for the traffic safety.

Adult↗