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In the project of active research of occupational diseases was conducted a study on 45 welders in the engineering companies, with particular attention to the hazards of exposure to the optical radiation. The protocol used involved the execution of Breack Up test, Schirmer test, corneal staining and scraping cytology. It revealed that more than half of the welders had ocular lesions referable to their work activity as well as some permanent functional damages with the characters of dry eye syndrome. None of these diseases, which could alert for medical-legal and insurance, was highlighted by the occupational health physician.