Effects of Coal Dust Contiguity on Xerophthalmia Development

Abstract

Purposes: To study the occurrence of ocular surface diseases on coal miners working under wells and to investigate the relation between xerophthalmia occurrence and coal dust contiguity. Methods: To observe the influence of coal dust to ocular surface by using Schirme to detect lacrimal gland secreting function, and breakup time of tear film (BUT)to evaluate the stability of lacrimal film and the quantity of lisozyma in lacrimal fluid. Results: These values were lower for underground coal miners than other workers no contacting coal dust, and showed negative correlation to period of their services. Conclusions: Conditions in coal miners were worse than that of other workers. Coal dust exposure plays an important role in the development of dry eye.

Keywords :

• Coal dust
• Coal miner
• Xerophthalmia