[Effects of petroleum derivatives and psychological stress on eye changes in prospective studies]

Prospective study of workers exposed to simultaneous action of petroleum derivatives and psychic stress proved statistically remarkable differences between the first study and control study (after two years) as related to macular degeneration and opacification of the lens. So far, the results do not seem to point to these phenomena as related to the differences of age and training period between the two groups. For the ultimate assessment of the effect of simultaneous intoxication with petroleum derivatives and psychic stress, it is necessary to confront the results of the study with those obtained after examining the control group including persons of the same age.