[The effect of heavy metals (lead, cadmium, and manganese) on the function of the visual system].

The effect of the eyesight intoxication by heavy metals (lead, cadmium and manganese) is presented. The most common and dangerous forms of the eye intoxication are caused by lead additionally reinforced by cadmium. In various cases some changes in the eye may be also induced by manganese. Young organisms, as well as human embryos and fetuses are particularly vulnerable to the effect of heavy metals. Adults in general, and workers in particular, seem to develop their own system of adaptation. Nevertheless, despite the absence of clinical symptoms they should also be given regular check-ups.