[Comparative studies of the effects of fly ash, soil dust and clay on selected structures of the visual system of female albino rats].

Observations were carried out on 65 white she-rats. The animals received by+intraconjunctival+route a suspension of volatile ashes from ventilators of electricity works, a suspension of the soil from the area of the power-houses and a suspension of clay from clay mines. The animals exhibited marginal blepharitis and conjunctivitis appearing in the 3-5 days of investigation. The observations point to pollution of the soil of the power-house area and to the noxiousness of the investigated dusts which should be classified to the category of burdensome dusts.