Comparative study of protective coating properties of CR-39-based spectacle lenses

Abstract

Abstract This research aimed to study and compare the mechanical durability and contamination resistance of organic spectacle lenses for everyday use, based on CR-39 poly(allyl diglycol carbonate) (PADC), from different manufacturers. The objects of this research are selected corrective lenses from three different manufacturers. Each examined brand is represented by a reference uncoated lens and three other lenses with different types of protective coating. Each sample has been characterized experimentally in our laboratory conditions according to three indicators of the surface: microhardness, roughness, and wetting properties. The results of this study are targeted to the eye specialists to compare the surface properties, essential for the daily usage of the spectacles, as well as the differences depending on the lens manufacturer.