Is medical device factory coating toxic?

Not much. Coated lenses have no bad effects on the human body, it is as a medical device, coating is mainly a value-added service to make the glasses perform better and prevent more accidents. Coated lenses is the use of optical film and vacuum of the new technology, coated with a certain thickness of single or multi-layer optical film, so that the lens to obtain some new, originally do not have the excellent performance, in order to improve the ability of the lens to reflect light.