If it is a self-adhesive paper trademark, it can be removed after being wetted with water, and the plastic can be removed directly. The remaining glue can be scraped off with your fingers. Never use a knife, it will hurt the lens.

Flat mirror is glasses with no diopter, neither myopia nor hyperopia, nor astigmatism, nor amblyopia, presbyopia and strabismus. Flat glasses have windproof and decorative functions, and some can also prevent the influence of ultraviolet or infrared rays on the eyes. As far as lens glass materials are concerned, there are light white mirror, color change mirror, coating mirror, crystal mirror, X-ray mirror and X-ray mirror.