Photochromic lens with bifocal film layer and preparation method for photochromic lens

Abstract

The present disclosure relates to a preparation method for a photochromic lens with a bifocal film layer. A photochromic lens with a bifocal film layer includes a substrate, a treatment layer, and a photochromic layer from inside to outside, where the photochromic layer is cured on a surface of the treatment layer by means of ultraviolet irradiation. According to the preparation method for a photochromic lens having a bifocal film layer provided in the present disclosure, a bifocal lens is used as a lens substrate, and photochromic and bifocal technologies are combined to overcome the defect of non-uniformity of a bifocal film layer caused by a spin-coating method, such that a photochromic layer can be uniformly attached to a surface of the lens substrate. Thus, uniform photochromism and excellent performance are achieved, and it can be ensured that the surface shape luminosity of the bifocal lens substrate is not affected.

Dependencies are inferred from the claim text.