SPECTACLE LENS AND METHOD FOR PRODUCING SAME

• Main Author: NISHIMOTO Keiji
• Format: Patent
• Language: English; French; German
• Published: 01.03.2017
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CONTACT LENSES; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

An aspect of the present invention relates to a spectacle lens where at least one of an object-side surface and an eyeball-side surface has, in a lower region positioned downward from a fitting point or an optical center during use, reflection characteristics satisfying that: (1) a normal incidence average reflectance in a wavelength region of 400 to 500 nm is within a range of 1.0 to 15%; and (2) the normal incidence average reflectance is greater than a normal incidence average reflectance in the wavelength region of 400 to 500 nm in an upper region positioned upward from the lower region during use.