Ophthalmic spectacle lenses, materials and method

Abstract

An ophthalmic spectacle lens having transmittance properties that block UV and violet light and partially block certain cyan wavelengths to enhance contrast between blue versus green and partially block certain yellow wavelengths to enhance contrast between green versus red, and keep in accordance with the tristimulus values. Adding wavelength-selective organic dyes provides the entire functional attributes of the current invention or improves the contrast-enhancing attributes provided by a glass wafer having functional rare-earth oxides, either of which improve multi-band spectrum that is balanced in blocking UV light, and adding contrast between the primary colors to optimize color-enhancing functions. When using organic dyes for all functional attributes it is possible to integrate these dyes into plastic ophthalmic materials. Some lenses are polarized. Unlike other color-enhancing sunglass lenses, this invention may help protect the eyes from over-exposure to some high-energy visible blue light, which may lead to age-related macular degeneration (AMD).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 15 / 515,589, filed Mar. 29, 2017 by Charles P. Larson and titled “Ophthalmic spectacle lenses, materials and method,” which is a national-stage entry of PCT Application No. PCT / US2015 / 047997, filed Sep. 1, 2015 by Charles P. Larson and titled “Ophthalmic spectacle lenses, materials and method,” which claims priority benefit, including under 35 U.S.C. §119(e), of U.S. Provisional Patent Application No. 62 / 105,202, filed Jan. 19, 2015 by Charles P. Larson, titled “Apparatus and method for ophthalmic spectacle lenses,” and U.S. Provisional Patent Application No. 62 / 146,558, filed Apr. 13, 2015 by Charles P. Larson, titled “Apparatus and method for ophthalmic spectacle lenses,” each of which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]The present invention relates to methods and devices for ophthalmic spectacle lenses, and in particular t...

AI Technical Summary

Benefits of technology

[0029]In some embodiments, the present invention includes a color-enhancing ophthalmic spectacle lens whose spectral values conform to those of the tri-stimulus values. In some embodiments, the color-enhancing ophthalmic spectacle lens absorbs more high-frequency visible light than other inventions in its field, while maintaining or increasing color definition with the use of transitional metal oxides, rare-earth metal oxides, and / or organic dyes. In embodiments that include a polarizing filter, this invention becomes particularly beneficial in providing the wearer with increased color definition, visual and depth perception, and acuity.

[0034]In some embodiments, the present invention uses one or more wavelength-selective light-absorbing species to provide wavelength-selective attenuation of wavelengths around 500 nm without providing wavelength-selective attenuation of wavelengths around 580 nm, such that the completed lens system enhances color separation between blue and green colors (by blocking cyan at 500 nm) without blocking yellow colors of around 580 nm. These lenses thus allow users of sunglasses and other color-enhancing ophthalmic spectacle lenses performing certain activities to see certain desired wavelengths, such as all wavelengths in the visible spectrum between green and yellow (e.g., in some embodiments, wavelengths between about 520 nm and about 600 nm are passed to about equal amounts; in other embodiments, each wavelength between about 520 nm and about 600 nm is transmitted at a level at least 80% of the average transmission of all wavelengths between about 520 nm and about 600 nm; and in some such embodiments, each wavelength between about 520 nm and about 600 nm is transmitted at a level at least 90% of the average transmission of all wavelengths between about 520 nm and about 600 nm), as well as blue wavelengths (e.g., in some embodiments, wavelengths between about 440 nm and about 480 nm are passed to about equal amounts). In some embodiments, this wavelength-selectivity that attenuates cyan colors (wavelengths around 500 nm), optionally combined with polarization in the lens, provides enhanced visibility for people fishing for, for example, yellow and blue fish, which might not be as visible to a person wearing other sunglasses that also attenuate yellow colors (wavelengths around 580 nm). In some embodiments, the wavelength-selective function attenuates at least some wavelengths between 490 nm and 510 nm to pass an amount of such light at a level that is no greater than 75% of the average amount of blue light (between 440 nm and 480 nm) passed, and also no greater than 75% of the average amount of green and yellow light (between 520 nm and 590 nm) passed; and at the same time, passes all wavelengths between 520 nm and 590 nm in an amount of at least 80% of the average amount of light passed having wavelengths between 520 nm and 590 nm. In some embodiments, the wavelength-selective function attenuates at least some wavelengths between 490 nm and 510 nm to pass an amount of such light at a level that is no greater than 50% of the average amount of blue light (between 440 nm and 480 nm) passed, and also no greater than 50% of the average amount of green and yellow light (between 520 nm and 590 nm) passed; and at the same time, passes all wavelengths between 520 nm and 590 nm in an amount of at least 80% of the average amount of light passed having wavelengths between 520 nm and 590 nm.

[0041]In some embodiments, the present invention also includes mirror coatings and / or anti-reflection coatings. If a mirror coating is desirable, the use of a two-wafer system is particularly beneficial. In some embodiments, the mirror coating is applied to the concave surface of the front wafer, which provides protection to the mirror coating from scratching or abrasion, and protects the mirror coating from separating from the lens surface. With an internal mirror coating such as this, in some embodiments, it is desirable to include an anti-reflection coating on the concave surface of the rear wafer to minimize internal reflections induced by the mirror coating. In some embodiments, the mirror coating includes a metal film. In other embodiments, the mirror coating includes a plurality of dielectric layers. In still other embodiments, the mirror coating includes both a metal film and a plurality of dielectric layers. In some embodiments, the thicknesses of the dielectric layers are chosen to reflect (and thus help block) one or more of the wavelengths in one or more of the reduced-transmittance wavelength bands.

Problems solved by technology

Such a product is unsuited for making ophthalmic spectacle lenses.

Images