Ophthalmic spectacle lenses, materials and method
US10168553B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2015 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Sep 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/06
- WIPO fieldOptics
- WIPO sectorInstruments
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.