Progressive lenses with reduced peripheral mean sphere
US10330950B2 · kind B2 · utility
3Cited by
19References
15Claims
0Family size
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Key dates
| Filing date | Feb 23, 2017 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Feb 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/065
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved method for configuring progressive ophthalmic lenses is disclosed. The method includes computing a traditional merit function with two changes. First, the merit function computation is limited by calculating only a preferred distance from the meridian rather than until 0. Second, an additional term is added to the merit function that calculates the mean sphere at a point that is at a reduced range from the maximum unwanted cylinder, rather than the entire range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.