Contact lens with high-order compensation for non-axisymmetric structure
US7172285B1 · kind B1 · utility
61Cited by
3References
42Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 9, 2005 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Dec 9, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Contact lenses, such as prism ballasted toric lenses, having anterior and posterior surfaces related by way of non-axisymmetric thickness variation can exhibit a third-order aberration, particularly vertical coma. A wavefront modifier, such as an aspheric surface modification, is incorporated into the lenses to at least partially compensate for the wavefront aberration associated with the non-axisymmetric thickness variation. A magnitude of the modifications can be adjusted to set a target value for any remaining wavefront aberration of the lenses based on a population-wide goal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.