Two-element system to provide an ease of accommodation with variable-spherical aberration control
US8377124B2 · kind B2 · utility
66Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Nov 6, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2/1648
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In one aspect, the present invention provides a two-element ophthalmic lens in which a lateral shift of the elements relative to one another can cause a variation not only in a spherical power provided by the lens but also in spherical aberration exhibited by that lens. In some implementations, the thickness profiles of the two elements are designed such that the variation in spherical aberration is positively correlated with that of the spherical power of the lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.