Scaling Zernike coefficients to smaller pupil sizes for refractive treatments
US7717562B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | Mar 19, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/1015
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Wavefront measurements of eyes are normally taken when the pupil is relatively large, and the results are often represented by a set of Zernike coefficients. Different sets of Zernike coefficients can be calculated to represent aberrations at smaller pupil sizes. While recently described techniques allow scaling of the expansion coefficients with Zernike polynomials, a more intuitive approach would be desirable. Such an approach may optionally derive an equivalent result as known techniques, but may employ a much simpler and nonrecursive formula between the new and the original sets of Zernike polynomial expansion coefficients of a wavefront when the aperture size is scaled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.