Method for determining the clyinder of an ophthalmic lens
US11409131B2 · kind B2 · utility
1Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2018 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Jan 2, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining a cylinder of an ophthalmic lens to be mounted on a spectacle frame is provided, the method including: providing a measuring device configured to run a Jackson Cross Cylinder procedure; determining components of a first vector of the cylinder in a two-dimensional vector cylinder representation; and determining components of a second vector of the cylinder in the two-dimensional vector cylinder representation, the components of the second vector of the cylinder being determined such that a Euclidian distance between the first vector and the second vector is independent of a value of the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.