Method for determining, in a natural posture, at least one geometric/physiognomic parameter associated with the mounting of an ophthalmic lens in a spectacle frame
US9195078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2011 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/11
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Method for determining, in a natural posture, at least one geometric/physiognomic parameter associated with the mounting of an ophthalmic lens in a spectacle frame intended to be worn by a wearer. The method includes: (a) capturing at least one substantially frontal image of the wearer's head; (b) determining a measured value of an angle of inclination during the capturing step, which depends on the inclination of the wearer's head about a main axis perpendicular to a sagittal plane of the wearer's head; (c) determining a reference value of the angle of inclination corresponding to a natural posture of the wearer's head; and (d) determining the required geometric/physiognomic parameter on the basis of the substantially frontal image captured and as a function of the difference between the measured value of the angle of inclination determined in step (b) and the reference value of the angle of inclination determined in step (c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.