System and method for determining a rounded value of an optical feature of an ophthalmic lens adapted to provide a dioptric correction for improving the vision of a subject
US12366502B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2021 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Jan 17, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system for determining a rounded value of an optical feature of an ophthalmic lens including determining a first test value and a first variation increment, performing a first trial of said subjective test wherein two first different optical situations are determined based on at least the first test value, determining a second test value based on the first test value, on the first variation increment and on the result of the first trial, performing a second trial of said subjective test wherein two second different optical situations are determined based on at least the second test value, determining an intermediary value based on the result of the first trial and on the result of the second trial, and determining said rounded value by rounding said intermediary value to a reference value, said rounding modifying the dioptric correction of said ophthalmic lens by less than a predetermined basic dioptric value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.