Method and instrument for providing at least one eye of a subject with a first refraction correction and with a second refraction correction to be compared with each other
US12369790B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Jun 4, 2020 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Sep 10, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/103
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and associated instrument in which an optical system is switched from a first to a second refractive power states, to provide a first, and then a second refraction correction to an eye of a subject, the switching being carried on without interrupting a light beam coming from a target object and transmitted by the optical system to the eye of the subject. The switching is carried on in order to circumvent an intermediate refraction correction that is in between said first and second refraction corrections, or with a speed higher than a given limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.