Electronically controlled focusing ophthalmic device
US8545555B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2010 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/085
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
According to a first aspect, the invention relates to an electrically controlled focusing ophthalmic device (43) to be worn by a user, comprising:—at least one active liquid lens comprising a liquid/liquid interface movable by electrowetting under the application of a voltage,—a driver for applying a DC voltage to said active liquid lens, the amplitude of the voltage to be applied being a function of the desired focusing;—a sensor (41) for detecting eyelid closing events and/or microsaccades of the user;—a controller for synchronizing said sensor and the driver, such that the driver may reverse the polarization of the DC voltage during a microsaccade and/or an eyelid closing event of the user.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.