Noninvasive nondisruptive assessment of eyelid dynamics by means of Eddy-current no-touch sensors
US9913598B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 17, 2015 |
| Grant date | Mar 13, 2018 |
| Priority date | — |
| Expiry date | Dec 17, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2562/0257
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and processes for measurement of the eyelid movements of a subject, which explores eyelids' electrical conductivity, namely the established fact that eyelids are acting as sliding electrodes moving over the cornea, is comprised of a system for generating a high frequency weak and harmless oscillating electromagnetic field in the proximity of the eyelid movement path without interference with the vision or activity of any such subject, therefore induces so-called Eddy Currents in the eyelid, which in its turn produce its own electromagnetic field with a value depended on the eyelid position; the interaction between the basic oscillating electromagnetic field and the field generated by the eyelid is changing electromagnetic field inductance, which will be measured with very high accuracy by means of resonance sensing electronics; such systems can transmit data from its detecting electronics to a remote monitor that compels no restrictions on operator activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.