Method and apparatus for correcting vision using an electro-active phoropter
US7264354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Nov 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An electro-active phoropter and a method of using the electro-active phoropter to measure a patient's vision prescription is disclosed. The electro-active phoropter includes a series of individually addressable electro-active lenses. The lenses have either a positive or negative optical power when an electrical potential is applied across the lens and a neutral optical power when no electrical potential is applied across the lens. Each lens provides an optical power that is part of a net optical power of the series of lenses when a patient views through the phoropter. The optical power of the phoropter can be incrementally adjusted by changing the distribution of the electrical potential across the different lenses of the series to provide increasing or decreasing optical power until a patient achieves a desired level of clarity and a vision prescription has been determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.