Rigid gas permeable lenses
US5349394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1991 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Apr 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C2202/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of fitting rigid gas permeable contact lenses comprising the steps of: PA1 providing a set of lenses of differing BCOR values, but the same optical corrective power; PA1 fitting a patient with a lens to determine an acceptable BCOR value for the patient; PA1 determining the corrective prescription for that patient; and PA1 supplying the patient with a lens having an acceptable BCOR value and the correct prescription. The lens supplied is manufactured in the same geometry and fitting characteristics as the lens from the set used in fitting and adjusted to the correct prescription power from the fixed power by diffractive means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.