Method of corneal analysis using a checkered placido apparatus
US6450641B2 · kind B2 · utility
27Cited by
136References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Apr 9, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for analysis of the curvature of the surface of a cornea using a checkered placido comprises, projecting the image of the checkered placido onto a patient's cornea, detecting the image of the checkered placido reflected off of the cornea, detecting a plurality of nodal points from the reflected image, determining the mean curvature at a plurality of nodal points and analyzing the mean curvature at a plurality of nodal points in order to produce a graphic display of the estimated actual curvature of the cornea.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.