Method and apparatus for measuring a corneal profile of an eye
US6692126B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2002 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/107
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
One or more embodiments of the present invention provide a method and apparatus to determine a corneal thickness profile of an eye. In particular, one embodiment of the present invention is a corneal diagnostic instrument including: (a) a Placido ring illuminator disposed to project a Placido ring image onto a cornea to generate a reflected Placido ring image; (b) multiple slit lamp projectors disposed to project slit light beams onto the cornea to generate slit light beam images; (c) a camera system optically disposed to detect the reflected Placido ring image and the slit light beam images; and (d) a controller, coupled to the slit lamp projectors, the Placido ring illuminator, and the camera system, to cause the slit light beam images and the reflected Placido ring image to be generated and detected in a predetermined sequence, wherein the controller is responsive to the detected reflected Placido ring image and the detected slit light beam images to determine a corneal thickness profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.