Locating the center of the entrance pupil of an eye after pupil dilation
US5740803A · kind A · utility
42Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/11
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and system are provided for locating the center of the entrance pupil of an eye after the pupil thereof has been dilated. A first image of an eye is formed prior to pupil dilation. The center of the undilated pupil is referenced to a reference image of an anatomical landmark of the eye that appears in the first image. A second image of the eye is then formed when the pupil is dilated. When the reference image is positioned on an image of the anatomical landmark appearing in the second image, the center of the undilated pupil referenced to the reference image defines the center of the entrance pupil of the eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.