Optical instrument for examining the eye fundus
US4068932A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1976 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | May 18, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention relates to an optical instrument for examining the eye fundus which is so designed that in the optical system including an objective lens visible, targets are built for orientating the visual line of the eye to be inspected along the direction convenient for the inspection of the desired part of the eye fundus in order to be able to inspect the desired part. The visible targets are located at the position conjugate to the eye fundus with regard to the optical system including the objective lens in order that the light beam coming from the targets through the objective lens reaches the eye to be inspected. The image of the visible targets is formed on the eye fundus of the eye to be inspected while the eye to be inspected observes the visible targets through the objective lens in such a manner that the visual line is oriented in the direction along which the targets are seen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.