Ophthalmoscopic prism
US6767098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Oct 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ophthalmoscopic prism, for example a gonioscope, has an optically transparent body, the distal end carries a viewing surface preferably oriented perpendicularly to the optical axis of the body, the proximal end of the prism carries a concave surface having a curvature similar to the curvature of the cornea of a patient. The proximal end has at least one planar surface extending outwardly and distally from a location adjacent the periphery of the concave surface. The body has an index of refraction that provides total internal reflection to a viewer looking through the viewing surface even when the planar surface is at least partially wetted with a fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.