Tonometry apparatus
US5165409A · kind A · utility
Inventor
Key dates
| Filing date | Apr 12, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Apr 12, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Apparatus for measuring pressure within an eye includes means for increasingly inwardly deforming a surface of the eye by applying a progressively increasing force onto the surface, means responsive to inward deformation of the eye surface for taking a measure related to the amount of the deformation and means for taking a measure related to the amount of the applied force at a sampling time during the progressively increasing force, and electronic means responsive to the deformation-related measuring means and the applied force-related measuring means for determining intraocular pressure from the relation between the measures. Such apparatus includes a housing; a member interposable between a surface of the eye and a portion of the housing, and frontwardly-and-rearwardly moveable with respect thereto; means associated with the housing and the member for providing a force, for example a magnetic repulsion, resisting relative rearward movement of the member so that when the member is interposed between the eye surface and the housing portion and the housing portion is moved toward the eye surface, the member front end deforms the eye surface and the member is moved rearward with res…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.