Surgery – Truss – Pad
Patent
1990-04-12
1992-11-24
Aschenbrenner, Peter A.
Surgery
Truss
Pad
128648, A61B 316
Patent
active
051654091
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 respect to the housing against the resisting force; and means such as a Hall effect sensor for determining the position of the member with respect to the housing portion. Also, such apparatus further includes means associated with the member front end for determining the amount of deformation of the eye surface.
REFERENCES:
patent: 3308653 (1967-03-01), Roth
patent: 3934462 (1976-01-01), Rende
patent: 4729378 (1988-03-01), Trittenbass
patent: 4766904 (1988-08-01), Kozin et al.
patent: 4860755 (1989-08-01), Erath
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