Surgery – Truss – Pad
Patent
1992-10-30
1994-10-18
Sykes, Angela D.
Surgery
Truss
Pad
128652, A61B 316
Patent
active
053558847
ABSTRACT:
An apparatus for measuring intraocular pressure within an eye, includes a probe with a premeasured maximum contact area at its outer end, and the probe is associated with a signal source leading to a signal sensor, and the probe is further associated with a force sensor. In a first embodiment, the signal originates from a light source reflected from the corneal surface through the probe to a photosensor. The reflected light increases with increasing probe-corneal surface contact to give an output which, in conjunction with the force sensor output to a microprocessor, provides the pressure per unit of the maximum contact area of the probe; i.e., the intraocular pressure. In a second embodiment, an electronic signal from probe-corneal surface contact, measured by a voltmeter, is inversely proportional to probe-corneal surface contact. A microprocessor again computes the voltage output for the predetermined maximum corneal contact and, simultaneously, the force output to provide IOP.
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