The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1994
Filed:
Oct. 30, 1992
Emeric S Bennett, Chardon, OH (US);
Other;
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.