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Differential pressure applanation tonometer

  • US 4,860,755 A
  • Filed: 02/08/1988
  • Issued: 08/29/1989
  • Est. Priority Date: 02/08/1988
  • Status: Expired due to Fees
First Claim
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1. An applanation tonometer, comprising:

  • first and second probes for contacting the surface of an eye, the probes being arranged coaxially in a housing and being movable longitudinally with respect to one another and with respect to the housing; and

    a first sensor circuit coupled to the first and second probes and operative to sense longitudinal movement of the first probe relative to the second probe and generate a first signal in response to the relative movement,the first signal being related to the intraocular pressure of the eye.

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