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Radial keratotomy knife and system using same

  • US 4,750,489 A
  • Filed: 08/29/1985
  • Issued: 06/14/1988
  • Est. Priority Date: 08/29/1985
  • Status: Expired due to Fees
First Claim
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1. A knife system comprising:

  • a body;

    a member in said body;

    a footplate secured to said body, said footplate defining a reference location;

    a blade having a tip, said blade being axially movable and movably secured to said body so that said tip can be extended or withdrawn relative to said reference location;

    means for causing said blade to be so extended or withdrawn;

    transducer means for sensing the position of said member whose position is related to the position of said tip relative to said reference location and for providing an output signal indicative thereof;

    circuit means connected to said transducer means for providing said electrical signal to electronic means for displaying a value representative of the extension of said tip relative to said reference location; and

    a member including means structurally adapted to receive said blade therein and reflecting means for providing a reflective surface indicative of said reference location, said member further including sensing means for sensing contact between said reference location and said reflecting means to provide a basis for determining when said tip is at said reference location.

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