Patents Assigned to Keratometer Research and Development
  • Keratometer
    Patent number: 4597648
    Abstract: An improved keratometer instrument capable of measuring keratometric values of an eye is provided. An optical reference of a predetermined dimensional value is directed at the cornea of the eye and an optical sensor measures the same at different meridians. A computer circuit can determine whether the instrument is de-centered or de-focused relative to the eye and can derive measurements of keratometric values. The axis of astigmatism can be visually displayed to the surgeon during an operation.
    Type: Grant
    Filed: April 1, 1983
    Date of Patent: July 1, 1986
    Assignee: Keratometer Research and Development
    Inventors: Steven E. Feldon, Barry G. Broome, David A. Wallace