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.
April 1, 1983
Date of Patent:
July 1, 1986
Keratometer Research and Development
Steven E. Feldon, Barry G. Broome, David A. Wallace