Method for measuring intraoperative and immediate postoperative

Details Method for measuring intraoperative and immediate postoperative Method for measuring intraoperative and immediate postoperative

1981-10-30

1986-08-19

Corbin, John K.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

046066233

ABSTRACT:
A method and apparatus for measuring the intraoperative and immediate postoperative effects of radial keratotomy are provided. Essentially, the method includes the steps of measuring the preoperative corneal thickness and radial distance along multiple meridians, plotting the preoperative internal radius of curvature of the cornea, measuring the intraoperative or immediate postoperative radial distances along multiple meridians, plotting the intraoperative or immediate postoperative internal radius of curvature and predicting the resulting anterior radius of curvature of the cornea. The apparatus of the present invention includes apparatus for illuminating the cornea, forming profile images of the cornea, measuring the radial distance and thickness along multiple meridians, plotting the preoperative and intraoperative or immediate postoperative internal radii of curvature, determining the resulting anterior radius of curvature of the cornea in any and all meridians and displaying the calculated and measured data.

REFERENCES:
patent: 3895860 (1975-07-01), Townsley
patent: 4019813 (1977-04-01), Cornsweet et al.
patent: 4157859 (1979-06-01), Terry

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