Method for measurement of the shape and curvature of a cornea
Abstract
Abstract A METHOD AND APPARATUS ARE PROVIDED FO MEASURING THE APICAL RADIUS OF CURVATURE AND ECCENTRICITY OF A CONICOID SURFACE, SUCH AS A CORNEA OR LENS, BY SUPPORTING LARGER AND SMALLER CIRCULAR TARGETS CONCENTRIC TO THE OPTICAL AXIS OF A ELESCOPE WHICH HAS ITS OPTICAL AXIS ALIGNED WITH THE OPTICAL AXIS OF THE CONICOID SURFACE. THE TELESCOPE IS FOCUSED ON THE REFLECTED IMAGE OF THE SMALLER TARGET WHICH IS MEASURED TO DETERMINE THE APICAL RADIUS OF CURVATURE OF THE CONICOID SURFACE. THE TELESCOPE IS THEN FOCUSED ON THE REFLECTED IMAGE OF THE LARGER TARGET WHICH IS MEASURED, AND ITS SIZE AND THE DETERMINED APICAL RADIUS OF CURVATURE ARE USED TO DETERMINE THE ECCENTRICITY OF THE CONICOID SURFACE.
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| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |