Dynamic keratometry and keratoscopy method and apparatus

Details Dynamic keratometry and keratoscopy method and apparatus Dynamic keratometry and keratoscopy method and apparatus

1977-07-05

1979-08-28

Recla, Henry J.

Surgery

Truss

Pad

128745, 128 22, 351 6, 351 16, 351 13, A61B 310

Patent

active

041657446

ABSTRACT:
A method and apparatus for performing dynamic keratometry and keratoscopy. The apparatus projects a substantially circumferentially continuous circle of light onto a cornea and the reflection from the cornea is observable in an unrefracted state through a central opening in the apparatus. Systematically varying the distance of the apparatus from the cornea does not significantly affect the sharpness of the unrefracted reflected image, affecting only its diameter so that the circle of light can be caused to pass over the entire cornea for dynamic examination of its curvature. A particular application of the apparatus is in evaluating the effects of surgery upon corneal curvature both during and after surgery. The method of the invention involves movement of a circle of light across all regions of the cornea from the center to the corneal periphery to determine curvature of the entire cornea.

REFERENCES:
patent: 3248162 (1966-04-01), Knoll
patent: 3598478 (1971-08-01), Townsley
patent: 3645609 (1972-02-01), Holmes
Hofstetter, "A Keratoscopic Survey of 13,395 Eyes", American Journal of Optometry and Archives, vol. 36, 1959 pp. 3 & 4.

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