Patent · US Expired

Device and method for measuring the curvature of the cornea

US4159867A · kind A · utility

25Cited by

1References

13Claims

0Family size

Assignee

Battelle Institute e.V. · DE

Inventors

Manfred Achatz · Nidderau, DE
Rasmus Beck · Neu-Isenburg, DE
Werner Bockelmann · Frankfurt am Main, DE

Key dates

Filing date	Sep 9, 1977
Grant date	Jul 3, 1979
Priority date	—
Expiry date	Sep 9, 1997

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B3/107
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A device and method are disclosed for measuring the curvature of the cornea of the human eye. The device utilizes a continuous, curved surface plate positioned in front of the eye and having a telescope extending through the surface plate such that its optical axis is aligned with the eye. Several object points are generated on the surface plate within the field of vision of the eye and are formed also on the image plane of the eye. Detection devices, located within the telescope measure the positions of such image points in relation to the optical axis. The radius of curvature of the cornea can be determined from this measurement.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.