Patent · US Active

Process for reliably determining the axial length of an eye

US8950866B2 · kind B2 · utility

1Cited by

1References

13Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Martin Volkwardt · Büdelsdorf, DE
Ferid Bajramovic · Jena, DE
Ralf Ebersbach · Schmölln, DE

Key dates

Filing date	Sep 23, 2013
Grant date	Feb 10, 2015
Priority date	—
Expiry date	Sep 23, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B3/1005
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A method for reliably determining the axial length of an eye uses optical coherence tomography (OCT), where the eye is aligned with a fixation mark so that the optical axis of the measuring instrument coincides at least approximately with a visual axis of the eye. The axial length is determined from at least one B-scan taken in an initial AS mode (anterior segment mode) and the axial length is also determined from at least one B-scan taken in a second RS mode (retina segment mode). A resultant reliable axial length of the eye is determined using the axial lengths from the AS and RS modes, where available and where possible, or the process is ended without a resultant axial length.

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