Process for reliably determining the axial length of an eye

Patent metadata

Field	Value
Publication number	US-8950866-B2
Application number	US-201314033544-A
Country	US
Kind code	B2
Filing date	Sep 23, 2013
Priority date	Sep 28, 2012
Publication date	Feb 10, 2015
Grant date	Feb 10, 2015

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.

First claim

What is claimed is:

1. A method for reliably determining the axial length of an eye by optical coherence tomography (OCT) using a measuring instrument, the eye being aligned with a fixation mark so that an optical axis of the measuring instrument coincides at least approximately with a visual axis of the eye, the method comprising:
a) determining the axial length from at least one B-scan taken in an initial AS mode (anterior segment mode);
c) determining the axial length from at…

Assignees

• Zeiss Carl Meditec Ag

Inventors

• Volkwardt Martin
• Bajramovic Ferid
• Ebersbach Ralf

Classifications

• A61B3/102 Primary

  Human Necessities · mapped topic

• A61B3/1005

  Human Necessities · mapped topic