Process for reliably determining the axial length of an eye

摘要

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.

主权项

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 least one B-scan taken in a second RS mode (retina segment mode); and determining a resultant reliable axial length of the eye using the axial lengths from the AS and RS modes, where available and where possible, or ending the process without a resultant axial length.