# US 2014/0152960 A1 · Instrument for examining or machining a human eye

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- Number: US 2014/0152960 A1
- Document ID: US20140152960A1
- Status: Published application
- Kind: A1
- Application number: 14/173,664
- Filed: 2014-02-05
- Published: 2014-06-05
- Earliest claimed: 2011-05-16
- Assignees: Waveligh GmbH
- Applicants: Waveligh GmbH
- Inventors: Klaus Vogler; Mario Abraham
- Web page: https://patentgrep.com/patent/US20140152960A1

## CPC

- A61B 3/113: for determining or recording eye movement
- A61B 3/10: Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B 3/102: {for optical coherence tomography [OCT]}
- A61B 3/14: Arrangements specially adapted for eye photography
- G01B 9/02063: {by particular alignment of focus position, e.g. dynamic focussing in optical coherence tomography}
- G01B 11/02: for measuring length, width or thickness (G01B11/08 takes precedence)
- G06V 40/18: Eye characteristics, e.g. of the iris
- G06V 40/19: Sensors therefor
- A61B 3/0008: {provided with illuminating means (A61B3/117, A61B3/14 take precedence)}
- A61B 3/0016: {Operational features thereof}
- A61B 3/1025: {for confocal scanning}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

An instrument is proposed for examining or machining a human eye, with an eye-tracker for acquiring eye movements and for outputting a signal that is representative of the acquired eye movements, the eye-tracker including an interferometric image-acquisition device that has been set up for time-resolved acquisition of sectional images of the eye and that operates on the basis of two-dimensional or three-dimensional optical coherence tomography, and also an evaluating module ascertaining the eye movements solely from the sectional images.

## Claims

### Claim at position 1

1-12. (canceled)

### Claim 13

A method for examining or machining a human eye, comprising:
acquiring, by an eye-tracker, eye movements;
outputting a signal that is representative of the acquired eye movements;
acquiring, by an interferometric image-acquisition device, a plurality of sectional images of the eye in a time-resolved manner;
operating, by the interferometric image-acquisition device, on the basis of two-dimensional or three-dimensional optical coherence tomography, the sectional images comprising at least one sectional image of the eye that represents a section substantially along the margin of the iris of the eye, the sectional images comprising at least two mutually orthogonal sectional images of the eye, each of the at least two mutually orthogonal sectional images representing a section substantially along a visual axis or an optical axis of the eye to capture the apex of the eye;
determining, by an evaluating module, the eye movements comprising movement of the apex from the sectional images; and
orienting an ablation profile with respect to the apex in response to the movement of the apex.

### Claim 14 (depends on 13)

The method according to claim 13, further comprising:
directing focused treatment laser radiation onto the eye; and
setting the focus location of the treatment laser radiation in response to the signal that is representative of the acquired eye movements.

### Claim 15 (depends on 13)

The method according to claim 13, the interferometric image-acquisition device characterized by a scan rate that is greater than 200,000 line scans per second.

### Claim 16 (depends on 13)

The method according to claim 13, the interferometric image-acquisition device characterized by a depth range that is greater than 8 millimeters (mm).