# US 2021/0330501 A1 · Producing cuts in the interior of the eye

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2021/0330501 A1
- Document ID: US20210330501A1
- Status: Published application
- Kind: A1
- Application number: 17/278,312
- Filed: 2019-09-11
- Published: 2021-10-28
- Earliest claimed: 2018-09-20
- Assignees: Carl Zeiss Meditec AG
- Applicants: Carl Zeiss Meditec AG
- Inventors: Mark BISCHOFF; Gregor STOBRAWA; Dieter GREBNER
- Web page: https://patentgrep.com/patent/US20210330501A1

## CPC

- A61F 9/00825: {for photodisruption}
- A61F 9/00836: {Flap cutting}
- A61F 2009/00844: {Feedback systems}
- A61F 2009/00872: {Cornea}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

An apparatus for producing incisions in an interior of an eye. For example, the apparatus includes an image recording device that records at least part of the image field and an image evaluation device that evaluates recordings of the image recording device and produces signals for the control device and/or the operator. Furthermore, the invention relates to a method for producing incisions in the interior of an eye, wherein an image recording device is used to record at least part of the image field and an image evaluation device evaluates the recordings of the image recording device and produces signals for the control device and/or the operator.

## Claims

### Claim 1

An apparatus for producing incisions in the interior of an eye, comprising:
a laser beam source embodied to emit pulsed laser radiation (6), with
a beam optical unit which has an image field and which focuses the pulsed laser radiation into the interior of an eye at a focus located within the image field,
a beam deflection device, which displaces the focus within the image field,
a control device embodied to control the laser beam source and the beam shaping device (9) in order to produce at least one incision in the interior of the eye by specifying a trajectory,
an image recording device embodied to record at least part of the image field,
an image evaluation device embodied to evaluate recordings of the image recording device and produce signals for the control device and/or the operator.

### Claim 2 (depends on 1)

The apparatus as claimed in claim 1, wherein the laser beam source is embodied to emit pulsed laser radiation with a pulse frequency of 1.2 MHz to 10 MHz.

### Claim 3 (depends on 1)

The apparatus as claimed in claim 1, wherein the laser beam source is embodied to emit the pulsed laser radiation with a pulse energy of 1 nJ to 100 nJ.

### Claim 4 (depends on 1)

The apparatus as claimed in claim 1, wherein the focus has a maximum diameter of less than 3 μm.

### Claim 5

The apparatus as claimed in any one of the preceding claims, wherein the laser beam source is embodied to emit the pulsed laser radiation at a wavelength of 1030 nm to 1060 nm.

### Claim 6 (depends on 1)

The apparatus as claimed in claim 1, wherein the laser beam source is embodied to emit the pulsed laser radiation with a pulse length of less than 1 ps.

### Claim 7 (depends on 1)

The apparatus as claimed in claim 1, wherein the image evaluation device determines at least one parameter vector and compares the latter to a limit value vector.

### Claim 8 (depends on 7)

The apparatus as claimed in claim 7, wherein the image evaluation device determines at least one prediction for a parameter vector and compares said at least one prediction to a limit value vector.

### Claim 9

A method for producing incisions in the interior of an eye, wherein
at least one cut surface is defined in the interior of the eye,
a trajectory located in the cut surface is defined,
pulsed laser radiation in the femtosecond range at a wavelength penetrating the cornea is emitted into the interior of the eye,
a beam optical unit is used, which has an image field and which focuses the pulsed laser radiation into the interior of the eye at a focus located within the image field,
the focus is displaced in the interior of the eye and within the image field,
an image recording device is used to record at least part of the image field,
an image evaluation device evaluates the images of the image recording device and produces signals for the control device and/or the operator.

### Claim 10 (depends on 9)

The method as claimed in claim 9, wherein the image evaluation device evaluates the images from the image recording device by image recognition or image measurement.

### Claim 11 (depends on 9)

The method as claimed in claim 9, wherein the image evaluation device can recognize a movement of the eye.

### Claim 12 (depends on 9)

The method as claimed in claim 9, wherein the image evaluation device determines at least one parameter vector and compares the latter to a limit value vector and preferably determines at least one prediction for a parameter vector and compares said at least one prediction to a limit value vector.

### Claim 13 (depends on 9, 10, 11, 12)

A computer program product containing program instructions which, when executed on one or more computers, realize the method as claimed in any one of claims 9 to 12.