Method for controlling an ophthalmic surgical laser and treatment device

The method and device use controlled laser pulses to fragment and define interfaces for easy extraction of corneal volumes, addressing the challenge of removing large objects without tissue damage and reducing surgical time.

DE102019115495B4Undetermined Publication Date: 2026-06-25SCHWIND EYE TECH SOLUTIONS GMBH
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Patent Information

Application Number
DE102019115495P0
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2019-06-07
Publication Date
2026-06-25
Estimated Expiration
2039-06-07

AI Technical Summary

Technical Problem

Existing ophthalmic surgical lasers face challenges in efficiently removing large volumetric objects from the cornea without causing damage to surrounding tissue, often requiring multiple incisions and increasing surgical time.

Method used

A method and device using a controlled pattern of pulsed laser pulses to fragment the volumetric object within the cornea, creating predefined interfaces for easy extraction, and optionally assisted by mechanical cuts, while using low-energy pulses to minimize tissue damage.

Benefits of technology

Enables efficient and precise removal of large volumetric objects from the cornea with reduced risk of tissue damage, allowing for rapid extraction and correction of refractive errors.

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Abstract

Method for controlling an ophthalmic surgical laser (18) for separating at least one volume body (12) with a predefined posterior interface (14) and a predefined anterior interface (16) from a human or animal cornea (32), comprising: - controlling the laser (18) by means of a control device (20) such that it emits pulsed laser pulses into the cornea (32) in a predefined pattern, wherein the control device (20) controls the laser beam (24) such that the volume body (12) is divided into at least two individual bodies (38, 40, 42) by means of photodisruption through an interaction of the individual laser pulses with the cornea (32), and the totality of the individual bodies (38, 40, 42) includes the posterior and anterior interfaces (14, 16) of the volume body (12), and wherein the laser (18) is controlled in this manner becomes,that at least one cut (36) or at least one opening is produced in the cornea (32) at a predefined angle and / or with a predefined geometry, wherein the cut (36) or the opening intersects an interface (14, 16) of the volume body (12) and extends to a surface (26) of the cornea (32) such that the individual bodies (38, 40, 42) of the volume body (12) can be removed from the cornea (32) via the cut (36) or the opening, and wherein the surface (26) of the cornea (32) is an artificially created surface of the eye by removing or moving an uppermost corneal layer and / or by producing a corneal flap.
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Citation Information

Patent Citations

  • High-precision material processing device

    EP1628606B1

  • Treatment device for surgically correcting ametropia of an eye and method for creating control data therefore

    EP2211803B1

  • Device and method for producing cut surfaces in the cornea of ​​an eye to correct ametropia

    DE102007019813A1

  • Method and apparatus for precision working of material

    US20040243111A1

  • Device and process for surgery on the human eye

    US20140364840A1