Apparatus and method for generating cut surfaces in the cornea of an eye for correction of ametropia

US9943441B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Christoph Russmann · Jena, DE
• Juergen Kuehnert · Jena, DE
• Wilfried Bissmann · Jena, DE
• Gregor Stobrawa · Jena, DE

Key dates

• Filing date: Jan 31, 2017
• Grant date: Apr 17, 2018
• Expiry date: Jan 31, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00897
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method for generating cut surfaces in the cornea of an eye in order to correct ametropia using an apparatus. The method includes providing the apparatus including a laser unit, which focuses pulsed laser radiation into the cornea and moves the focused radiation in the cornea to generate cut surfaces, and a control unit, which controls the laser unit for generating cut surfaces. The method includes forming at least two mutually spaced apart cut surfaces as opening cuts by application of the pulsed laser radiation from the laser unit, each opening cut extending from an anterior corneal surface into the cornea and forming a further cut surface as a relieving cut by application of the pulsed laser radiation from the laser unit, which relieving cut extends from the anterior corneal surface into the cornea. The position and shape of the relieving cut is selected such that the relieving cut contributes to the correction of the ametropia of the eye.