Treatment apparatus for operatively correcting defective vision of an eye, method for generating control data therefor, and method for operatively correcting defective vision of an eye

US11602457B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Mark Bischoff · Jena, DE
• Gregor Stobrawa · Jena, DE
• Wilfried Bissmann · Jena, DE

Key dates

• Filing date: Jun 8, 2020
• Grant date: Mar 14, 2023
• Expiry date: Sep 23, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00872
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A treatment apparatus for operatively correcting myopia or hyperopia in an eye includes a laser device controlled by a control device and that separates the corneal tissue by applying a laser beam. The control device controls the laser device to emit the laser beam into the cornea such that a lenticule-shaped volume is isolated in the cornea. The control device, when controlling the laser device, predefines the lenticule-shaped volume such that the volume has a minimum thickness of between 5 and 50 μm. For myopia correction, the minimum thickness occurs on the edge of the volume, and for hyperopia correction the minimum thickness occurs in the region of the visual axis.