Device and method for producing control data for the surgical correction of defective eye vision

US12220351B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Gregor Stobrawa · Jena, DE
• Mark Bischoff · Jena, DE
• Michael Bergt · Weimar, DE

Key dates

• Filing date: Jul 8, 2022
• Grant date: Feb 11, 2025
• Expiry date: Jul 8, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2009/00882
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for producing control data for a laser device for the surgical correction of defective vision. The device produces the control data such that the laser emits the laser radiation such that a volume in the cornea is isolated. The device calculates a radius of curvature RCV* to determine the control data, the cornea reduced by the volume having the radius of curvature RCV* and the radius of curvature being site-specific and satisfying the following equation: RCV*(r,φ)=1/((1/RCV(r,φ))+BCOR(r,φ)/(nc−1))+F, wherein RCV(r,φ) is the local radius of curvature of the cornea before the volume is removed, nc is the refractive index of the material of the cornea, F is a coefficient, and BCOR(r,φ) is the local change in refractive force required for the desired correction of defective vision in a plane lying in the vertex of the cornea, and at least two radii r1 and r2 satisfy the equation BCOR(r=r1,φ)≠BCOR(r=r2,φ).