Patent ID: 11951041
Assignee: PHYSIK INSTRUMENTE (PI) GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 16:
17. A method for treating cataract or a refraction-based visual impairment, the method comprising:
adjusting a positioning device having two rotation drives having different diameters, and an object receiver for receiving an object, where said object receiver is coupled to a first of said two rotation drives and said first of said two rotation drives is coupled to a second of said two rotation drives, so that said object receiver is configured to be rotated about axes of rotation of both rotation drives, that are arranged parallel and offset from one another, and is adjustable in said positioning plane, wherein said first rotation drive and/or said second rotation drive is/are ring-shaped, wherein each ring-shaped rotation drive includes two rings rotatable relative to one another, one of which is formed as a stator ring and another of which is formed as a rotor ring, and wherein said first rotation drive and/or said second rotation drive is/are configured as a piezoelectric rotation drive;
arranging a light-directing element on said object receiver of said positioning device and adjusting the light-directing element in said positioning plane by way of said positioning device in order to direct a light beam onto an object to be processed by said light beam; and
acting on the cornea of a patient by way of said light beam in the form of a laser beam.