Ophthalmic surgical microscope

US11147447B2 · kind B2 · utility

Assignee

• Carl Zeiss Meditec AG · DE

Inventors

• Markus Seesselberg · Aalen, DE
• Christoph Hauger · Aalen, DE
• Artur Hoegele · Oberkochen, DE
• Joachim Steffen · Lauchheim, DE

Key dates

• Filing date: Jul 30, 2019
• Grant date: Oct 19, 2021
• Expiry date: Mar 15, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/13
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An ophthalmic surgical microscope includes a main objective lens, through which an observation beam path passes, and a confocal optical system configured as a refractometer to determine the refraction of an eye. The optical system includes a measurement light source to generate a measurement light beam, a light detector to measure an intensity of measurement light and an optical unit to direct the measurement light beam onto the retina of the eye and to return measurement light reflected back at the retina to the light detector. The optical system includes an adaptive optical module (AOM) to modify a wavefront of the measurement beam path such that an intensity of the back-reflected measurement light changes. A spherical equivalent (SE) of the ametropia of the eye is determined based on a setting of the AOM, at which the measured intensity of the back-reflected measurement light has a maximum.