Apparatus for examination and surgery of the anterior and posterior portions of the eye

US4786161A · kind A · utility

Assignee

• Carl Zeiss Stiftung · DE

Inventors

• Ortwin Muller · Aalen, DE
• Albrecht Vogel · Oberkochen, DE
• Ulrich Lemcke · Heidenheim, DE
• Gerhard Hanemann · Oberkochen, DE
• Fritz Strahle · Heubach, DE
• Franz Muchel · Oberkochen, DE
• Erich Blaha · Oberkochen, DE

Key dates

• Filing date: Aug 1, 1986
• Grant date: Nov 22, 1988
• Expiry date: Aug 1, 2006

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/156
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In an instrument for the examination and surgery of the eye, an ophthalmological objective is combined with an operation microscope whose main objective is combined with an optical system of variable back focus and focal length. Every plane of the eye lying between the cornea and the fundus is imaged by the instrument at an intermediate image plane. In this way, with a single instrument, the operator can carry out work on the cornea, the eye lens, the vitreous body, and the retina. Since the instrument provides the observer with a reflection-free image, contact of the eye to be operated upon with an optical auxiliary means which eliminates the refractive power is unnecessary.