Microscope sterility system.

The problem of microscope sterility during ophthalmic microsurgery has generally been managed by using sterilizable handle protectors, or by using some form of plastic sterilizable drape for the entire microscope. Both of these systems have disadvantages. A simple and effective alternative which has been designed for Zeiss operating microscopes and can be modified for other types of instruments is presented. No modification of the microscope is required. The instrument consists of two pieces: a metal bracket which mounts in the accessory shoe of the operating microscope, and a rigid plastic sterilizable portion which is readily attached on the microscope from below with three sterilizable screws. The entire assembly can be attached within 15 seconds. It affords complete sterility protection of the operative field; it provides a sterile surface for handling and moving the microscope; it does not interfere with accessory lighting systerms; and it allows open access to external accessories such as cameras and observer tubes.