These instruments are designed for use in the hospital operating room or in the surgeon's office. They are excellent primary units, but at the price of back-up units in case a main surgical microscope fails. We have not applied for U.S. FDA approval, so in the U.S. they can only be used for teaching, veterinary work, etc. But they are widely accepted in other countries. The basic unit is described here.
Specialized units are available for otolaryngology, neurosurgery, eye surgery, colonic work, etc.
However, the units differ mainly in the range of magnification and the working distance. All of the scopes can be provided with floor, wall, or ceiling mounts. An articulated arm allows smooth and easy movement in any direction. Movement may be made by handles on the sides of the head, or by means of a foot unit. Pressing a button on the head moves the microscope back to the original position.