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Stephen L. Trokel, MD; Guy D. Potter, MD

Arch Ophthalmol. 1970;83(6):698-699.

Abstract
An alignment device to facilitate taking optic canal radiographs is described. It is designed to be used as an accessory for standard radiographic head units. The device has proven to be an extremely rapid method for the preparation of symmetrically placed optic canal radiographs.

Author Affiliations
New York

From the departments of radiology (Dr. Potter) and ophthalmology (Dr. Trokel), Columbia-Presbyterian Medical Center, New York.

Footnotes
Submitted for publication Oct 16, 1969.

Reprint requests to Institute of Ophthalmology, 635 W 165th St, New York 10032 (Dr. Trokel).

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