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(Investigative Ophthalmology and Visual Science. 1974;13:116-120.)
© 1974 by The Association for Research in Vision and Ophthalmology, Inc.

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Digital Photogrammetry of the Optic Nervehead

MICHAEL S. KOTTLER 1, A. RALPH ROSENTHAL 1, and DAVID G. FALCONER 1

1 Division of Ophthalmology, Stanford University Medical Center, Stanford, Calif. 94305, and the Electronics and Bioengineering Laboratory, Stanford Research Institute, Menlo Park, Calif. 94025

A digital photogrammetric procedure for quantitatively analyzing optic-cup topography has been developed and evaluated. Stereopairs taken with the Zeiss Fundus Camera and the Allen Stereoseparator have been digitized and processed with a general purpose digital computer. A depth sensitivity of 184 µ has been obtained. The following parameters were analyzed for reproducibility: cut depth, cup width, profile area, and cup volume. Photographic error was found to be 7 to 20 times greater than photogrammetric error.

Key Words: stereophotogrammetry • optic nervehead • optic-cup topography • glaucoma

Submitted on August 13, 1973
Accepted on October 1, 1973






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