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MICHAEL S. KOTTLER, A. RALPH ROSENTHAL, DAVID G. FALCONER; Digital Photogrammetry of the Optic Nervehead. Invest. Ophthalmol. Vis. Sci. 1974;13(2):116-120.
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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.
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