January 1977
Volume 16, Issue 1
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Articles  |   January 1977
Comparative reproducibility of the digital photogrammetric procedure utilizing three methods of stereophotography.
Investigative Ophthalmology & Visual Science January 1977, Vol.16, 54-60. doi:
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      A R Rosenthal, M S Kottler, D D Donaldson, D G Falconer; Comparative reproducibility of the digital photogrammetric procedure utilizing three methods of stereophotography.. Invest. Ophthalmol. Vis. Sci. 1977;16(1):54-60.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The reproducibility of digital photogrammetry of optic nervehead photographs taken with the Zeiss fundus camera with Allen stereoseparator, the Donaldson fundus camera, and the Zeiss fundus camera with twin-prism separator were evaluated. Reproducibility of the various quantitative factors was significantly better when the two types of simultantic cups. Larger per cent errors were encountered with shallower optic cups. Substantial improvements in parameter reproducibility were obtained when finer sampling intervals were used during film digitization.

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