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Minimum Views Required to Characterize Cataracts when Using the Scheimpflug Camera

K. Kashima, M. Unser, M.B. Datiles, B.L. Trus, P.A. Edwards

Graefe's Archive for Clinical and Experimental Ophthalmology, vol. 231, no. 12, pp. 687-691, December 1993.


We performed Scheimpflug slit lamp photography and computerized image analysis on 20 normal and 25 cataractous lenses using 18 slit images for each lens taken 10 degrees apart. The data gathered from the normals served as the reference to estimate the accuracy of representation of the cataracts by the least number of views (18 and less) using a Fourier interpolative algorithm. Using the error obtained with one view for the normals, our study suggests that the minimum number of views necessary for adequate characterization is two for cortical cataracts, two for nuclear cataracts, and six for posterior subcapsular cataracts. This information will be useful in longitudinal studies of cataracts, since most researchers presently use only one view, which may be adequate for normals but not for cataractous lenses. We found the Fourier interpolative algorithm useful in estimating the minimum views required for the current method of analyzing Scheimpflug images, and it can be easily applied to other similar images.

@ARTICLE(http://bigwww.epfl.ch/publications/kashima9301.html,
AUTHOR="Kashima, K. and Unser, M. and Datiles, M.B. and Trus, B.L.
	and Edwards, P.A.",
TITLE="Minimum Views Required to Characterize Cataracts when Using
	the {S}cheimpflug Camera",
JOURNAL="Graefe's Archive for Clinical and Experimental
	Ophthalmology",
YEAR="1993",
volume="231",
number="12",
pages="687--691",
month="December",
note="")

© 1993 Graefe's Archive for Clinical and Experimental Ophthalmology. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from Graefe's Archive for Clinical and Experimental Ophthalmology. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
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