Abstract
Keratorefractive surgical practice has led to a need for corneal measurement that can evaluate surgical techniques. Surgical results have been quantitated by refraction, a measure of the net diopter power of the eye, and keratometry, which estimates corneal curvature in an annular region approximately 3 mm from an undefined corneal center. Keratometry fits the complex curvature of the cornea to a spherocylindrical model and does not respect irregular astigmatism.
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© 1992 Springer-Verlag New York Inc.
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Cohen, K.L., Tripoli, N.K. (1992). Photogrammetric Index Method (PIM) System of Astigmatism Analysis and Its Use in Surgery for Astigmatism. In: Schanzlin, D.J., Robin, J.B. (eds) Corneal Topography. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-2766-3_13
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DOI: https://doi.org/10.1007/978-1-4612-2766-3_13
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