Surgery – Miscellaneous
Patent
1998-04-21
1999-11-02
Lacyk, John P.
Surgery
Miscellaneous
606 5, A61B 1900
Patent
active
059750847
ABSTRACT:
A method of surgically treating an eye of a patient to correct astigmatism in which values of astigmatism are measured topographically and refractively, and limit values of targeted induced astigmatism for the topographically and refractively measured astigmatism values are obtained by summating the topographically value of astigmatism with the refractive value of astigmatism and vice versa. Respective target values of astigmatism for refraction and topography based on the limit values are obtained and surgical treatment is effected with a target induced astigmatism which is intermediate the limit values and provided respective topographical and refractive non-zero target astigmatism values whose sum is a minimum.
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Cravy, T.V. "Calculation of the Change . . . " Ophthalmic Surgery, vol. 10, No. 1, Jan. 1979, pp. 38-49.
Jaffe, N.S. et al. "The Pathophysiology of Corneal Astigmatism . . . " Trans Am Acad. Opthaalmoi Otolaryngol, vol. 79, 1975 pp. 615-630.
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