Method of determining the astigmatic power and the power for an

Details Method of determining the astigmatic power and the power for an Method of determining the astigmatic power and the power for an

1989-10-18

1992-03-03

Shay, Randy C.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Eye prosthesis

Intraocular lens

A61F 216

Patent

active

050928805

ABSTRACT:
The astigmatic power for a toric intraocular lens which corrects the preoperative astigmatism of a patient due to a disease or the like can be determined by converting preoperative corneal astigmatic data to the intraocular lens astigmatic power. Furthermore, the intraocular lens power for a toric intraocular lens which corrects the preoperative corneal astigmatism of a patient due to a disease or the like can be determined by calculating the intraocular lens spherical and astigmatic powers from radius-of-corneal-curvature data or corneal refractive power data in the strong principal meridian direction and radius-of-corneal-curvature data or corneal refractive power data in the weak principal meridian direction.

REFERENCES:
patent: 4277852 (1981-07-01), Poler
patent: 4315336 (1982-02-01), Poler
patent: 4512039 (1985-04-01), Lieberman
Clinical Optics, Fannin et al., Butterworths, 1987, pp. V,31-35, 440.

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