Patent ID: 7125405

Claim:
A method for calculating an ablation amount for refractive correction in corneal refractive surgery to be achieved by ablating an optical zone of a cornea of an eye to be operated with a laser beam, the method comprising: a first step of inputting data necessary for correcting simple myopic astigmatism or mixed astigmatism; and a second step of dividing a total ablation amount into a first ablation amount for myopic astigmatism correction and a second ablation amount for hyperopic astigmatism correction based on the inputted data in accordance with a given standard, in the myopic astigmatism correction, a portion of the cornea closer to a weak principal meridian being ablated more and a portion of the cornea farther from the weak principal meridian being ablated less, and in the hyperopic astigmatism correction, a portion of the cornea closer to a strong principal meridian being ablated less and a portion of the cornea farther from the strong principal meridian being ablated more.