Patent ID: 7255440

Claim:
A corneal-ablation-data determining apparatus for use in keratorefractive surgery for ablating a cornea of an eye to correct a refractive error of the eye, the apparatus comprising: measurement data input means for inputting first measurement data on any one of wavefront aberration distribution of a pre-operative eye and eye refractive power distribution of a the pre-operative eye and second measurement data on a corneal surface shape of the pre-operative eye; corneal-ablation amount calculation means for calculating a corneal ablation amount based on the input first and second measurement data; and parameter input means for inputting a parameter for tilting a direction of a visual axis of a post-operative eye with respect to a direction of a visual axis of the pre-operative eye, wherein the corneal-ablation-amount calculation means calculates a corneal ablation amount by tilting the visual axis direction of the post-operative eye based on the input parameter so that a correction power which is caused by the corneal ablation amount calculated by tilting the visual axis direction of the post-operative eye corresponds to a correction power which is caused by a corneal ablation amount calculated without tilting the visual axis direction of the post-operative eye.