The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 2000
Filed:
Mar. 30, 1999
Nidek Co., Ltd., , JP;
Abstract
An ophthalmic apparatus for calculating ophthalmic information of an eye to be operated, then determining an amount of corneal ablation for use in surgery for correcting ametropia, based on the calculated ophthalmic information, the apparatus comprising a first input device for inputting data of a pre-operative corneal shape obtained by corneal shape measurement, a second input device for inputting data of a pre-operative refractive power obtained by objective refractive power measurement, a first calculating device for calculating data of equivalent emmetropia corneal surface refractive power which is equivalent to cause the eye to be emmetropia, based on the data of the corneal shape and the data of the refractive power, a second calculating device for calculating estimation data of a post-operative corneal shape, based on the data of the equivalent emmetropia corneal surface refractive power, a third calculating device for calculating data of the amount of corneal ablation, based on the data of the pre-operative corneal shape and the data of the post-operative corneal shape, and a display device for displaying at least one of results calculated by the first, second and third calculating devices.