Ophthalmic apparatus

Details Ophthalmic apparatus Ophthalmic apparatus

1999-03-30

2000-03-07

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

606 5, 606166, A61B 310

Patent

active

060330759

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.

REFERENCES:
patent: 5102409 (1992-04-01), Balgorod
patent: 5500697 (1996-03-01), Fujieda
patent: 5658303 (1997-08-01), Koepnick
patent: 5713893 (1998-02-01), O'Donnell, Jr.
patent: 5841511 (1998-11-01), D'Souza et al.
Partial English translation of JP HEI 5-66125 (2 pages).
Partial English translation of JP HEI 8-103413 (5 pages).
U.S. application Ser No. 08/942,633.
U.S. application Ser No. 09/013,884.

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