Ophthalmic apparatus
AssigneeNidek Co., Ltd.
InventorToshifumi Sumiya
Life of this patent
Estimating the term…
Abstract
An ophthalmic apparatus used in refractive surgery for changing a radius of curvature of a cornea, the apparatus comprising a first input device for inputting data about a pre-operative corneal shape of a patient's eye, a second input device for inputting data about an intended post-operative corneal shape of the eye, a third input device for inputting data about a pre-operative MTF of an ocular imaging system of the eye, and an arithmetic device for obtaining an intended post-operative MTF of the ocular imaging system of the eye based on each inputted data.
Claims22
An ophthalmic apparatus used in refractive surgery to change a radius of curvature of a cornea, the apparatus comprising:
- first input means for inputting data about a pre-operative corneal shape of a patient's eye;
- second input means for inputting data about an intended post-operative corneal shape of the eye;
- third input means for inputting data about a pre-operative MTF of an ocular imaging system of the eye;
- and
- arithmetic means for obtaining an intended post-operative MTF of the ocular imaging system of the eye based on each inputted data.
An ophthalmic apparatus used in refractive surgery to change a radius of curvature of a cornea, the apparatus comprising:
- a corneal shape analysis unit which obtains data about a corneal shape of a patient's eye;
- an MTF measurement unit which obtains data about an MTF of a visual system and data about an MTF of a retina-brain system of the eye;
- an input unit which inputs data about an intended post-operative corneal shape of the eye;
- and
- an arithmetic unit which obtains
- a pre-operative MTF of the cornea of the eye based on the obtained data about a pre-operative corneal shape,
- a pre-operative MTF of an ocular imaging system of the eye based on the obtained data about a pre-operative MTF of the visual system and the obtained data about a pre-operative MTF of the retina-brain system,
- a pre-operative MTF of an intraocular optical system of the eye based on the obtained pre-operative MTF of the cornea and the obtained pre-operative MTF of the ocular imaging system,
- an intended post-operative MTF of the cornea of the eye based on the inputted data about the intended post-operative corneal shape, and
- an intended post-operative MTF of the ocular imaging system of the eye based on the obtained pre-operative MTF of the intraocular optical system and the intended post-operative MTF of the cornea obtained thereby.
An ophthalmic apparatus used in refractive surgery to change a radius of curvature of a cornea, the apparatus comprising:
- a memory containing a program for obtaining an intended post-operative MTF of an ocular imaging system of the eye based on data about a pre-operative corneal shape, data about an intended post-operative corneal shape and data about a pre-operative MTF of the ocular imaging system of the eye;
- and
- an arithmetic unit which performs arithmetic operation in accordance with the program.
Dependencies are inferred from the claim text.