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US 6,655,805 B2Granted
Ophthalmic apparatus
AssigneeNidek Co., Ltd.
InventorMasanao Fujieda
Life of this patent
Estimating the term…
Abstract
An ophthalmic apparatus comprising a first input unit with which plural measurement data concerning an eye to be examined are inputted, a second input unit with which images of the eye including an anterior eye segment are inputted, each of the image is photographed at the time of measuring each of the inputted measurement data, and a calculation and control unit which detects and corrects two-dimensional displacement or deviation between each of the measurement data based on each of the inputted images of the eye.
Claims15
An ophthalmic apparatus comprising:
- a first input unit with which plural measurement data concerning an eye to be examined are inputted, each of the measurement data having a different characteristic;
- a second input unit with which images of the eye including an anterior eye segment are inputted, each of the images being photographed at the time of measuring each of the inputted measurement data;
- and
- a calculation and control unit which obtains a common reference point based on the inputted images, obtains two-dimensional displacement or deviation between each of the measurement data based on the obtained common reference point, and performs two-dimensional data matching of each of the measurement data.
1 more element
An ophthalmic apparatus comprising:
- a corneal shape measurement unit which measures distribution of corneal radius of curvature of an eye to be examined, the corneal shape measurement unit having
- an optical system for projecting a first measurement target onto a cornea of the eye, and
- an optical system provided with a first photographing element for detecting an image of the first measurement target formed on the cornea;
- an eye refractive power measurement unit which measures distribution of eye refractive power of the eye, the eye refractive power measurement unit having
- an optical system for projecting a second measurement target onto a fundus of the eye, and
- an optical system for detecting an image of the second measurement target formed on the fundus;
- an alignment unit which detects an alignment state of the ophthalmic apparatus relative to the eye, the alignment unit having
- an optical system for projecting an alignment target onto the cornea of the eye, and
- an optical system provided with a second photographing element for photographing an image of the alignment target formed on the cornea;
- and
- a calculation and control unit which detects and corrects two-dimensional displacement or deviation between each of data on the measured distribution with reference to at least an image of the eye including an anterior eye segment photographed by either the first photographing element or the second photographing element at the time of each measurement.
8 more elements
An ophthalmic apparatus comprising:
- a first input unit with which first measurement data concerning an eye to be examined is inputted, the first measurement data being obtained with reference to a two-dimensional reference point;
- a second input unit with which second measurement data concerning the eye is inputted together with two-dimensional alignment displacement or deviation of the eye relative to the reference point obtained by detecting an alignment state of the eye at the time of measuring the inputted second measurement data;
- and
- a calculation and control unit which performs two-dimensional data matching of each of the measurement data based on the reference point.
1 more element
An ophthalmic apparatus in which data are exchanged between at least two ophthalmic devices comprising:
- a first ophthalmic device photographing an eye to be examined including its anterior eye segment at the time of a measurement and storing a photographed image of the eye;
- a second ophthalmic device photographing the eye to be examined, including its anterior eye segment, identical to the eye photographed by the first ophthalmic device;
- a calculation unit which finds a common part to the images of the eye photographed by the first and the second ophthalmic devices and detects a two-dimensional displacement or deviation between the photographed images;
- and
- correcting means for correcting the data exchanged between the first and second ophthalmic devices based on the detected displacement or deviation.
2 more elements
Dependencies are inferred from the claim text.