Tomey Corporation

Nagoya-shi, Japan

Tomey Corporation

Nagoya-shi, Japan
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An anterior eye three-dimensional (3D) image processing apparatus performs: identifying first temporary SS positions in each of at least two representative images selected from a plurality of 2D tomographic images constituting an anterior eye 3D image, each first temporary SS position indicating a space coordinate position of a scleral spur of the subjected eye; calculating a reference circle passing through at least three of the first temporary SS positions; identifying second temporary SS positions in each of at least one non-representative image on the calculated reference circle; extracting regions in a predetermined range in each 2D tomographic image, each region being centered at a corresponding one of the identified first or second temporary SS positions; identifying edge lines each of which indicating a tissue boundary that exists in each extracted region; and correcting the identified first or the second temporary SS positions based on the identified edge lines.


Patent
Tomey Corporation | Date: 2017-09-06

An ophthalmic device is provided with an illumination optical system configured to irradiate light irradiated from a light source as parallel light to a subjects eye at an oblique angle, the light source being configured to emit coherent light; an image capturing optical system comprising a light receiving element and configured to capture a reflected image by receiving first reflected light and second reflected light by the light receiving element, the first reflected light being reflected from an anterior surface of a cornea of the subjects eye, the second reflected light being different from the first reflected light and reflected from a posterior surface of the cornea of the subjects eye; and a controller configured to calculate a thickness of the cornea by using the reflected image captured by the image capturing optical system.


Patent
Tomey Corporation | Date: 2017-03-08

An ophthalmic device is configured to examine at least two eye characteristics including intraocular pressure, and the ophthalmic device includes: an examination optical system configured to obtain examination information of a subjects eye when the at least two eye characteristics of the subjects eye are examined; and an examination window configured to switch. examinations of the at least two eye characteristics. The examination optical system is arranged outside of the examination window. The examination window is capable of rotating independently of the examination optical system. The examinations of the at least two eye characteristics are switched by rotation of the examination window.


Patent
Tomey Corporation | Date: 2017-08-16

An optical coherence tomography includes a light source, a light separator, a light generator configured to generate interference light, a detector configured to detect the interference light, a first optical element, and at least one of second optical elements comprising a pair of surfaces, and performs forming a tomographic image of a subject. The first optical element is arranged on a measurement light path so as to be closest to the subject, and satisfies at least one of following conditional formulas: W: a predetermined operation distanceU: a depth of interestS: a range of interestX: a distance which is greater than W+U+S and minimal among distance(s) between the pair of surfacesZ: a shallowest position of the area of interest relative to an origin position.


Patent
Tomey Corporation | Date: 2016-09-06

An ophthalmic device is configured to examine at least two eye characteristics including intraocular pressure, and the ophthalmic device includes: an examination optical system configured to obtain information of a subjects eye when the at least two eye characteristics of the subjects eye are examined; and an examination window configured to switch examinations of the at least two eye characteristics. The examination optical system is arranged outside of the examination window. The examination window is capable of rotating independently of the examination optical system. The examinations of the at least two eye characteristics are switched by rotation of the examination window.


An anterior eye three-dimensional (3D) image processing apparatus performs: identifying first temporary SS positions in each of at least two representative images selected from a plurality of 2D tomographic images constituting an anterior eye 3D image, each first temporary SS position indicating a space coordinate position of a scleral spur of the subjected eye; calculating a reference circle passing through at least three of the first temporary SS positions; identifying second temporary SS positions in each of at least one non-representative image on the calculated reference circle; extracting regions in a predetermined range in each 2D tomographic image, each region being centered at a corresponding one of the identified first or second temporary SS positions; identifying edge lines each of which indicating a tissue boundary that exists in each extracted region; and correcting the identified first or the second temporary SS positions based on the identified edge lines.


Patent
Tomey Corporation | Date: 2017-06-07

An ophthalmological device emits light from a measurement optical system to an eye (100) to be examined and calculates a dimension along the eye axis of a target portion of the eye (100) from interfering light composed of reflected light from the eye (100) and reference light. The measurement optical system includes incidence a position changing member that changes the incidence position of light emitted to the eye (100), and a driving unit that drives the incidence position changing member so as to scan at the incidence position of emitted light in a predetermined region of the eye (100). The predetermined region is a region where a straight line passes through when the straight line radially extended from the cornea apex (110) of the eye (100) is circumferentially moved over a predetermined angle range in the case of the eye (100) is viewed from the front.


Patent
Tomey Corporation | Date: 2016-06-08

A speed measuring device with an optical coherence tomography is provided. The speed measuring device includes an optical coherence tomography that obtains an tomographic image of a sample, a motion contrast calculator, a waveform creator that creates a motion contrast wave indicating chronological change of motion contrast, a time lag calculator, a distance calculator that calculates the blood vessel distance in a sample, and a speed calculator that calculates speed of a pulse wave transmitted inside the blood vessel.


Patent
Tomey Corporation | Date: 2017-08-16

Optical coherence tomography (OCT) apparatuses (100, 200) and methods include a first electromagnetic radiation (EMR) source (101, 201) providing EMR to a first optical path associated with a sample and a second optical path associated with a reference. A multi-beam generator unit (MBGU) (MBGU) (107, 226, 400, 500, 600, 700, 900, 1000, 1100, 1200) generates first and second EMR beams having different wavelength contents. A scanning system (108, 227, 302, 311) illuminates the sample with the first and second EMR beams, at a first and second time, at a first and second location. An interference module (112; 220, 221) generates interference signals based on received EMR returning from the reference and the first and second EMR beams returning from the sample. A detector (114; 222, 223) generates detection signals based on received interference signals and a processor (115; 224, 225) generates OCT data based on the processed detection signals. In some embodiments, three EMR beams having different wavelength contents with linearly independent vectors illuminate at least one same location of the sample.


Patent
Tomey Corporation | Date: 2017-04-26

An anterior eye tomographic image capturing apparatus determining a power of an IOL (intraocular lens) is configured to acquire a tomographic image of an anterior eye along a straight line passing through a corneal apex of the anterior eye; identify a corneal apex position of the anterior eye, an equator position of a crystalline lens of the anterior eye, and a SS (scleral spur) position of the anterior eye based on the tomographic image; calculate an ELP (estimated lens position) based on a first distance from the corneal apex position to the SS position in a direction of a visual axis and a second distance from the SS position to the equator position in the direction of the visual axis; and determine the power of the IOL by using the ELP.

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