Topcon Corporation

Kabushiki Kaisha Topcon

Yoko Tatara

Takefumi Hayashi

Shunichi Morishima

Makoto Saika

Yasufumi Fukuma

Tatsuo Yamaguchi

Michiko Nakanishi

Akio Hayashi

Suguru Miyagawa

Takafumi Yukimori

An ophthalmologic apparatus includes a subjective measurement optical system configured to measure a subjective refractive value of a subject eye; an objective measurement optical system configured to measure objective refractive characteristics of the subject eye; and a controller configured to control the subjective measurement optical system and the objective measurement optical system. The controller is further configured to perform measurement of the objective refractive characteristics of the subject eye by the objective measurement optical system and perform objective monitoring to monitor objective measurement information obtained by the measurement of the objective refractive characteristics during a weakest power test in which a weakest point is being obtained by the subjective measurement optical system, a maximum visual acuity value or a set predetermined visual acuity value being readable from the weakest point.

Ophthalmologic apparatus for determining whether accommodation intervention by subject eye has occurred

An ophthalmic apparatus of an aspect example applies optical coherence tomography (OCT) to an eye, and includes an interferometer, an OCT data generating unit, an optical path length changing unit, and a processing unit. The interferometer includes a measurement arm and a reference arm. The OCT data generating unit is configured to generate OCT data based on an output from the interferometer. The optical path length changing unit is configured to change at least one of the optical path length of the measurement arm and the optical path length of the reference arm. The processing unit is configured to control the optical path length changing unit to place partial data of the OCT data corresponding to a predetermined part of the eye at a standard depth level. The standard depth level is set based on a predetermined ocular parameter value.

Ophthalmic apparatus, method of controlling the same, and recording medium

The ophthalmologic device to be coupled to a correcting device for correcting subject eyes, the correcting device including a right-left pair of two examination windows and a right-left pair of arrangement mechanisms that each arrange first optical elements, includes: a coupling member configured to be detachably coupled to each of coupled members provided on a side surface of the correcting device on a side opposite to an eyepiece side for each subject eye; a second optical element arranged at a position facing a second examination window opposite to a first examination window which is an eyepiece window, when the coupling member is coupled to the coupled member, the second optical element configured to branch a second optical path from a first optical path along the optical axes; and an objective measuring system arranged on the second optical path and configured to acquire ocular characteristics of each subject eye.

Ophthalmologic device and ophthalmologic system

An ophthalmologic apparatus includes a refractive power measurement optical system, a fixation projection system, an inspection optical system, and a controller. The refractive power measurement optical system includes a first focusing element capable of changing a focal position, and is configured to project first light onto a subject's eye and to detect returning light of the first light from the subject's eye via the first focusing element. The fixation projection system is configured to project fixation light target onto the subject's eye. The inspection optical system includes a second focusing element capable of changing a focal position in conjunction with the first focusing element, and is used for a predetermined inspection in which second light is projected onto at least the subject's eye via the second focusing element. The controller is configured to control the first focusing element and the second focusing element based on a detection result of the returning light, and to perform refractive power measurement using the first light in a state of promoting a fogging of the subject's eye by controlling the fixation projection system after performing the predetermined inspection by inspection optical system.

Ophthalmologic apparatus and method of controlling same

An ophthalmic apparatus of an exemplary aspect performs the first and second OCT scans on a subject's eye. The first OCT scan is performed on the first region including the first site of the subject's eye, and the second OCT scan is performed on the second region including the second site. The ophthalmic apparatus acquires the first deviation information of the subject's eye prior to the first OCT scan and performs alignment, and also acquires the second deviation information of the subject's eye prior to the second OCT scan and performs alignment. The ophthalmic apparatus calculates the distance between the first site and the second site based on the first data acquired through the first OCT scan and second data acquired through the second OCT scan.

Ophthalmic apparatus, controlling method thereof, and recording medium

An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and a corneal shape measurement optical system. The refractive power measurement optical system projects light onto a subject's eye via the objective lens and detects returning light from the subject's eye. The inspection optical system includes an optical scanner. The inspection optical system deflects light from a light source, projects the light deflected by the optical scanner onto the subject's eye via the objective lens, and detects returning light from the subject's eye. The corneal shape measurement optical system projects an arc-like or circumferential measurement pattern from an outer edge side of the objective lens onto the subject's eye and detects returning light from a cornea of the subject's eye. When a working distance is WD, a distance from a corneal apex of the subject's eye to a pupil of the subject's eye is d1, a distance from the pupil to a fundus of the subject's eye is d2, and a scan range by the optical scanner is SA square, a diameter of the objective lens is greater than or equal to ((WD+d1)&#xd7;SA/d2).

Ophthalmologic apparatus

An ophthalmologic apparatus includes a refractometry optical system, an OCT optical system, a fixation projection system, and a controller. The refractometry optical system is configured to project light onto a subject's eye and to detect returning light from the subject's eye. The OCT optical system is configured to split light from an OCT light source into measurement light and reference light, to project the measurement light onto the subject's eye, and to detect interference light between returning light of the measurement light from the subject's eye and the reference light. The fixation projection system is configured to simultaneously project a first fixation target and a second fixation target onto the subject's eye, a visual angle of the second fixation target being narrower than a visual angle of the first fixation target. The controller is configured to control the refractometry optical system and the OCT optical system to simultaneously perform a refractometry and an OCT measurement.

Ophthalmologic apparatus and method of controlling the same

An ophthalmologic apparatus includes an objective lens, a refractive power measurement optical system, an inspection optical system, and an optical path separating unit. The refractive power measurement optical system is configured to project light in a first wavelength range onto a subject's eye via the objective lens and to detect returning light from the subject's eye. The inspection optical system is configured to project light in a second wavelength range onto the subject's eye via the objective lens. The optical path separating unit that is arranged in an optical path of the refractive power measurement optical system and is configured to separate an optical path of the inspection optical system from the optical path of the refractive power measurement optical system by performing wavelength separation based on changeable wavelength separation characteristics.

A technology for achieving a reduction in size of an ophthalmic apparatus capable of performing a plurality of kinds of measurements performed before cataract surgery is provided. An ophthalmic apparatus is described that includes a refractive power measurement unit and an eyeball information measurement unit. The refractive power measurement unit is configured to project light from a light source onto a subject's eye and detect returning light thereof to determine refractive power of an ocular optical system of the subject's eye. The eyeball information measurement unit is configured to project light from the same light source onto the subject's eye and detect returning light thereof to determine eyeball information representing structure of the subject's eye.

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Kita-ku, Japan

Yoko Tatara