Nidek Co., Ltd.

Yoshiyuki Yamada

Norimasa Satake

Yukihiro Higuchi

Yuji Murase

Masahiko Kobayashi

Mitsuo Yamamoto

Hisanari Torii

An ophthalmic observation apparatus that is capable of performing follow-up of an examinee's eye efficiently and suitably. The ophthalmic observation apparatus for observing an image of an examinee's eye that is obtained by an ophthalmic photographing apparatus includes an input device arranged to output an operation signal given by an examiner, a monitor, and a display control unit arranged to display a first image and a second image of a same portion of the examinee's eye that are obtained at different dates and times of examination on the monitor in a comparable manner, and when changing a display region of the image of the examinee's eye based on the operation signal outputted from the input device, synchronize the change of the display region between the first image and the second image.

Ophthalmic observation apparatus and ophthalmic observation program

An apparatus has an optical system detecting spectral information and having an optical scanner and a driving unit changing the optical path length by moving an optical member, a monitor, a control unit obtaining a tomographic image by performing Fourier analysis on the information and displaying the obtained image, and a unit previously setting an image on the monitor, in which the member is moved from an initial position and presence or absence of the tomographic image is determined, when the presence is detected, whether the tomographic image is normal or inverted is determined, and when the tomographic image is not the set image, the member is moved to obtain the set image, and when the tomographic image is the set image, the member is moved so that a position of the tomographic image in the depth direction coincides with a predetermined adjustment position and the driving unit is stopped.

Optical tomographic image photographing apparatus

An ophthalmic photographing apparatus comprising a photographing optical system for obtaining a regional image of an examinee's eye, comprising a light source, a focusing optical element movable in an optical-axis direction by a driving mechanism, and a photodetector, and a control unit controlling driving of the mechanism and obtain the image based on a signal from the photodetector, wherein the control unit further moves the optical element in predetermined steps/continuously to obtain the image at each position, calculates frequency distribution of luminance of each of the images to detect a change characteristic of luminance values having frequencies equal or exceeding a threshold value in the frequency distribution with respect to the optical element position, and detects a focus position of the optical element based on the change characteristics to move the optical element to a position corresponding to the detected focus position.

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Toyokawa, Japan

Yoshiyuki Yamada