Corneal endothelial cell photographing apparatus
a technology of endothelial cells and photographing equipment, which is applied in the field of corneal endothelial cell photographing equipment, can solve the problems of eye fatigue, eye fatigue, and increased eye movement involuntary, and achieve the effect of smooth endothelial image at different positions
Inactive Publication Date: 2015-08-13
NIDEK CO LTD
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- Application Information
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Benefits of technology
Enables efficient and stable acquisition of endothelial images at multiple positions, reducing eye fatigue and improving image quality by allowing for continuous, precise alignment and movement of the photographing unit relative to the eye, thereby minimizing the impact of involuntary eye movements.
Problems solved by technology
In the case of the conventional apparatuses, however, it takes long to obtain many endothelial images, resulting in a burden on an examiner and an examinee.
As represented by photographing to many sites, lengthening of an examination time causes fatigue of eyes.
Such eye fatigue increases involuntary eye movement.
This results in deterioration of photographed images.
Method used
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[0031]In the following detailed description, for purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing.
[0032]A detailed description of a preferred embodiment of embodying the present invention will now be given referring to the accompanying drawings. FIG. 1 is an external side view showing a configuration of a corneal endothelial cell photographing apparatus in the present embodiment.
[0033]An apparatus 100, which is a so-called stationary apparatus, includes a base 1, a head support unit 2 attached to the base 1, a movable table 3 provided to be movable on the base 1 by a sliding mechanism not shown, and a photographing part (a main unit) 4 provided to be movable relative to the movab...
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A corneal endothelial cell photographing apparatus comprises: a main unit including: an illumination optical system for illuminating illumination light from an illumination light source toward a cornea of an examinee's eye from an oblique direction; an imaging optical system for obtaining a corneal endothelial cell image by receiving, through an imaging element, reflection light from the cornea including corneal endothelial cells; and a fixation optical system including a plurality of fixation targets and for guiding a fixation direction of the examinee's eye; a drive unit to relatively move the main unit with respect to the examinee's eye; a serial photographing unit to obtain endothelial images in series at different photographing positions in previously set up-and-down and right-and-left directions; and a monitor to display the obtained endothelial image.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 13 / 435,864, filed on Mar. 30, 2012, pending, which claims the benefit of priority from the prior Japanese Patent Applications No. 2011-081047, filed Mar. 31, 2011 and No. 2011-081048, filed Mar. 31, 2011, the entire contents of which are incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a corneal endothelial cell photographing apparatus for photographing a cell image of the corneal endothelium of an examinee's eye.[0004]2. Related Art[0005]Conventionally, there is known an apparatus arranged to obtain a cell image of corneal endothelium in a noncontact manner by irradiating illumination light from an illumination light source to a cornea from an oblique direction and receives reflection light from the cornea by an imaging element (see Patent Document 1).[0006]Meanwhile, as the above apparatus, there are known for ...
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IPC IPC(8): A61B3/15A61B3/00
CPCA61B3/152A61B3/0041A61B3/0075A61B3/0091A61B3/1005A61B3/145
InventorHONDA, NAOTOTAKII, MICHIHIRO
OwnerNIDEK CO LTD