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Ophthalmologic apparatus and ophthalmologic examination method

An ophthalmic device, an ophthalmic examination technology, applied in the fields of ophthalmoscope, medical science, eye testing equipment, etc., can solve problems such as detection errors

Inactive Publication Date: 2014-05-21
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to the possibility that harmful light, such as reflection of the illumination light from the objective lens and diffuse reflection from the fundus of the eye to be inspected, etc., may be photographed at the same time, causing detection errors

Method used

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  • Ophthalmologic apparatus and ophthalmologic examination method
  • Ophthalmologic apparatus and ophthalmologic examination method
  • Ophthalmologic apparatus and ophthalmologic examination method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0035] figure 1 A structural example of a fundus camera as an ophthalmic apparatus embodying the present invention is illustrated.

[0036] On the optical axis L1, an observation light source 1 such as a halogen lamp for emitting stable light, a condenser lens 2, a filter 3 that transmits infrared light and blocks visible light, a photographic light source 4 such as an electronic flash, and a lens are arranged. 5 and reflector 6. In addition, on the optical axis L2 in the reflection direction of the reflection mirror 6 , an annular diaphragm 7 having an annular opening, a relay lens 8 , and a perforated mirror 9 having an opening at a central portion are sequentially arranged.

[0037] Further, on the optical axis L3 in the reflection direction of the perforated mirror 9 , the anterior segment observation lens 23 placed to face the subject's eye E and the objective lens 10 are arranged. In the hole of the perforated mirror 9 a photographic aperture 11 is arranged. In additi...

Embodiment ）

[0073] In addition, the present invention can be realized by performing the following processes. Specifically, software (program) for realizing the functions of the above-mentioned embodiments is supplied to a system or device via a network or any type of storage medium, and a computer (CPU or MPU) of the system or the device reads and executes the the program.

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Abstract

The invention provides an ophthalmologic apparatus and ophthalmologic examination method. The ophthalmologic examination method includes a first control step of driving a focus unit based on an index image acquired by projecting an index to an eye to be inspected in a state of setting light intensity for illuminating the eye to be inspected to a first light intensity, a second control step of driving the focus unit based on the index image acquired in a state of setting the light intensity to a second light intensity higher than the first light intensity, and a memory step of storing specific information on the eye to be inspected during the first control step and the second control step. The second control step is executed after driving the focus unit to a position stored in the memory step in the case of storing again the specific information after storing the specific information.

Description

technical field [0001] The present invention relates to an ophthalmic device, an ophthalmic examination method and a program. Background technique [0002] In fundus photography using a fundus camera, in order to capture a good fundus image, alignment adjustment for appropriately matching the positional relationship between the fundus camera and the eye to be inspected and focus adjustment on the fundus are performed before photography. [0003] Among the modes for performing observation of the anterior ocular segment of the subject's eye, and the mode for performing at least one of observation and photography of the fundus of the subject's eye, the following for focus adjustment is proposed method, which involves controlling the focus lens at a predetermined position according to the mode switched to (see Japanese Patent Application Laid-Open No. 2012-50582). [0004] Furthermore, an autofocus function has been proposed for automatically performing focus adjustment previou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/15A61B3/12
CPCA61B3/12
Inventor 藤森俊弥
Owner CANON KK