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Cataract examination device

An inspection device, cataract technology, applied in image data processing, medical science, gonioscopy, etc., can solve problems such as lack of funds for introducing instruments, and achieve the effect of preventing measurement errors

Inactive Publication Date: 2012-08-08
NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, especially in the case of developing countries, the lack of funds for the introduction of equipment or doctors who can skillfully operate the equipment has become a problem

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0124] figure 1 It is a conceptual diagram of the cataract examination apparatus described in Embodiment 1. Such as figure 1 As shown, the cataract inspection apparatus according to Embodiment 1 is composed of a flashlight 22 that irradiates the eyeball with light from a light source as projected light, and captures the reflected light on the lens of the eyeball that has received the flashlight 22 as video data. Camera 21 and, utilize computer 23, detect the pupil portion detection function module 23a of the image area of ​​pupil portion from the image data, detect the reflection image of eyeball lens front from the image area of ​​pupil portion as reflection image detection function The module 23b is composed of the reflected image determination function module 23c which judges whether there is a reflected image behind the lens of the eyeball based on the detected image area of ​​the pupil and the reflected image in front of the lens.

[0125] As the camera 21, a general-pu...

Embodiment approach 2

[0157] In the second embodiment, the analysis of the image data described in the first embodiment will be described in detail.

[0158] Figure 14 It is a schematic flow of the cataract examination described in Embodiment 1 and processed images.

[0159] As described above, the general flow of the cataract examination described in Embodiment 1 is as follows: Figure 14 It is shown that, first, a face image is captured (please observe image a), the pupil area is extracted from the image (please observe image b), and then the reflection image in front is detected (please observe image c), and the rear reflection image (please observe image d), and then determine whether it is a cataract or not.

[0160] For image processing, see Figure 15 The following processes (a) to (n) will be described. Firstly, the pupil is extracted from the image, then the front reflection image is detected, and the rear reflection image is searched. In addition, the following symbols and Figure ...

Embodiment approach 3

[0182] Regarding Embodiment 3, the influence of the positional relationship between the imaging angle and the projection angle on the accuracy of cataract examination will be described. Figure 17 (1) to (3) are schematic views of the positional relationship between the imaging angle and the projection angle.

[0183] Figure 17 (1) shows that the camera used for shooting and the flash used for light projection are integrated, and when the shooting angle and light projection angle are at the same position, what position is more favorable for the subject to be photographed? A survey conducted on the accuracy of cataract examination. The result is as Figure 17 The range indicated by the arrow in the coordinate diagram on the right in (1), that is, the link axis between the camera / flash and the subject’s eyeball center (more precisely, the crystal center) and the eyeball (precisely, the crystal) The angle between the optical axes is within a certain range, and the inspection ...

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Abstract

Disclosed is a cataract examination device of a simple device construction that can be used to easily examine cataracts, a cataract examination method and a cataract assessment program. One embodiment of the cataract examination device of this invention is constituted by a flash (22) that projects light from a light source as projected light onto an eye, a camera (21) that picks up the distribution of reflected light of the projected light from the crystalline lens of the eye as image data, and a computer (23), wherein the computer (23) functions as a pupil-detecting means (23a) that detects a pupil image region from the image data, a reflected image-detecting means (23b) that detects a reflected image at the anterior surface of the crystalline lens of the eye from the pupil image region,and a reflected image presence assessment means (23c) that assesses the presence or absence of a reflected image on the posterior surface of the crystalline lens of the eye using the pupil image region and the reflected image at the anterior surface of the crystalline lens.

Description

technical field [0001] The present invention relates to a cataract inspection device, a cataract inspection method, and a cataract judgment program that can easily diagnose cataracts. Background technique [0002] The diagnosis of cataract is generally made by professional ophthalmologists using special instruments. In Japan and other developed countries, there are complete diagnostic equipment, which allows cataract patients to be detected and treated at an early stage. However, in many developing countries, due to lack of doctors and other reasons, the detection of cataracts is delayed, resulting in severe deterioration of symptoms, and finally blindness is not uncommon. [0003] For example, Indonesia has about 200 million people, but only about 750 ophthalmologists. In this situation, cataract patients reach about 6 million people. The diagnosis of cataracts is a very profound problem facing many developing countries. [0004] Conventionally, devices for diagnosing c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/117A61B3/13
CPCG06T2207/30041A61B3/0033G06T7/0012A61B3/1173A61B3/14
Inventor 木户出正继波部齐斯普里昂逖·雷特罗永田启
Owner NARA INSTITUTE OF SCIENCE AND TECHNOLOGY