WO2015176573A1 - 双盲设计的电子视力检测系统 - Google Patents

双盲设计的电子视力检测系统 Download PDF

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WO2015176573A1
WO2015176573A1 PCT/CN2015/074021 CN2015074021W WO2015176573A1 WO 2015176573 A1 WO2015176573 A1 WO 2015176573A1 CN 2015074021 W CN2015074021 W CN 2015074021W WO 2015176573 A1 WO2015176573 A1 WO 2015176573A1
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module
visual
processor
infrared
display
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PCT/CN2015/074021
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English (en)
French (fr)
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何明光
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何明光
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
    • A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
    • A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors

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  • the invention relates to a vision detecting device for a human eye, in particular to a double-blind design electronic vision detecting system.
  • Vision examination is a basic examination that every patient attending an ophthalmology department must complete.
  • the visual acuity directly affects the doctor's diagnosis thinking, the opening of the auxiliary examination, the correct diagnosis and treatment measures. Therefore, the accuracy of the vision examination is diagnosed and processed.
  • the visual acuity examination mode is unified: the subject faces a certain distance of the eye chart, and the physician points to a certain visual target (usually the "E" character), allowing the subject to discern the opening direction of the "E” word until it can be discerned.
  • the minimum visual standard the physician records the corresponding visual acuity.
  • This type of visual inspection mode requires checking the cooperation of the doctor and the subject, and there is an information bias of the examiner. For example, in vision examination, this situation is often encountered: the subject can identify all 5 visual targets in the 0.6-line chart, 0.7 can identify 3-4 of the 5 visual targets, and 0.8 in 5 visual targets. It is difficult to identify only 1-2. If you encounter a very patient doctor, the subject may guess 3 or more of 0.8 lines.
  • the eyesight is recorded as 0.8; if the doctor is not patient enough , the visual acuity record is 0.7, or even only 0.6.
  • this relatively rough visual inspection method is used clinically, and he can satisfy ordinary ophthalmic medical services.
  • the present invention provides an electronic vision detection system with a double-blind design that is convenient to use and accurate in detection.
  • the system is independently completed by the subject without the participation of a doctor, and the visual result is independently stored in the processor.
  • a double-blind electronic vision detection system comprising hardware and software, the hardware consisting mainly of an eye shield, an infrared emitter, an infrared receiver, a handheld controller, a processor, a barcode reader and a visual indicator display,
  • the eye-shading plate is mainly composed of an eye-shielding body and a handle, a power control switch and a battery, and the handle is fixedly connected with the eye-shielding body.
  • the battery is disposed in the handle for supplying power to the infrared emitter, and the power control switch is disposed on the handle for performing switch control on the infrared emitter, wherein the infrared emitter is provided with multiple, multiple infrared rays
  • the transmitter is spaced apart at a periphery of the eye shield body;
  • the infrared receiver is disposed on the visual indicator display, and the infrared receiver is configured to receive the infrared signal emitted by the infrared emitter and transmit it to the processor, and the processor calculates the infrared signal a real-time distance between the ophthalmoscope and the optotype display;
  • the handheld controller is configured to transmit the selection result of the optotype to the processor, and the panel of the handheld controller is provided with a center button and a periphery of the center button Determining four directions of up, down, left, and right directions of the direction of the optotype, the center button is a start test button and a
  • the identity recognition module reads the barcode information by using a barcode reader, and converts the barcode information into the identity information of the patient;
  • the visual target progressive module performs progressive selection according to the correct number of key results of the handheld controller, and issues an instruction to the visual target display module;
  • the visual target display module displays the visual targets of different viewing angles according to the instructions, and highlights the measured visual targets from left to right, and automatically jumps to the next case when the patient makes a selection or uses for more than 5 seconds.
  • the dynamic distance measuring module calculates a distance between the eye shield and the visual indicator display according to the relative positions of the plurality of infrared emitters sensed by the infrared receiver, and transmits the distance information to the vision conversion module;
  • the vision conversion module comprehensively calculates the detection result of the vision according to the correct number of selection results sent by the dynamic distance measurement module, the visual progression module and the handheld controller, and saves the result by the storage module.
  • the standard distance for visual acuity detection is 4 meters. Subjects can approach the screen at will, and can't exceed 1 meter in the near future. After completing a line of visual inspection, the conversion is based on the dynamic distance at that time. For example, if the subject recognizes 1.0 line of visual acuity at 3 meters, it is recorded as visual acuity of 0.75;
  • the storage module can be automatically stored in association with patient information.
  • the periphery of the eye-shading plate body is provided with a fixed column radially arranged, one end of the fixing column is connected with the eye-shielding body, and the infrared emitter is fixed at the other end of the fixing column.
  • the fixing column has a length of 8 to 12 cm and a diameter of 0.8 to 1.2 mm.
  • the infrared emitter is provided with four.
  • the handle is a round rod-shaped structure made of stainless steel material, and has a diameter of 6 to 10 cm and a length. It is 18 to 22 cm.
  • a Bluetooth information transmission manner is adopted between the infrared receiver and the processor.
  • the hardware further comprises three blank interim frames with different interpupillary distances, and a blank audition frame for use in myopic patients during the optician.
  • the software further includes a rolling timing module, and a rolling timing module, configured to display a time-limited 5 second time-lapse scroll bar in the lower part of the screen display area of the visual indicator display, and the color gradually deepens as time decreases, and the timing scroll bar scrolls.
  • the scrolling timing module activates the optotype progressive module to cause the optotype to jump to the next optotype to be tested.
  • the present invention Compared with the prior art, the present invention has the following advantages: the present invention displays different sizes of visual targets through the visual indicator display, and the subject can independently select the discrimination time and the inspection distance within a certain range, not only without the doctor's participation, but also the patient himself. I don't know what the specific visual value is represented by the optotype. The final visual result is stored in the processor, and the information bias from the tester and the subject is excluded.
  • the present invention adopts the principle of double-blind design and autonomously views through the controller. Target selection/visual test, which can more accurately reflect the true vision of the subject, can provide the most basic guarantee for clinical research in ophthalmology.
  • Figure 1 is a schematic view of the structure of the present invention
  • FIG. 2 is a view showing an operation state of the visual indicator display shown in FIG. 1;
  • FIG. 3 is a schematic structural view of the eye shield shown in FIG. 1;
  • FIG. 4 is a schematic structural view of the handheld controller shown in FIG. 1;
  • Figure 5 is a flow chart showing the software program of the present invention.
  • the double-blind electronic vision detection system includes hardware and software, and the hardware mainly consists of an eye-block 1, an infrared emitter 2, an infrared receiver 3, a handheld controller 4, a processor 5, and a barcode.
  • the reader 6 and the visual indicator display 7 are constructed.
  • the barcode reader 6 is configured to scan the barcode of the identity information on the case of the subject, And transmitting the identity information barcode to the processor, the processor of the embodiment adopts a notebook computer, and the identity information of the tested person including the name, gender, and age can be automatically displayed on the right side of the laptop screen after the scanning is completed.
  • the display bar there are two options under the display bar, “Retest Once” and “End Test” for the subject to select.
  • the processor 5 transmits the information of the selected "E" target to the visual display 7 for display.
  • the storage module can be automatically stored in association with patient information.
  • the visual indicator display 7 adopts a 27-inch full HD resolution screen with an aspect ratio of 16:9, and its background is white, and the vertical ground placement height is substantially the same as the height of the subject's eyes.
  • the visual display is powered by a 220v AC power supply.
  • the visual display 4 is associated with the processor 5 via Bluetooth and displays five black "E" visual targets of a different viewing angle size at a time according to the software system instructions; the visual display 7 is displayed below the "E" visual target There is a timing scroll bar 22.
  • the infrared receiver 3 is disposed on the visual indicator display 7.
  • the infrared receiver 3 is configured to receive the infrared signal of the infrared emitter 2, and the infrared receiver 3 transmits the infrared signal to the processor 5 by means of Bluetooth information transmission.
  • the processor 5 uses an infrared signal to calculate the distance between the eye shield and the visual display.
  • the infrared receiver 3 is powered by a 220v AC power source, and the four indicators are fully illuminated after power-on. After the infrared receiver is successfully associated with the processor, the four indicators flash alternately in an orderly manner.
  • the eye-shading plate 1 is mainly composed of an eye-shielding body 8 and a handle 9, a power control switch 10 and a battery 11.
  • the handle 9 is fixedly connected to the eye-shielding body 8, and the battery 11 is disposed on the handle.
  • 9 for providing power to the infrared emitter 2 the power control switch 10 is disposed on the handle 9 for performing on-off control of the infrared emitter 2
  • the infrared emitter is provided with four
  • the periphery of the plate body 8 is provided with four fixing posts 12 radially arranged.
  • One end of the fixing post 12 is connected to the eye shield body 8, and four infrared emitters 2 are respectively fixed to the other ends of the four fixing posts 12.
  • the fixing column has a length of 8 to 12 cm and a diameter of 0.8 to 1.2 mm.
  • the battery 11 is a lithium battery No. 5.
  • the handheld controller 4 is configured to transmit the selection result of the optotype to the processor 5.
  • the panel of the handheld controller 4 is provided with a center button and a periphery of the center button for determining the optotype.
  • the four direction buttons 14 of the up, down, left, and right directions of the direction are the start test button and the confirmation button 13 that cannot determine the direction of the target.
  • the hardware also includes three blank interim frames with different interpupillary distances, and a blank audition frame for use in myopic patients during the optician.
  • the software installed in the processor is mainly composed of an identity recognition module 15, an optotype display module 16, an optotype progressive module 17, a dynamic distance measurement module 18, a vision conversion module 19, and a storage module 20:
  • the identity recognition module 15 reads the barcode information by using the barcode reader 6, and converts the barcode information into the patient's body. Information
  • the visual target progressive module 16 performs progressive selection according to the correct number of key results of the handheld controller, and issues an instruction to the visual target display module;
  • the visual target display module 17 displays the visual targets of different viewing angles according to the instructions, and sequentially displays the measured visual targets from left to right, and automatically jumps to any case when the patient makes a selection or uses more than 5 seconds.
  • the dynamic distance measuring module 18 calculates a distance between the eye shield and the visual indicator display according to the relative positions of the four infrared emitters sensed by the infrared receiver, and transmits the distance information to the vision conversion module;
  • the vision conversion module 19 comprehensively calculates the detection result of the vision according to the correct number of selection results sent by the dynamic distance measurement module, the visual progression module, and the handheld controller, and saves the result by the storage module 20.
  • the standard distance for visual acuity detection is 4 meters. Subjects can approach the screen at will, and can't exceed 1 meter in the near future. After completing a line of visual inspection, the conversion is based on the dynamic distance at that time. For example, if the subject recognizes 1.0 line of visual acuity at 3 meters, it is recorded as a visual acuity of 0.75.
  • the software further includes a rolling timing module 21, and a rolling timing module 21 is configured to display a time-limited 5 second time-lapse scroll bar 22 in the lower portion of the screen display area of the visual indicator display 7, and the color gradually deepens as time passes.
  • the scroll timing module activates the optotype progressive module to cause the optotype to jump to the next optotype to be tested.
  • the method of implementing progressive detection using the double-blind electronic vision detection system is as follows: the specification of the optotype is the same as the ETDRS visual acuity chart. There are 12 levels, which are 1.6, 1.2, 1.0, 0.9, 0.8, 0.7, 0.6, 0.5, 0.4. , 0.3, 0.2, 0.1; each time the line of sight of the ETDTS chart is displayed on the optotype display, the optotype being detected is displayed as the highest contrast, and the other optotypes in the line are displayed in a low contrast manner; The progressive mode starts from the maximum visual scale of 0.1.
  • the line If more than 4 can be identified, it is just considered to pass the line, and then start the progressive progression, from 0.4 to 0.7 to 1.0; if at one of the levels If 4 or more optotypes are not recognized, then the adjacent larger optotype lines are returned. For example, if more than 4 optotypes are not recognized in the 0.7 level line, the 0.6 level optotype line is returned to the upper level 0.6 level. If the line of sight is still not recognized, then it will be returned to the first level, that is, level 0.5, and so on, until it can recognize more than four targets of the line.
  • the integrated dynamic distance measurement results the actual measured visual acuity. If the visual acuity is greater than or equal to 1.0 at 4 meters, the system stops testing and prompts. The subject began to test left eye vision; if the visual acuity at 4 meters was less than 0.1, the subject moved forward until the visual target was visible, and the system automatically converted the visual acuity (if you can see it when you move it to the screen X meters, the vision If it is 0.25X), if you can't see the first line of sight in one meter, you will start measuring the index manually or photo-sensing.
  • the system prompts the patient to move forward arbitrarily. Distance (moving less than 3 ) Retest retest after two subject may choose to continue or end the testing retest left-turn test.
  • the system takes the best visual acuity of all measurements as the subject's true visual acuity value and stores it in the storage module in association with the subject's identity information. In the same way, the left eye is detected. After measuring the visual acuity of 4 meters in the detection process, the subject is allowed to move back and forth within the marked range. It is necessary to test with the conventional visual acuity that the subject cannot turn the head and blink sharply.

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Abstract

一种双盲设计的电子视力检测系统，其特征在于：包括硬件和软件，硬件主要由遮眼板（1）、红外线发射器（2）、红外线接收器（3）、手持控制器（4）、处理器（5）、条形码读取器（6）和视标显示器（7）构成；安装在处理器（5）中的软件，主要由身份识别模块（15）、视标显示模块（16）、视标递进模块（17）、动态距离测量模块（18）、视力换算模块（19）和存储模块（20）构成。该检测系统通过视标显示器（7）显示不同大小的视标，受试者在一定范围内可以自主选择辨别时间和检查距离，无需医生参与，同时受试者检测过程中也无法得知目前正在检测的视力行代表的视力具体值为多少，排除了来自测试者和受试者的信息偏倚；该检测系统采取双盲设计的原理，自主进行视标选择/视力测试，从而能更精确的反映受试者的真实视力。

Description

双盲设计的电子视力检测系统 技术领域
本发明专利涉及一种人眼的视力检测设备，具体是一种双盲设计的电子视力检测系统。
背景技术
视力检查是每个就诊于眼科的病人必须完成的一项基本检查，视力结果直接影响医师的诊断思维、辅助检查的开处、正确诊断和治疗措施，因此保证视力检查的准确性是诊断和处理眼科疾病的最基本和最重要的环节。
目前视力检查模式统一为：受试者面对一定距离的视力表，医师指点某个视标(通常是“E”字)，让受试者辨别“E”字的开口方向，直至能辨别的最小视标，医师记录其相对应的视力大小。该种视力检查模式需要检查医生和受试者的配合，存在检查者的信息偏倚(bias)。例如在视力检查中经常会遇到这样的情况：受试者能辨别视力表0.6行全部5个视标，0.7行能辨别5个视标中的3-4个，0.8行5个视标中只能辨认1-2个，比较困难，若遇到一个非常耐心的检查医生，受试者可能猜中0.8行的3个或以上，此时的视力则记录为0.8；如果检查的医生耐心不够，则视力记录为0.7，甚至只有0.6。目前临床上都是用这种相对较粗略的视力检查方法，他能满足普通的眼科医疗服务。
近年来，随着循证医学的兴起，临床上出现了越来越多的随机对照研究，而在这种临床科学研究中，一个精准的视力检查和避免由于检查者产生的信息偏倚(bias)就显得非常重要。例如比较某种新药和一种传统药物玻璃体腔注射治疗老年性黄斑变性，观察两组对视力提高的效果，实验组医生检查视力会非常耐心，从而可能高估其视力，也就影响了药物治疗效果的评价。因此在现代临床科学研究中，急需一种无须医生参与的、双盲的设计的、可以精确反映受试者视力的视力表。
发明内容
针对上述不足，本发明专利提供了一种使用方便、检测精确的双盲设计的电子视力检测系统，该系统，无须医生参与，受试者独立完成，视力结果独立保存于处理器中。
本发明的技术方案如下：
双盲设计的电子视力检测系统，包括硬件和软件，所述硬件主要由遮眼板、红外线发射器、红外线接收器、手持控制器、处理器、条形码读取器和视标显示器构成，所述遮眼板主要由遮眼板本体和手柄、电源控制开关和电池构成，手柄与遮眼板本体固定连接， 所述电池设在手柄内，用以给红外线发射器提供电源，所述电源控制开关设在手柄上，用以对红外线发射器进行开关控制，所述红外线发射器设有多个，多个红外线发射器间隔分布在遮眼板本体的周边；所述红外线接收器设在视标显示器上，红外线接收器用以适时接收红外线发射器发射的红外信号并传递给处理器，处理器通过红外信号以计算出遮眼板与视标显示器的实时距离；所述手持控制器，用以将视标的选择结果传送给处理器，手持控制器的面板上设有一个居中按键以及设在居中按键周边的用以判定视标方向的上下左右的四个方向按键，所述居中按键为开始测试按键以及无法判断视标方向的确认键；所述条形码读取器，用来扫描被测者病例上的身份信息条码，并将身份信息条码传送给处理器，处理器将所选择的“E”字视标的信息传送给视标显示器进行显示；安装在处理器中的软件，主要由身份识别模块、视标显示模块、视标递进模块、动态距离测量模块、视力换算模块和存储模块构成：
所述身份识别模块，利用条码读取器读取条码信息，并将条码信息转换为患者的身份信息；
所述视标递进模块，根据手持控制器的按键结果的正确个数进行递进选择，并向视标显示模块发出指令；
所述视标显示模块，根据指令显示不同视角大小的视标，从左到右依次高亮显示被测视标，在患者做出选择或者用时超过5秒的任一情况下自动跳转到下一个视标；
所述动态距离测量模块，根据红外线接收器感应到的多个红外线发射器的相对位置计算遮眼板与视标显示器的距离并将距离信息传递给视力换算模块；
所述视力换算模块根据动态距离测量模块、视标递进模块和手持控制器发出的选择结果的正确个数综合计算出视力的检测结果，并通过存储模块保存。视力检测的标准距离为4米，受试者可以随意走近屏幕，最近不能超过1米，当完成某一行视力检查后，根据其当时的动态距离，进行换算。例如，受试者在3米处，辨认了1.0行的视力，则记录为视力为0.75；
所述存储模块，能自动与患者信息关联存储。
进一步地，所述遮眼板本体的周边设有呈放射状分布的固定柱，固定柱的一端与遮眼板本体连接，所述红外线发射器固定在固定柱的另一端。
进一步地，所述固定柱的长度为8～12cm，直径为0.8～1.2mm。
进一步地，所述红外线发射器设有四个。
进一步地，所述手柄是由不锈钢材料制成的圆杆状结构，其直径为6～10cm，长度 为18～22cm。
进一步地，所述红外线接收器与处理器之间采用蓝牙信息传送的方式。
进一步地，所述硬件还包括三种不同瞳距的空白试镜框，空白试镜框，用于近视患者在配镜时使用。
进一步地，所述软件还包括滚动计时模块，滚动计时模块，用以在视标显示器的屏幕显示区下部显示一个限时5秒的计时滚动条，随着时间的减少颜色逐渐加深，计时滚动条滚动结束时，滚动计时模块启动视标递进模块，使视标跳转到下一个被测视标。
本发明的有益效果：
本发明与现有技术相比，具有如下优点：本发明通过视标显示器显示不同大小的视标，受试者在一定范围内可以自主选择辨别时间和检查距离，不仅是无需医生参与，患者自己也不知道视标代表的具体视力值是多少，最终视力结果保存于处理器中，排除了来自测试者和受试者的信息偏倚，本发明采取双盲设计的原理，自主通过控制器进行视标选择/视力测试，从而能更精确的反映受试者的真实视力，可以为眼科临床研究提供最基本的保障。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细说明：
图1为本发明的结构示意图；
图2为图1所示视标显示器的工作状态图；
图3为图1所示的遮眼板的结构示意图；
图4为图1所示的手持控制器的结构示意图；
图5为本发明的软件程序的流程框图。
图中：1、遮眼板；2、红外线发射器；3、红外线接收器；4、手持控制器；5、处理器；6、条形码读取器；7、视标显示器；8、遮眼板本体；9、手柄；10、电源控制开关；11、电池；12、固定柱；13、确认键；14、方向按键；15、身份识别模块；16、视标显示模块；17、视标递进模块；18、动态距离测量模块；19、视力换算模块；20、存储模块；21、滚动计时模块；22、计时滚动条。
具体实施方式
如图1所示，双盲设计的电子视力检测系统，包括硬件和软件，所述硬件主要由遮眼板1、红外线发射器2、红外线接收器3、手持控制器4、处理器5、条形码读取器6和视标显示器7构成。所述条形码读取器6，用来扫描被测者病例上的身份信息条码， 并将身份信息条码传送给处理器，本实施例的处理器采用的是笔记本电脑，扫描完成后被测者的各项身份信息包括姓名、性别、年龄均可自动显示在笔记本电脑屏幕的右侧显示栏内，显示栏下方有两个选项“重测一次”“结束测试”用来供被测者选择。处理器5将所选择的“E”字视标的信息传送给视标显示器7进行显示。所述存储模块，能自动与患者信息关联存储。
如图2所示，视标显示器7采用27寸全高清分辨率屏幕，长宽比为16:9，其背景为白色，垂直地面放置高度与受测者双眼高度基本一致。视标显示器采用220v交流电源供电。视标显示器4通过蓝牙与处理器5相联系并依据软件系统指令每次显示一行不同视角大小的五个黑色“E”字视标；视标显示器7上且位于“E”字视标的下方显示有计时滚动条22。所述红外线接收器3设在视标显示器7上，红外线接收器3用以适时接收红外线发射器发射2的红外信号，红外线接收器3以蓝牙信息传送的方式将红外信号传递给处理器5，处理器5通过红外信号以计算出遮眼板与视标显示器的距离。红外线接收器3依靠220v交流电源供电，通电后4个指示灯全亮。红外线接收器与处理器关联成功后4个指示灯有序交替闪烁。
如图3所示，所述遮眼板1主要由遮眼板本体8和手柄9、电源控制开关10和电池11构成，手柄9与遮眼板本体8固定连接，所述电池11设在手柄9内，用以给红外线发射器2提供电源，所述电源控制开关10设在手柄9上，用以对红外线发射器2进行开关控制，所述红外线发射器设有四个，所述遮眼板本体8的周边设有呈放射状分布的四个固定柱12，固定柱12的一端与遮眼板本体8连接，四个红外线发射器2分别固定在四个固定柱12的另一端。所述固定柱的长度为8～12cm，直径为0.8～1.2mm。另外，电池11采用的是五号锂电池。
如图4所示，所述手持控制器4，用以将视标的选择结果传送给处理器5，手持控制器4的面板上设有一个居中按键以及设在居中按键周边的用以判定视标方向的上下左右的四个方向按键14，所述居中按键为开始测试按键以及无法判断视标方向的确认键13。
另外，所述硬件还包括三种不同瞳距的空白试镜框，空白试镜框，用于近视患者在配镜时使用。
如图5所示，安装在处理器中的软件，主要由身份识别模块15、视标显示模块16、视标递进模块17、动态距离测量模块18、视力换算模块19和存储模块20构成：
所述身份识别模块15，利用条码读取器6读取条码信息，并将条码信息转换为患者的身 份信息；
所述视标递进模块16，根据手持控制器的按键结果的正确个数进行递进选择，并向视标显示模块发出指令；
所述视标显示模块17，根据指令显示不同视角大小的视标，从左到右依次高亮显示被测视标，在患者做出选择或者用时超过5秒的任一情况下自动跳转到下一个视标；
所述动态距离测量模块18，根据红外线接收器感应到的四个红外线发射器的相对位置计算遮眼板与视标显示器的距离并将距离信息传递给视力换算模块；
所述视力换算模块19，根据动态距离测量模块、视标递进模块和手持控制器发出的选择结果的正确个数综合计算出视力的检测结果，并通过存储模块20保存。视力检测的标准距离为4米，受试者可以随意走近屏幕，最近不能超过1米，当完成某一行视力检查后，根据其当时的动态距离，进行换算。例如，受试者在3米处，辨认了1.0行的视力，则记录为视力为0.75。
进一步地，所述软件还包括滚动计时模块21，滚动计时模块21，用以在视标显示器7的屏幕显示区下部显示一个限时5秒的计时滚动条22，随着时间的减少颜色逐渐加深，计时滚动条滚动结束时，滚动计时模块启动视标递进模块，使视标跳转到下一个被测视标。
利用双盲设计的电子视力检测系统实现递进检测的方法如下：视标的规格与ETDRS视力表相同，共有12个级别，依次为1.6,1.2,1.0,0.9,0.8,0.7,0.6,0.5,0.4,0.3,0.2,0.1；每次在视标显示器上显示一行ETDTS视力表的视标，正在被检测的视标被显示为最高对比度，该行中的其它的视标以低对比度的方式显示；递进模式为从最大视标0.1级开始，若能识别4个以上，刚认为通过该行，然后开始跳跃式递进，从0.4级到0.7级，再到1.0级；若在其中某个等级不能识别4个或以上视标，则退回相邻的较大视标行，例如在0.7级的行不能识别4个以上视标，则退回上一级0.6级的视标行，在0.6级的视标行还不能识别，则再退回一级即0.5级，依次类推，直至能识别该行4个以上视标为止。
工作过程：开启所有软硬件系统和设备开关，在视标显示器的前方地面标记出距离屏幕1～4m的位置范围，受试者通过条码读取器识别身份并登录到检测程序，首先站在4m的位置范围内进行测试，用遮眼板遮住左眼，右手持手持控制器，按下手持控制器中央按钮启动测试，根据视标显示器上显示的视标从左到右依次在手持控制器上选出对应的“E”字开口方向，每个视标只可选择一次，不可更改，无法判断开口方向则选择 中央按键；处理器对手持控制器传输的结果进行实时分析，规定一行正确选择个数在4以上时，则认为视力达到了该行的视力标准；若受试者看清该行视标，则系统自动递进显示更小等级视角的视标进行检测，反之亦然；系统默认初始视标大小为0.1行，若0.1行判断为看得到则递进到0.4行,0.4行看不到则退回到0.3行，直至找到受试者能看到4个或以上视标的最小的视标行，综合动态距离测量结果换算出实际测量视力，若4米处视力大于等于1.0，则系统停止测试并提示受试者开始测试左眼视力；若4米处视力小于0.1，则受试者向前移动直至能看清视标，系统自动换算视力(若移动到距离屏幕X米时可以看到，则视力为0.25X),若走到一米处都看不到第一行视标，则开始测指数手动或者光感光定位；若4米处视力在0.1-1.0之间，系统提示患者向前移动任意距离(移动小于3米)重新测试，重测两次之后受试者可自主选择继续重测或者结束测试转测左眼。系统将所有测量中最好视力作为受试者真实视力值并与受试者身份信息关联保存在存储模块。以同样方法，检测左眼。检测过程中测完4米距离的视力后允许受试者在标记范围内前后移动，需同常规视力检测嘱咐受试者不可大幅度转头和眯眼。
以上所述是本发明的优选实施方式而已，当然不能以此来限定本发明之权利范围，应当指出，对于本技术领域的普通技术人员来说，对本发明的技术方案进行修改或者等同替换，都不脱离本发明技术方案的保护范围。

Claims (8)

  1. 一种双盲设计的电子视力检测系统，其特征在于：包括硬件和软件，所述硬件主要由遮眼板、红外线发射器、红外线接收器、手持控制器、处理器、条形码读取器和视标显示器构成，所述遮眼板主要由遮眼板本体和手柄、电源控制开关和电池构成，手柄与遮眼板本体固定连接，所述电池设在手柄内，用以给红外线发射器提供电源，所述电源控制开关设在手柄上，用以对红外线发射器进行开关控制，所述红外线发射器设有多个，多个红外线发射器间隔分布在遮眼板本体的周边；所述红外线接收器设在视标显示器上，红外线接收器用以适时接收红外线发射器发射的红外信号并传递给处理器，处理器通过红外信号以计算出遮眼板与视标显示器的实时距离；所述手持控制器，用以将视标的选择结果传送给处理器，手持控制器的面板上设有一个居中按键以及设在居中按键周边的用以判定视标方向的上下左右的四个方向按键，所述居中按键为开始测试按键以及无法判断视标方向的确认键；所述条形码读取器，用来扫描被测者病例上的身份信息条码，并将身份信息条码传送给处理器，处理器将所选择的“E”字视标的信息传送给视标显示器进行显示；
    安装在处理器中的软件，主要由身份识别模块、视标显示模块、视标递进模块、动态距离测量模块、视力换算模块和存储模块构成：
    所述身份识别模块，利用条码读取器读取条码信息，并将条码信息转换为患者的身份信息；
    所述视标递进模块，根据手持控制器的按键结果的正确个数进行递进选择，并向视标显示模块发出指令；
    所述视标显示模块，根据指令显示不同视角大小的视标，从左到右依次高亮显示被测视标，在患者做出选择或者用时超过5秒的任一情况下自动跳转到下一个视标；
    所述动态距离测量模块，根据红外线接收器感应到的多个红外线发射器的相对位置计算遮眼板与视标显示器的距离并将距离信息传递给视力换算模块；
    所述视力换算模块根据动态距离测量模块、视标递进模块和手持控制器发出的选择结果的正确个数综合计算出视力的检测结果，并通过存储模块保存，视力检测的标准距离为4米，受试者可以随意走近屏幕，最近不能超过1米，当完成某一行视力检查后，根据其当时的动态距离，进行换算；
    所述存储模块，能自动与患者信息关联存储。
  2. 根据权利要求1所述的双盲设计的电子视力检测系统，其特征在于：所述遮眼板本体的周边设有呈放射状分布的固定柱，固定柱的一端与遮眼板本体连接，所述红外线发射 器固定在固定柱的另一端。
  3. 根据权利要求2所述的双盲设计的电子视力检测系统，其特征在于：所述固定柱的长度为8～12cm，直径为0.8～1.2mm。
  4. 根据权利要求1至3任一项所述的双盲设计的电子视力检测系统，其特征在于：所述红外线发射器设有四个。
  5. 根据权利要求1所述的双盲设计的电子视力检测系统，其特征在于：所述手柄是由不锈钢材料制成的圆杆状结构，其直径为6～10cm，长度为18～22cm。
  6. 根据权利要求1所述的双盲设计的电子视力检测系统，其特征在于：所述红外线接收器与处理器之间采用蓝牙信息传送的方式。
  7. 根据权利要求1所述的双盲设计的电子视力检测系统，其特征在于：所述硬件还包括三种不同瞳距的空白试镜框，空白试镜框，用于近视患者在配镜时使用。
  8. 根据权利要求1所述的双盲设计的电子视力检测系统，其特征在于：所述软件还包括滚动计时模块，滚动计时模块，用以在视标显示器的屏幕显示区下部显示一个限时5秒的计时滚动条，随着时间的减少颜色逐渐加深，计时滚动条滚动结束时，滚动计时模块启动视标递进模块，使视标跳转到下一个被测视标。
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CN102499625A (zh) * 2011-11-01 2012-06-20 中国人民解放军第三军医大学 红外遥控视力自动测量装置及测试方法
CN203506687U (zh) * 2013-08-06 2014-04-02 陕西逸夫美疗科技有限公司 一种可测距离的遮眼器
CN104000553A (zh) * 2014-05-23 2014-08-27 何明光 双盲设计的电子视力检测系统

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US11944380B1 (en) 2019-09-25 2024-04-02 Welch Allyn, Inc. Systems and methods to facilitate vision screening and reporting
CN112656363A (zh) * 2020-12-17 2021-04-16 上海艾康特医疗科技有限公司 视力检测系统及视力检测方法
CN112656363B (zh) * 2020-12-17 2023-04-25 维视艾康特(广东)医疗科技股份有限公司 视力检测系统及视力检测方法
CN118078202A (zh) * 2024-04-24 2024-05-28 北京大学第三医院（北京大学第三临床医学院） 多模式动态视力检测系统

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