CN112244758A - Regulation amplitude tester and test method thereof - Google Patents
Regulation amplitude tester and test method thereof Download PDFInfo
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- CN112244758A CN112244758A CN202011042654.2A CN202011042654A CN112244758A CN 112244758 A CN112244758 A CN 112244758A CN 202011042654 A CN202011042654 A CN 202011042654A CN 112244758 A CN112244758 A CN 112244758A
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- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/09—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing accommodation
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Abstract
The invention provides an adjusting amplitude tester and a testing method thereof, and the adjusting amplitude tester comprises a central processor module, a liquid crystal touch screen display module, a distance measuring sensor module, a power supply module, a light ray detection module and a buzzer module, wherein the liquid crystal touch screen display module, the distance measuring sensor module, the power supply module, the light ray detection module and the buzzer module are in communication connection with the central processor module, and the distance measuring sensor module comprises: the range finding sensor module is including range finding transmitting element and range finding receiving element, liquid crystal touch screen display module is including the control key unit that is a body structure and the display element who is used for showing the sighting target for measure display element and measurand interval between the person range finding sensor module is fixed in on the liquid crystal touch screen display module, be used for detecting light intensity the light detection module is fixed in on the liquid crystal touch screen display module. The adjusting range tester utilizes the distance measuring sensor module to measure the distance between the sighting mark and the measured person, manual measurement is not needed, and the distance measuring accuracy is high.
Description
Technical Field
The invention relates to the technical field of visual function inspection, in particular to an adjusting amplitude tester and a testing method thereof.
Background
For the emmetropia, the eyes can see clearly whether seeing far or near. This is due to the fact that when looking at distant objects, the eye is at rest and parallel rays of light from an object at infinity form a focal point just above the retina after passing through the dioptric system of the human eye. For near distance objects, the human eye can automatically change the curvature of the crystalline lens so as to change the refractive power of the human eye, so that the near objects are still imaged on the retina, and the ability to see objects clearly is called the accommodation of the eye.
The difference in refractive power of the eye from a state in which the eye is still (i.e., relaxed accommodation) to when maximum accommodation is made is defined as the amplitude of accommodation. The adjusting amplitude can reflect the quality of the adjusting function of human eyes, and the accurate measurement of the adjusting amplitude can be an important inspection index for diagnosing and treating the changes of eyes and certain systemic diseases.
The current subjective measuring method of the adjusting amplitude mainly comprises a moving-close method and a lens method.
The approaching method comprises the following operation steps: the subject is refractive corrected and the left eye is covered under normal illumination. The near visual target is placed 0.4m in front of the eye of the person to be detected, the person to be detected is ordered to watch the visual target on the upper line of the best vision, the near visual target is moved to the person to be detected at the speed of about 2cm/s until the person to be detected reports the continuous blurring of the visual target, the person to be detected returns to the position which is still clear at last, the distance between the visual target and the plane of the glasses of the person to be detected at the moment is measured, the reciprocal of the distance (unit is m) is the adjustment amplitude of the right eye of the person to be detected, and the adjustment amplitude is 1/measurement distance (m). The same method checks the amplitude of accommodation for the left eye. When the adjustment amplitude is measured by using the approach method, the visual target is amplified and stimulated by approach adjustment due to the reduction of the distance in the approach process, so that the measurement result of the adjustment amplitude is large, the distance between the glasses and the visual target is mainly measured by using a straight ruler in the measurement process of the approach method, the measurement is inconvenient, and the measurement error is large.
In the measurement of the amplitude of regulation by means of a proximity methodIn the process of moving closer, the visual angle is increased due to the decrease of the distance, and as shown in fig. 3, when the human eye is adjusted to the maximum, the visual angle corresponding to the best vision is θ1At this time, if the size of the optotype is not changed, the angle of view is increased by θ2When the visual target becomes fuzzy on the retina, the examined person can report the fuzzy, and the adjustment amplitude is greatly calculated by the following formula due to the increase of the visual angle:
wherein FIs just: is the ametropia of the emmetropia eye.
FIs a system: the amplitude is adjusted by a large amount.
V: decimal vision numerical value
l1: the distance is designed by using the near vision chart.
l3: when the subject reports blur, the distance between the human eye and the optotype.
d: the diameter of the pupil.
The lens method operation method is as follows: the far-vision ametropia correction power of a subject is placed in the comprehensive optometry instrument, a near-vision lamp is turned on to cover the left eye, a near-vision target is placed at a position of 0.4m of a near-vision target rod, and the subject is advised to watch the last line of the vision target with the best vision. Gradually adding minus 0.25D negative sphere in front of eyes until the examinee reports continuous blurring of the optotype, and returning to plus 0.25 DD. The absolute value of the added negative spherical lens is added with +2.50D to form the right eye adjustment amplitude. The method is characterized in that a negative lens is added in front of eyes, and the visual target is reduced due to the negative lens, so that the measurement result of the adjustment amplitude is small, and the measurement precision is influenced when the measurement is carried out on a comprehensive optometry instrument, different from the actual subjective environment.
The regulation amplitude is closely related to the occurrence and development of presbyopia and myopia, and the evaluation of the regulation amplitude is a key factor for exploring pathogenesis and treatment effect of presbyopia and myopia, so that an accurate and good-repeatability measurement method and evaluation standard are urgently sought clinically.
Disclosure of Invention
The invention mainly aims at the defects of the current subjective measurement adjusting amplitude measuring method and provides a tester for accurately measuring the adjusting amplitude.
The invention also aims to provide a measuring method of the tester, which has the advantages of convenient measurement, high measurement precision, good measurement repeatability and good reliability.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the utility model provides an amplitude regulation tester, including central processing unit module and with liquid crystal touch screen display module, range finding sensor module, power module, light detection module and buzzer module that central processing unit module communication is connected, wherein:
the range finding sensor module is including range finding transmitting element and range finding receiving element, liquid crystal touch screen display module is including the control key unit that is a body structure and the display element who is used for showing the sighting target for measure display element and measurand interval between the person range finding sensor module is fixed in on the liquid crystal touch screen display module, be used for detecting light intensity the light detection module is fixed in on the liquid crystal touch screen display module.
In the above technical solution, the distance measuring sensor module is embedded in the liquid crystal touch screen display module or fixed outside the liquid crystal touch screen display module.
In the above technical solution, the distance measuring sensor module is an ultrasonic distance measuring module, and more preferably, the model is TELESKY US-100.
In the above technical solution, the distance measuring sensor module is an infrared distance measuring sensor module, and more preferably, the model is GP2Y0a41SK 0F.
In the above technical solution, the light detecting module is an XH-M131 module.
In the technical scheme, the liquid crystal touch display screen module is 8 inches in size of SDWe080YY05C capacitive touch.
In the above technical solution, the central processing unit module is a seeuino xiao central processing unit module.
In the technical scheme, the buzzer module is KY-006.
In the above technical solution, the power module is a TP4056 power module.
In another aspect of the present invention, the testing method of the modulation amplitude tester includes the following steps:
the adjustment amplitude is 1/measurement distance d.
The formula of the side length C of the sighting target and the change along with the measured distance d is as follows:
C＝5*d×1/V×ρ
wherein rho is 2 pi/(360 x 60), V is decimal number to record vision, and rho is 1 minute radian value;
the movement was stopped when the patient reported that the visual target direction could be seen and the accommodative amplitude of the right eye was recorded.
And 3, repeating the step 1 and the step 2, and measuring the adjusting amplitude of the left eye and/or the two eyes.
In the above technical solution, when the size of the visual target changes in the step 2, the central point of the visual target is used as the center position to be enlarged or reduced.
Compared with the prior art, the invention has the beneficial effects that:
1. the adjusting range tester measures the distance between the sighting target and the measured person by using the distance measuring sensor module, does not need manual measurement, has high distance measuring accuracy, and in addition, the adjusting range is directly displayed on the liquid crystal touch screen display module without manual calculation, so the whole measuring process is time-saving and labor-saving.
2. The visual target becomes smaller or larger by taking the center as a central point in the measuring process, so that the error caused by the change of the visual angle in the front-back moving process of the visual target is avoided, and the measuring accuracy is greatly reduced.
Drawings
FIG. 1 is a block diagram of a modulation amplitude tester.
Fig. 2 is a schematic diagram of the structure of the modulation amplitude tester.
FIG. 3 is a diagram illustrating measurement errors in a prior art proximity method.
In the figure: the system comprises a distance measuring sensor module, a light ray detection module, a display unit, a visual target and a control key unit, wherein the distance measuring sensor module is 1, the light ray detection module is 2, the display unit is 3, and the control key unit is 5.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-2, an amplitude modulation tester comprises a central processing unit module, and a liquid crystal touch screen display module, a distance measuring sensor module 1, a power supply module, a light detection module 2 and a buzzer module which are in communication connection with the central processing unit module, wherein
The range finding sensor module includes range finding transmitting element and range finding receiving element, liquid crystal touch screen display module is including the control key unit 5 that is a body structure and the display element 3 that is used for showing sighting target 4 for measure display element and be measured interval between the person range finding sensor module is fixed in on the liquid crystal touch screen display module, be used for detecting light intensity the light detection module is fixed in on the liquid crystal touch screen display module.
During measurement, the display unit displays the sighting mark, the distance between the display unit and the measured person is measured by the distance measuring sensor module, the measuring distance is transmitted to the central processing unit module, and the central processing unit module is according to a formula: the adjustment amplitude is 1/measurement distance (m), the distance value is directly converted into the adjustment amplitude, and the liquid crystal touch screen display module displays the adjustment amplitude. The size of the visual target on the liquid crystal touch screen display module changes according to the measured distance, wherein the control key unit 5 is used for switching the display mode of the visual target, the whole standard logarithmic near vision chart or one visual target in the visual chart is displayed on the display unit 3, and the control key unit 5 can be used for switching between the two display modes.
The light intensity of the sighting mark position is detected to the light detection module, and when measuring light exceeded the range of adjustment range measurement (light detection module detects that the illumination value is 90 ~ 300 Lx), the buzzer module can send out the warning prompt tone.
Preferably, the ranging sensor module is embedded in the liquid crystal touch screen display module or fixed outside the liquid crystal touch screen display module. The measuring range of the distance measuring sensor module is 0-100 cm, and the measuring precision is more than 1 mm. The distance measuring sensor module measures the distance between the liquid crystal touch screen display module and human eyes, the accuracy is high, the measurement repeatability is improved, and the measurement result can be automatically displayed.
Example 2
In this embodiment, the model of each module is exemplified on the basis of embodiment 1.
Preferably, the distance measuring sensor module is an ultrasonic distance measuring module, and more preferably, the model is TELESKY US-100.
Preferably, the distance measuring sensor module is an infrared distance measuring sensor module, and more preferably, the model number is GP2Y0a41SK 0F.
Preferably, the light detection module is an XH-M131 module.
Preferably, the liquid crystal touch display screen module is 8 inches in capacitance touch of SDWe080YY 05C.
Preferably, the central processor module is a seeuino xiao central processor module.
Preferably, the buzzer module is KY-006.
Preferably, the power module is a TP4056 power module.
Example 3
The method for testing a modulation amplitude tester as described in embodiment 1 or embodiment 2, comprising the steps of:
the adjustment amplitude is 1/measurement distance (d, in m).
The side length (C) of the sighting mark and the change formula along with the measuring distance (d) are as follows:
c (optometric side length) ═ 5 × d (measured distance) × 1/V (decimal recorded vision) × ρ (1 minute radian value)
Wherein rho is 2 pi/(360 x 60)
The movement was stopped when the patient reported that the visual target direction could be seen and the accommodative amplitude of the right eye was recorded.
And 3, repeating the step 1 and the step 2, and measuring the adjusting amplitude of the left eye and/or the two eyes.
Furthermore, when the size of the visual target changes in the step 2, the position of the central point of the visual target is used as the center position to be enlarged or reduced.
In addition, the accommodation amplitude tester of embodiments 1 and 2 can be used to acquire accommodation requirements and test binocular accommodation amplitudes to determine presbyopic appendage vertex power. The method can also be used for testing the near point of the human eye set, and the measurement precision is improved.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an amplitude regulation tester, its characterized in that, including central processing unit module and with liquid crystal touch screen display module, range finding sensor module, power module, light detection module and buzzer module that central processing unit module communication is connected, wherein:
the range finding sensor module is including range finding transmitting element and range finding receiving element, liquid crystal touch screen display module is including the control key unit that is a body structure and the display element who is used for showing the sighting target for measure display element and measurand interval between the person range finding sensor module is fixed in on the liquid crystal touch screen display module, be used for detecting light intensity the light detection module is fixed in on the liquid crystal touch screen display module.
2. The tuned amplitude tester of claim 1, wherein the ranging sensor module is embedded within the lcd touch screen display module or fixed outside the lcd touch screen display module.
3. The tuning range tester of claim 1, wherein the ranging sensor module is an ultrasonic ranging module or the ranging sensor module is an infrared ranging sensor module.
4. The tuning amplitude tester of claim 1, wherein the light detection module is an XH-M131 module.
5. The tuning amplitude tester of claim 1, wherein the lcd touch screen module is SDWe080YY 05C.
6. The modulation amplitude tester of claim 1, wherein the central processor module is a seeuino xiao central processor module.
7. The tuned amplitude tester as claimed in claim 1, wherein the buzzer module is KY-006.
8. The regulated amplitude tester of claim 1, wherein the power module is a TP4056 power module.
9. The method for testing the modulation amplitude tester of any one of claims 1-8, comprising the steps of:
step 1, a person to be detected wears glasses for completely correcting ametropia, covers a left eye, measures the adjustment amplitude of the right eye, holds the adjustment amplitude tester at a position of 0-5cm of the right eye by hand, adjusts the brightness of the display unit to reach 150-plus 250/Lx, simultaneously detects an environmental illumination value by a light detection module, and when the brightness exceeds 82-300/Lx, the central processor module transmits the brightness to a buzzer module to send out a warning, and the display unit displays the whole standard logarithmic near vision chart;
step 2, selecting the last line of visual targets with the best vision of the person to be detected by using the control key unit, displaying one visual target of the line of visual targets on the display unit, placing the visual target in front of the eye and in parallel with the human eye by using the handheld adjusting range tester, slowly keeping away from the person to be detected at the speed of 1-2 cm/s, dynamically changing the size of the visual target on the display unit according to the following formula according to the change of the measuring distance, and displaying the adjusting range on the display unit;
adjusting amplitude to be 1/measuring distance d;
the formula of the side length C of the sighting target and the change along with the measured distance d is as follows:
C＝5*d×1/V×ρ
wherein rho is 2 pi/(360 x 60), V is decimal number to record vision, and rho is 1 minute radian value;
stopping moving when the patient reports that the direction of the sighting mark can be seen clearly, and recording the adjusting amplitude of the right eye;
and 3, repeating the step 1 and the step 2, and measuring the adjusting amplitude of the left eye and/or the two eyes.
10. The measurement method according to claim 9, wherein the size of the visual target in step 2 is changed to be increased or decreased with the center point of the visual target as the center.
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| CN202011042654.2A CN112244758A (en) | 2020-09-28 | 2020-09-28 | Regulation amplitude tester and test method thereof |
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| CN202011042654.2A CN112244758A (en) | 2020-09-28 | 2020-09-28 | Regulation amplitude tester and test method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115868917A (en) * | 2023-02-23 | 2023-03-31 | 广州视景医疗软件有限公司 | Method and device for detecting adjustment amplitude |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115868917A (en) * | 2023-02-23 | 2023-03-31 | 广州视景医疗软件有限公司 | Method and device for detecting adjustment amplitude |
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