CN217548011U - Vision detection system matched with pupil center of examinee - Google Patents
Vision detection system matched with pupil center of examinee Download PDFInfo
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- CN217548011U CN217548011U CN202220501791.6U CN202220501791U CN217548011U CN 217548011 U CN217548011 U CN 217548011U CN 202220501791 U CN202220501791 U CN 202220501791U CN 217548011 U CN217548011 U CN 217548011U
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Abstract
The utility model discloses a vision detection system matched with the pupil center of a subject, which comprises a vision detection main body and a glasses accessory, wherein the glasses accessory comprises a glasses frame and two light-proof lenses arranged on the glasses frame, and the center of each light-proof lens is provided with an active light-emitting diode; the vision detection main body comprises an LCD display screen and a first single chip microcomputer system connected with the LCD display screen, and the first single chip microcomputer system is connected with a pupil center matching module arranged on the LCD display screen; the first single chip microcomputer system measures the distance and the relative position between the diode and the vision detection main body by using the pupil center point matching module, and regulates and controls the LCD display screen to randomly display detected icons with different opening directions at the corresponding positions; the embodiment matches the detected icons with different heights and corresponding pupil positions, thereby reducing the measurement error caused by the height difference between the pupil center position and the detected icon.
Description
Technical Field
The utility model relates to a visual acuity detection technical field, concretely relates to visual acuity detection system who matches person of being examined pupil central point.
Background
The principle of clinical vision detection is that the minimum distance corresponding to an included angle formed by the light rays emitted by two external points in the foveal vision acuity of the macular region of the human eye through an intraocular node (namely, the corresponding angle formed when the two points of an external object are shot into the eye to intersect) is the minimum distance which can be distinguished by a detected person and corresponds to the optimal vision of the detected person. The numerical value of the method is closely related to the symmetry, the detection distance and the environmental background light intensity of the detected icon and the central position of the macular area of the retina of the detected person. The existing visual detection basically evaluates the visual function of a detected person by fixing a fixed visual detection plate with specific background light intensity on a wall surface.
Therefore, the existing vision detection mode has the following defects:
(1) When people with different heights are tested, errors can occur due to the fact that the height difference between the central position of the macular area of the retina of the detected person and the detected icon changes, and the left deviation and the right deviation between the central position of the macular area of the retina of the detected icon and the central position of the macular area of the retina of the detected person can also occur due to the fact that the left eye and the right eye of the same detected person are tested;
(2) The fixed detection mode can be recited to mislead the wrong result, thereby making the detection result inaccurate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a visual acuity detection system who matches person of being examined pupil central point to solve person of being examined retina macula district central point among the prior art and change and the error appears with the difference in height that is examined the icon, and the fixed can recite of detection mode and mislead wrong result, and then make the unsafe technical problem of testing result.
In order to solve the above technical problem, the utility model particularly provides the following technical scheme:
a vision detection system matched with the pupil center of a subject comprises a vision detection main body and a glasses accessory, wherein the vision detection main body and the glasses accessory are connected through wireless communication,
the glasses accessory comprises a glasses frame and two light-tight lenses arranged on the glasses frame, wherein an active light-emitting diode is arranged at the center of each light-tight lens, and the diode on each light-tight lens works independently;
the vision detection main body comprises an LCD display screen and a first single chip microcomputer system connected with the LCD display screen, and the first single chip microcomputer system is connected with a pupil center point matching module arranged on the LCD display screen;
the first single chip microcomputer system measures the distance and the relative position between the diode and the vision detection main body by utilizing the pupil center point matching module, and regulates and controls the LCD display screen to randomly display detected icons with different opening directions at corresponding positions.
As a preferred scheme of the embodiment, the upper side of the opaque lens is movably mounted on the glasses frame, and the diode is connected with a second single chip microcomputer system, and the second single chip microcomputer system is used for regulating and controlling the light emitted by the diode.
As a preferred scheme of this embodiment, the pupil center matching module is configured to receive light emitted by the diodes, the pupil center matching module includes a plurality of first photosensors installed at geometric center positions of the LCD display screen, back surfaces of the first photosensors are isolated from the LCD display screen by light, front surfaces of the first photosensors face the diodes, the first single chip microcomputer system determines positions of the two diodes according to light intensity changes received by the first photosensors, and the first single chip microcomputer controls the LCD display screen to display detected icons with different sizes and different opening directions at positions where the two diodes are matched.
As a preferable scheme of the embodiment, the second single chip microcomputer system collects a sending time point of light emitted by the diode, the first single chip microcomputer system collects a receiving time point of light detected by the first photosensor, and the first single chip microcomputer system determines a distance between the diode and the LCD display screen based on the sending time point and the receiving time point.
Compared with the prior art, the utility model following beneficial effect has:
the utility model discloses when the person of being examined tests eyesight, match not co-altitude and correspond the examined icon of pupil position to reduce the measuring error that the difference in height that the person of being examined retina macular district central point put and examined the icon arouses, and the eye is controlled about the same person of being examined and is matchd the examined icon in different regions when testing eyesight, consequently examined icon and person of being examined retina macular district central point put and just in time realize the position matching, thereby the error that the eyesight detected has been reduced, realize convenient, swift, accurate detection eyesight.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
Fig. 1 is a block diagram of a vision inspection system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of an eyeglass accessory according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an embodiment of the vision detecting system.
In the figure:
1-a vision test subject; 2-eyeglass accessories;
11-LCD display screen; 12-a first one-chip microcomputer system; 13-pupil center matching module;
131-a first light sensitive sensor;
21-spectacle frame; 22-opaque lens; 23-a diode; 24-second singlechip system
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a visual detection system who matches examinee's pupil central point, including visual detection main part 1 and glasses annex 2, visual detection main part 1 and glasses annex 2 pass through wireless communication and connect, and wherein, glasses annex 2 includes spectacle-frame 21 to and two light tight lenses 22 of setting on spectacle-frame 21, the central point of every light tight lens 22 puts and installs the diode 23 of initiative luminescence, and the diode 23 independent work on every light tight lens 22.
The vision detection main body 1 comprises an LCD display screen 11 and a first single chip microcomputer system 12 connected with the LCD display screen 11, and the first single chip microcomputer system 12 is connected with a pupil center point matching module 13 installed on the LCD display screen 11.
The first single chip microcomputer system 12 measures the distance and the relative position between the diode 23 and the vision detection main body 1 by using the pupil center point matching module 13, and the first single chip microcomputer system 12 regulates and controls the LCD display screen 11 to randomly display the detected icon at the corresponding position.
The characteristic points of the present embodiment that are different from the prior art are:
in the embodiment, a light-emitting diode is worn firstly, and the vision detecting main body 1 identifies the diode by using the pupil center point matching module 13 to determine the up-down position and the left-right position of the pupil of the human eye relative to the position between the LCD display screen 11, so that the LCD display screen 11 displays detected icons in different opening directions at the matched height position, namely a common letter E, and thus when a detected person tests the vision, the detected icons in different heights and corresponding pupil positions are matched, thereby reducing the measurement error caused by the height difference between the central position of the macular area of the retina of the detected person and the detected icon.
And the same person to be examined matches the examined icon in different areas when testing vision with the left and right eyes, therefore the examined icon just realizes position matching with the central position of the macular area of the person to be examined, thereby reducing the error of vision testing and realizing convenient, rapid and accurate vision testing, namely, when the left and right eyes respectively carry out vision testing, the LCD display screen 11 is adapted to the left and right positions of each eye, and the examined icons in different opening directions are displayed at different positions, thus the problem of inaccurate vision testing caused by the distance difference between the examined icon and the central position of the macular area of the person to be examined can be reduced to the maximum extent.
As shown in fig. 2, the upper side of the opaque lens 22 of the eyeglass accessory 2 is movably mounted on the eyeglass frame 21, the diode 23 is connected to the second single chip microcomputer system 24, and the second single chip microcomputer system 24 is used for regulating and controlling the light emitted by the diode 23.
The diode and the corresponding simple circuit are embedded and fixed on the opaque lens, the diode is installed on the central point of the opaque lens and generally corresponds to the central position of the pupil of a wearer, and the influence of the slight difference between the diode and the pupil on the detection result can be ignored.
Pupil center matching module 13 is used for receiving the light that diode 23 sent, pupil center matching module 13 includes a plurality of first photosensitive sensor 131 of installing on LCD display screen 11, the back and the LCD display screen 11 of first photosensitive sensor 131 carry out light isolation, and the front of first photosensitive sensor 131 is towards diode 23, first single chip microcomputer system 12 confirms the position of two diodes 23 according to the light intensity change that first photosensitive sensor 131 received, and first single chip microcomputer regulation and control LCD display screen 11 is in the different examined icons of the different just opening direction of the position display size that matches two diodes 23.
The second single chip microcomputer system 24 collects the sending time point of the light emitted by the diode 23, the first single chip microcomputer system 12 collects the receiving time point of the light detected by the first photosensitive sensor 131, and the first single chip microcomputer system 12 determines the distance between the diode 23 and the LCD display screen 11 based on the sending time point and the receiving time point.
In the force application detection system of the present embodiment, it is necessary to ensure that the distance of each vision test is not changed, so the present embodiment can ensure the same influence factor of each vision measurement by calculating the distance between the diode 23 and the LCD display screen 11, thereby improving the accuracy when determining the vision change.
Generally speaking, a person wears the glasses accessory 2 and sits on a chair, and the chair normally corresponds to the central axis of the LCD display screen 11, because of the difference in height of the person, and after wearing the glasses accessory 2, the diode 23 corresponds to the different height positions of the LCD display screen 11, and because of the difference in body size of the person, the left and right positions of the diode 23 can also be changed within a certain range.
Therefore, in the present embodiment, after the first photosensor 131 detects the position of the diode 23, the icon to be detected with a random opening direction can be displayed within a certain range of the first photosensor 131, and in this case, the pupil center point of the human eye and the icon to be detected are almost on the same horizontal line, that is, the icon to be detected (opening E) is displayed only at the center point corresponding to the pupil center point of the detected person, so that the measurement error caused by the height difference between the center position of the macular area of the retina of the detected person and the icon to be detected is reduced.
Therefore, in summary, the specific implementation process of performing eyesight detection in this embodiment is as follows:
firstly, an opening E with the corresponding size of eyesight is given according to historical eyesight detection data of a detected person, but the direction of the opening E is randomly presented, so that the phenomenon that the detected person improves the eyesight detection data by memorizing the direction of the opening E with the corresponding fixed position is avoided.
Then, when the detected person can correctly give the direction of the randomly appearing opening E, the data of the opening E corresponding to the higher vision randomly appears at the central point, and the previous detection process is repeated until the detected person cannot correctly give the direction of the opening E.
Otherwise, when the detected person can not read the opening E with the corresponding size of the vision line number in the historical data, calling the opening E data corresponding to the lower vision, repeating the previous detection process until the detected person can correctly give the opening E direction, and accordingly giving the vision data detected this time and recording the vision data in the system.
In a common eye chart, each line of vision data generally has an odd number of openings E in different directions, so the embodiment only needs to have four openings E in different directions at positions matched with pupils for an odd number of times, and the effect same as that of the existing vision detection system can be achieved. The display of all the openings E of the embodiment is displayed at the center point corresponding to the pupil center point of the detected person, so that the practical problem that the traditional vision detection system points to the opening E at the outermost edge when being operated by a vision operation doctor, which causes the influence on the vision development (especially astigmatism or amblyopia) on the detection result of teenagers is avoided to the greatest extent.
The schematic diagram and principle of vision test shown in fig. 3 can be known: the original vision detection system is based on the best position of a C0 point in a C line which is just opposite to the pupil of a detector; when a detected person detects the uppermost line in the visual chart, an included angle between an opening E in the visual chart and the pupil of the detected person on a sagittal plane is too large, so that an error is caused; similarly, even the right C row has an error angle in the transverse plane when detecting the openings E at the leftmost and rightmost ends thereof.
In the embodiment, all the openings E display 4 openings E at the best detection point C0 randomly and odd times, and all the data are displayed and detected at the best detection point in the whole detection process, so that the best vision condition of the person to be detected can be detected.
The eyeglass attachment 2 in the present embodiment is made by modifying conventional eyeglasses, and the steps of performing vision detection on the left and right eyes in the present embodiment are as follows:
when a person to be examined wears the glasses accessory 2 and carries out left eye vision examination, the diode 23 at the central position of the left opaque lens 22 emits red light, the red light is received by the first photosensitive sensor 131 on the vision examination main body 1, after the height, the position and the distance information between the left pupil central position of the person to be examined are obtained through analysis and processing by the first single chip microcomputer system 12 in the vision examination main body 1, E in different opening directions is randomly displayed at one time at the position where the LCD display screen 11 is superposed with the left pupil, and meanwhile, the left opaque lens 22 is turned upwards to start to examine the vision of the left eye of the person to be examined.
When the vision detection of the right eye is carried out, the central position of the pupil at the right side of the subject is determined by repeating the similar actions at the left side, and the opaque lens 22 at the left side returns to the original position while the opaque lens 22 at the right side is turned up. The testee randomly displays E with different opening directions at one time according to the appearance of the corresponding position, and presses a button corresponding to the opening direction to finish all detection.
Therefore, the test of the left eye and the right eye of the same detected person is matched with the detected icons in different areas, the detected icons are just matched with the central position of the macular area of the retina of the detected person in position, the error of vision detection is reduced, and the central position of the macular area of the retina of the detected person is ensured to be matched with the detected icons in height and position, so that the embodiment can conveniently, quickly and accurately detect the vision.
In addition, the LCD display 11 of the present embodiment may further include a backlight measurement and a feedback light supplement, which are used to measure the illuminance of the backlight in real time, compare the measured illuminance with the standard illuminance of the single chip, and perform a targeted light supplement, so that the illuminance displayed on the LCD display reaches the standard illuminance.
The first single chip microcomputer system 12 further comprises an information storage module and an information analysis module, wherein the information storage module is used for storing and identifying personal basic information of each person to be detected and a vision detection result of the person to be detected; the information analysis module is used for comparing all vision detection results of the detected person and analyzing and predicting the vision change trend of the detected person, so that the detected person can be helped to manage own vision more efficiently and reasonably.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (4)
1. A vision detection system matched with the pupil center of a person to be detected is characterized by comprising a vision detection main body (1) and a glasses accessory (2), wherein the vision detection main body (1) and the glasses accessory (2) are connected through wireless communication,
the glasses accessory (2) comprises a glasses frame (21) and two non-light-transmitting lenses (22) arranged on the glasses frame (21), wherein an active light-emitting diode (23) is arranged at the center of each non-light-transmitting lens (22), and the diodes (23) on each non-light-transmitting lens (22) work independently;
the vision detection main body (1) comprises an LCD display screen (11) and a first single chip microcomputer system (12) connected with the LCD display screen (11), wherein the first single chip microcomputer system (12) is connected with a pupil center point matching module (13) installed on the LCD display screen (11);
the first single chip microcomputer system (12) measures the distance and the relative position between the diode (23) and the vision detection main body (1) by utilizing the pupil center point matching module (13), and the first single chip microcomputer system (12) regulates and controls the LCD display screen (11) to randomly display detected icons with different opening directions at corresponding positions.
2. A vision testing system according to claim 1, wherein said system comprises: the upper side of the light-tight lens (22) is movably mounted on the glasses frame (21), the diode (23) is connected with a second single chip microcomputer system (24), and the second single chip microcomputer system (24) is used for regulating and controlling the light emitted by the diode (23).
3. A vision testing system matching the pupil center of a subject as claimed in claim 2, wherein: the pupil center point matching module (13) is used for receiving light rays emitted by the diode (23), the pupil center point matching module (13) comprises a plurality of first photosensitive sensors (131) installed at the geometric center position of the LCD display screen (11), the back sides of the first photosensitive sensors (131) are in light isolation with the LCD display screen (11), the front sides of the first photosensitive sensors (131) face the diode (23), the first single chip microcomputer system (12) determines the positions of the two diodes (23) according to light intensity changes received by the first photosensitive sensors (131), and the first single chip microcomputer regulates and controls the LCD display screen (11) to display detected icons with different sizes and different opening directions at the positions where the two diodes (23) are matched.
4. A vision testing system according to claim 3, wherein said system comprises: the second single chip microcomputer system (24) collects the sending time point of light emitted by the diode (23), the first single chip microcomputer system (12) collects the receiving time point of light detected by the first photosensitive sensor (131), and the first single chip microcomputer system (12) determines the distance between the diode (23) and the LCD display screen (11) based on the sending time point and the receiving time point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220501791.6U CN217548011U (en) | 2022-03-08 | 2022-03-08 | Vision detection system matched with pupil center of examinee |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220501791.6U CN217548011U (en) | 2022-03-08 | 2022-03-08 | Vision detection system matched with pupil center of examinee |
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| CN217548011U true CN217548011U (en) | 2022-10-11 |
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| CN202220501791.6U Active CN217548011U (en) | 2022-03-08 | 2022-03-08 | Vision detection system matched with pupil center of examinee |
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