CN219021141U - Novel interactive visual acuity chart - Google Patents
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- CN219021141U CN219021141U CN202223061550.3U CN202223061550U CN219021141U CN 219021141 U CN219021141 U CN 219021141U CN 202223061550 U CN202223061550 U CN 202223061550U CN 219021141 U CN219021141 U CN 219021141U
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Abstract
The utility model discloses a novel interactive visual acuity chart, which comprises a visual acuity chart shell, a putting screen, a visual acuity chart system, a control handle, a detection result printer and a main control board, wherein the putting screen is fixedly arranged on the visual acuity chart shell; the sighting target system comprises a first sighting target area and a second sighting target area, wherein the first sighting target area and the second sighting target area are in a left-right arrangement structure. The interactive visual acuity chart can automatically put in the detection visual acuity chart, adopts a structure of arranging the visual acuity chart left and right, completely solves the problem of equal height of the visual acuity center of a user and the visual acuity chart row, can automatically indicate the visual acuity chart and judge whether the visual acuity chart is correct or not, finally outputs the detection result, and has the advantages of simple structure, convenient operation and high detection efficiency.
Description
Technical Field
The utility model belongs to the field of vision testing tools, and particularly relates to a novel interactive vision chart.
Background
Vision (Vision), i.e., visual Acuity, is an important inspection indicator for evaluating the Visual function of the human eye, i.e., the Visual Acuity of the fovea aspect of the retina, and refers to the ability of the human eye to resolve the minimum distance between two object points of the outside world. Vision can be divided into far vision and near vision.
The angle formed by the two end points of the external object at the eye junction is called the visual angle. The macula retinae had sensory imaging pyramidal cells, each of which had a diameter of about 0.004mm. The eye must stimulate two different pyramidal cells to excite at two points where the distance between the external object to be resolved is the smallest, and the two excited pyramidal cells must be separated by one non-stimulated pyramidal cell.
The visual acuity chart is a chart for measuring eyesight, and the common visual acuity chart comprises: the international standard visual acuity chart, logarithmic visual acuity chart and the lan' ring visual acuity chart are functionally classified into: near vision chart, far vision chart. The vision inspection is generally divided into far vision and near vision, the far vision adopts an international standard visual chart, the chart is composed of 14 rows of E-shaped characters with different opening directions, the measurement is from 0.1 to 1.5 (or from 4.0 to 5.2), the vision of the person to be inspected is parallel to one row of 1.0, and the distance is 5 meters from the visual chart.
The visual chart is designed according to the principle of visual angle, namely the visual angle is the included angle formed by the light rays emitted by two points outside through the intraocular nodes (namely the allied angle formed when two points of an external object are injected into eyes to intersect). Normally, the human eye can distinguish that the minimum distance between two points forms the minimum viewing angle, i.e. a split viewing angle. The visual acuity test chart is designed to effectively detect the visual acuity by taking a viewing angle as a unit.
The traditional national standard visual acuity chart cannot automatically put in the detection visual acuity chart, E-shaped visual acuity charts from 0.05 to 2.0 are arranged in the vertical direction and are arranged at the height of 1.2 meters, a person to be detected looks down or looks up, only 0.25-0.8 section of visual acuity chart is equal to the human eyes in height, and thus, the visual acuity chart for detecting the visual acuity of less than 0.25 and more than 0.8 is relatively inaccurate. The traditional national standard visual chart can only manually indicate the visual target, then the visual target is judged correctly and incorrectly by manpower, and finally the visual detection result is judged, so that the process is long, the labor intensity is high, the judgment is subjective and inaccurate, the detection result can only be filled by detection personnel, the efficiency is low, the labor consumption cost is high, and the detection result cannot be automatically printed.
Therefore, a novel interactive visual acuity chart is needed, a detection visual acuity chart can be automatically put in, the height of a visual acuity chart line is equal to the height of a human eye, the visual acuity chart can be automatically indicated and judged to be correct or incorrect, and finally a detection result is output.
Disclosure of Invention
In order to solve the problems that the existing national standard visual acuity chart cannot automatically put the detection visual acuity chart, only 0.25-0.8 section of visual acuity chart is as high as human eyes, only the visual acuity chart can be indicated manually, then the accuracy and the false are judged manually, and finally the visual acuity detection result is judged, the labor intensity is high and the efficiency is low, the utility model aims to provide a novel interactive visual acuity chart, the detection visual acuity chart can be automatically put, the height of a visual acuity chart row is as high as the human eyes, the visual acuity chart can be automatically indicated, the accuracy and the false are judged, and finally the detection result is output.
The utility model provides a novel interactive visual acuity chart, which comprises a visual acuity chart shell, a putting screen, a visual acuity chart system, a control handle, a detection result printer and a main control board, wherein the putting screen is fixedly arranged on the visual acuity chart shell, the visual acuity chart system is arranged in the visual acuity chart shell and is connected with the main control board, the control handle is in communication connection with the visual acuity chart system, the detection result printer is fixedly arranged at the lower part of the visual acuity chart shell and is connected with the main control board, and the main control board is fixedly arranged in the visual acuity chart shell.
The sighting target system comprises a first sighting target area and a second sighting target area, wherein the first sighting target area and the second sighting target area are in a left-right arrangement structure.
Further, the visual acuity chart shell is a three-dimensional round corner rectangular shell, and the visual acuity chart shell can be made of plastics, metals or alloys.
Further, an upper protection plate is arranged at the upper edge of the visual acuity chart shell, and a lower protection plate is arranged at the lower edge of the visual acuity chart shell.
Further, the back of the visual acuity chart casing is provided with a mounting frame, and the mounting frame is provided with at least 1 mounting and fixing hole.
Further, the interactive visual acuity chart also comprises 1 wall hanging structure, wherein the wall hanging structure is provided with at least 1 fixing through hole.
Furthermore, the fixing through hole of the wall hanging structure can correspond to the mounting fixing hole on the mounting rack and is fixedly connected with the mounting fixing hole.
Further, put in the screen and include glass board and banks case, put in the fixed front portion that sets up of glass board of screen in visual acuity chart casing, put in the fixed back that sets up of banks case of screen in putting in glass board to set up in the inside of visual acuity chart casing.
Furthermore, the lamp set box is internally provided with an illuminating lamp, and the light emitted by the illuminating lamp can illuminate a plurality of sighting marks on the glass plate.
Further, the first optotype region includes a first optotype row, a second optotype row, a third optotype row, and a fourth optotype row.
Further, the second optotype region includes a fifth optotype row, a sixth optotype row, a seventh optotype row, an eighth optotype row, a ninth optotype row, a tenth optotype row, an eleventh optotype row, a twelfth optotype row, a thirteenth optotype row, and a fourteenth optotype row.
Further, the first optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation.
Further, the first optotype row includes 2 optotypes, and the 2 optotypes of the first optotype row are all E-shaped optotypes.
Further, the second optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation.
Further, the second optotype row includes 2 optotypes, and the 2 optotypes of the second optotype row are all E-shaped optotypes.
Still further, the third optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the third optotype row includes 2 optotypes, and the 2 optotypes of the third optotype row are all E-shaped optotypes.
Further, the fourth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the fourth optotype row includes 3 optotypes, and all of the 3 optotypes in the fourth optotype row are E-shaped optotypes.
Further, the fifth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation.
Further, the fifth optotype row includes 3 optotypes, and the 3 optotypes of the fifth optotype row are all E-shaped optotypes.
Further, the sixth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the sixth optotype row includes 4 optotypes, and the 4 optotypes of the sixth optotype row are all E-shaped optotypes.
Further, the seventh optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the seventh optotype row includes 4 optotypes, and the 4 optotypes of the seventh optotype row are all E-shaped optotypes.
Still further, the eighth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the eighth optotype row includes 5 optotypes, and the 5 optotypes of the eighth optotype row are all E-shaped optotypes.
Still further, the ninth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the ninth optotype row includes 6 optotypes, and the 6 optotypes of the ninth optotype row are all E-shaped optotypes.
Still further, the tenth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the tenth optotype row includes 7 optotypes, and the 7 optotypes of the tenth optotype row are all E-shaped optotypes.
Further, the eleventh optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the eleventh optotype row includes 8 optotypes, and the 8 optotypes of the eleventh optotype row are all E-shaped optotypes.
Still further, the twelfth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the twelfth optotype row includes 8 optotypes, and the 8 optotypes of the twelfth optotype row are all E-shaped optotypes.
Still further, the thirteenth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the thirteenth optotype row includes 8 optotypes, and the 8 optotypes of the thirteenth optotype row are all E-shaped optotypes.
Still further, the fourteenth optotype row includes at least 1 optotype, and an EVA structure is provided between two adjacent optotypes for separation.
Further, the fourteenth optotype row includes 8 optotypes, and the 8 optotypes of the fourteenth optotype row are all E-shaped optotypes.
Further, the control handle is provided with a signal sending module, and the control handle can send control signals to the main control board through the signal sending module.
Further, the detection result printer is fixedly arranged at the lower part of the shell of the putting screen and is connected with the main control board.
Further, the detection result printer is an embedded thermal printer.
The interactive visual acuity chart has the beneficial effects that:
the interactive visual acuity chart can automatically put in the detection visual acuity chart, adopts a structure of arranging the visual acuity chart left and right, completely solves the problem of equal height of the visual acuity center of a user and the visual acuity chart row, can automatically indicate the visual acuity chart and judge whether the visual acuity chart is correct or not, finally outputs the detection result, and has the advantages of simple structure, convenient operation and high detection efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an interactive visual chart of the present utility model;
FIG. 2 is a front view of an interactive visual chart of the present utility model;
FIG. 3 is a rear view of the interactive visual chart of the present utility model;
FIG. 4 is a left side view of the interactive visual chart of the present utility model;
FIG. 5 is a right side view of the interactive visual chart of the present utility model;
FIG. 6 is a top view of an interactive visual chart of the present utility model;
fig. 7 is a bottom view of the interactive visual chart of the present utility model.
Reference numerals illustrate:
100 interactive visual acuity chart;
200 visual acuity chart casing;
210 a protective plate;
220 a lower protective plate;
230 mounting frame;
300 drop screen;
400 optotype system;
410 a first optotype region;
420 a second optotype region;
500 detection result printer;
600 wall hanging structure.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "coupled," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Fig. 1 is a schematic view of the overall structure of the novel interactive visual acuity chart of the present utility model, fig. 2 is a front view of the novel interactive visual acuity chart of the present utility model, fig. 3 is a rear view of the novel interactive visual acuity chart of the present utility model, fig. 4 is a left view of the novel interactive visual acuity chart of the present utility model, fig. 5 is a right view of the novel interactive visual acuity chart of the present utility model, fig. 6 is a top view of the novel interactive visual acuity chart of the present utility model, and fig. 7 is a bottom view of the novel interactive visual acuity chart of the present utility model.
As shown in fig. 1 to 7, the interactive visual chart 100 of the present utility model comprises a visual chart housing 200, a putting screen 300, a visual chart system 400, a control handle, a detection result printer 500 and a main control board, wherein the putting screen 300 is fixedly arranged on the visual chart housing 200, the visual chart system 400 is arranged in the visual chart housing 200 and is connected with the main control board, the control handle is in communication connection with the visual chart system 400, the detection result printer 500 is fixedly arranged at the lower part of the visual chart housing 200 and is connected with the main control board, and the main control board is fixedly arranged in the visual chart housing 200.
The visual acuity chart casing 200 is a three-dimensional round corner rectangular casing, and the visual acuity chart casing can be made of plastics, metals or alloys. The visual acuity chart housing can be manufactured in an integral molding mode or in an assembling mode. The upper edge of the eye chart housing 200 is provided with an upper protection plate 210 and the lower edge of the eye chart housing is provided with a lower protection plate 220.
The back of the visual acuity chart casing 200 is provided with a mounting rack 230, which is used for mounting and fixing the interactive visual acuity chart, and the mounting rack is provided with at least 1 mounting and fixing hole, in this embodiment, the number of the mounting and fixing holes is 4, and the 4 mounting and fixing holes form a rectangle.
The interactive visual acuity chart 100 further includes 1 wall hanging structure 600, the wall hanging structure 600 has at least 1 fixing through hole, and the fixing through hole of the wall hanging structure 600 can correspond to the mounting fixing hole on the mounting frame 230 and is fixedly connected. In this embodiment, the hanging structure is the structure of falling V style of calligraphy, and hanging structure's pointed end is up, and hanging structure's opening is down, is provided with 1 fixed through-hole on two stabilizer blades of hanging structure respectively, and every stabilizer blade fixed through-hole corresponds with 2 installation fixed orifices of mounting bracket upper end respectively and is connected.
The putting screen 300 comprises a glass plate and a lamp set box, the glass plate of the putting screen is fixedly arranged at the front part of the visual chart shell, and the lamp set box of the putting screen is fixedly arranged at the back part of the glass plate of the putting screen and is arranged in the visual chart shell. A plurality of optotypes for detecting vision are printed on the glass plate. The lamp set box is internally provided with the irradiation lamp, and the light emitted by the irradiation lamp can illuminate a plurality of optotypes on the glass plate, so that a vision tester at the observation side can observe the optotypes.
The optotype system 400 includes a first optotype area 410 and a second optotype area 420, where the first optotype area 410 and the second optotype area 420 are arranged in a left-right manner, and in this embodiment, the first optotype area is disposed on a left half of the drop screen, and the second optotype area is disposed on a right half of the drop screen. The first optotype region 410 includes a first optotype row, a second optotype row, a third optotype row, and a fourth optotype row. The second optotype region 420 includes a fifth optotype row, a sixth optotype row, a seventh optotype row, an eighth optotype row, a ninth optotype row, a tenth optotype row, an eleventh optotype row, a twelfth optotype row, a thirteenth optotype row, and a fourteenth optotype row.
The first optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the first optotype row includes 2 optotypes, and the 2 optotypes of the first optotype row are all E-shaped optotypes. In other embodiments, the 2 optotypes of the first optotype row may be C-shaped optotypes or other-shaped optotypes.
The second optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the second optotype row includes 2 optotypes, and the 2 optotypes of the second optotype row are all E-shaped optotypes. In other embodiments, the 2 optotypes of the second optotype row may be C-shaped optotypes or other-shaped optotypes.
The third optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the third optotype row includes 2 optotypes, and the 2 optotypes of the third optotype row are all E-shaped optotypes. In other embodiments, the 2 optotypes of the third optotype row may be C-shaped optotypes or other-shaped optotypes.
The fourth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the fourth optotype row includes 3 optotypes, and all of the 3 optotypes in the fourth optotype row are E-shaped optotypes. In other embodiments, the 3 optotypes of the fourth optotype row may be C-shaped optotypes or other-shaped optotypes.
The fifth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the fifth optotype row includes 3 optotypes, and all of the 3 optotypes in the fifth optotype row are E-shaped optotypes. In other embodiments, the 3 optotypes of the fifth optotype row may be C-shaped optotypes or other-shaped optotypes.
The sixth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the sixth optotype row includes 4 optotypes, and the 4 optotypes of the sixth optotype row are all E-shaped optotypes. In other embodiments, the 4 optotypes of the sixth optotype row may be C-shaped optotypes or other-shaped optotypes.
The seventh optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the seventh optotype row includes 4 optotypes, and the 4 optotypes of the seventh optotype row are all E-shaped optotypes. In other embodiments, the 4 optotypes of the seventh optotype row may be C-shaped optotypes or other-shaped optotypes.
The eighth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the eighth optotype row includes 5 optotypes, and all of the 5 optotypes in the eighth optotype row are E-shaped optotypes. In other embodiments, the 5 optotypes of the eighth optotype row may be C-shaped optotypes or other-shaped optotypes.
The ninth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the ninth optotype row includes 6 optotypes, and the 6 optotypes of the ninth optotype row are all E-shaped optotypes. In other embodiments, the 6 optotypes of the ninth optotype row may be C-shaped optotypes or other-shaped optotypes.
The tenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the tenth optotype row includes 7 optotypes, and the 7 optotypes of the tenth optotype row are all E-shaped optotypes. In other embodiments, the 7 optotypes of the tenth optotype row may be C-shaped optotypes or other-shaped optotypes.
The eleventh optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the eleventh optotype row includes 8 optotypes, and the 8 optotypes of the eleventh optotype row are all E-shaped optotypes. In other embodiments, the 8 optotypes of the eleventh optotype row may be C-shaped optotypes or other-shaped optotypes.
The twelfth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the twelfth optotype row includes 8 optotypes, and the 8 optotypes of the twelfth optotype row are all E-shaped optotypes. In other embodiments, the 8 optotypes of the twelfth optotype row may be C-shaped optotypes or other-shaped optotypes.
The thirteenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the thirteenth optotype row includes 8 optotypes, and the 8 optotypes of the thirteenth optotype row are all E-shaped optotypes. In other embodiments, the 8 targets of the thirteenth target line may be C-shaped targets or other font-shaped targets.
The fourteenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation. In this embodiment, the fourteenth optotype row includes 8 optotypes, and the 8 optotypes of the fourteenth optotype row are all E-shaped optotypes. In other embodiments, the 8 optotypes of the fourteenth optotype row may be C-shaped optotypes or other-shaped optotypes.
The control handle is provided with a signal sending module, and can send control signals to the main control board through the signal sending module. In this embodiment, the control handle communicates with the main control board in a wireless transmission manner, and in other embodiments, the control handle may be in communication connection with the main control board in a wired transmission manner.
The detection result printer 500 is fixedly arranged on the shell of the delivery screen, and in the embodiment, the detection result printer is fixedly arranged at the lower part of the shell of the delivery screen and is connected with the main control board. In this embodiment, the detection result printer is an embedded thermal printer, and in other embodiments, the detection result printer may be a pin printer or other type of printer.
The operation method of the interactive visual acuity chart comprises the following steps:
1. turning on a power supply and automatically detecting the system; 2. prompting the user to start detection by voice; 3. putting a visual target, and judging and feeding back a result by a user through a handle; 4. judging whether the system is correct or incorrect, and broadcasting 'correct' or 'incorrect' at the same time; 5. putting corresponding optotypes again according to the judgment result of 'correct' or 'error'; 6. the user judges the direction again and feeds back the result through the wireless handle; 7. judging whether the system is correct or incorrect, and broadcasting 'correct' or 'incorrect' at the same time; 8. and so on; 9. when the system judges that the user can not recognize the sighting mark with higher vision obviously, recording a test result; 10. left eye, binocular test (same procedure as first test) is selected by the handle; 11. the left eye, right eye and binocular vision detection ends the display result; 12. and broadcasting the detected eyesight by voice and informing the printed eyesight detection result.
The interactive visual acuity chart can automatically put in the detection visual acuity chart, the height of the visual acuity chart row is equal to the height of human eyes, the visual acuity chart can be automatically indicated, the accuracy is judged, the detection result is output finally, the detection result is not judged manually, the interactive visual acuity chart is more accurate, the interactive visual acuity chart meets the medical standard, the structure is simple, the operation is convenient, a large amount of cost is saved, the labor intensity is reduced, and the detection efficiency is high.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather to cover all modifications, adaptations, and alternatives falling within the spirit and scope of the present utility model.
Claims (10)
1. The utility model provides a novel interactive visual acuity chart, includes visual acuity chart casing, puts in the screen, visual acuity chart system, control handle, testing result printer and main control board, it is in to put in the fixed setting of screen on the visual acuity chart casing, visual acuity chart system set up in the visual acuity chart casing and with the main control board is connected, control handle with visual acuity chart system communication connection, testing result printer is fixed to be set up the lower part of visual acuity chart casing and with the main control board is connected, the main control board fixed set up in the inside of visual acuity chart casing, its characterized in that, visual acuity chart system includes first visual acuity chart district and second visual acuity chart district, first visual acuity chart district with the second visual acuity chart district is left and right arrangement structure.
2. The novel interactive visual acuity chart according to claim 1, wherein: the upper edge of the visual acuity chart shell is provided with an upper protection plate, and the lower edge of the visual acuity chart shell is provided with a lower protection plate.
3. The novel interactive visual acuity chart according to claim 1, wherein: the back of the visual acuity chart shell is provided with a mounting frame, and the mounting frame is provided with at least 1 mounting and fixing hole; the interactive visual acuity chart further comprises 1 wall hanging structure, wherein the wall hanging structure is provided with at least 1 fixing through hole.
4. The novel interactive visual acuity chart according to claim 1, wherein: the putting screen comprises a glass plate and a lamp box, the glass plate of the putting screen is fixedly arranged at the front part of the visual chart shell, and the lamp box of the putting screen is fixedly arranged at the back part of the glass plate of the putting screen and is arranged in the visual chart shell; the lamp set box is internally provided with a lighting lamp.
5. The novel interactive visual acuity chart according to claim 1, wherein: the first optotype region includes a first optotype row, a second optotype row, a third optotype row, and a fourth optotype row.
6. The novel interactive visual acuity chart according to claim 1, wherein: the second optotype region includes a fifth optotype row, a sixth optotype row, a seventh optotype row, an eighth optotype row, a ninth optotype row, a tenth optotype row, an eleventh optotype row, a twelfth optotype row, a thirteenth optotype row, and a fourteenth optotype row.
7. The novel interactive visual acuity chart as claimed in claim 5, wherein: the first optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the second optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the third optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the fourth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation.
8. The novel interactive visual acuity chart as claimed in claim 7, wherein: the first optotype row includes 2 optotypes; the second optotype row includes 2 optotypes; the third optotype row includes 2 optotypes; the fourth optotype row includes 3 optotypes.
9. The novel interactive visual acuity chart as claimed in claim 6, wherein: the fifth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the sixth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the seventh optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the eighth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the ninth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the tenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the eleventh optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the twelfth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the thirteenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation; the fourteenth optotype row comprises at least 1 optotype, and an EVA structure is arranged between two adjacent optotypes for separation.
10. The novel interactive visual acuity chart as claimed in claim 9, wherein: the fifth optotype row includes 3 optotypes; the sixth optotype row includes 4 optotypes; the seventh optotype row includes 4 optotypes; the eighth optotype row includes 5 optotypes; the ninth optotype row includes 6 optotypes; the tenth optotype row includes 7 optotypes; the eleventh optotype row includes 8 optotypes; the twelfth optotype row includes 8 optotypes; the thirteenth optotype row includes 8 optotypes; the fourteenth optotype row includes 8 optotypes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061550.3U CN219021141U (en) | 2022-11-18 | 2022-11-18 | Novel interactive visual acuity chart |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223061550.3U CN219021141U (en) | 2022-11-18 | 2022-11-18 | Novel interactive visual acuity chart |
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| Publication Number | Publication Date |
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| CN219021141U true CN219021141U (en) | 2023-05-16 |
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| CN202223061550.3U Active CN219021141U (en) | 2022-11-18 | 2022-11-18 | Novel interactive visual acuity chart |
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