CN211985392U - Special visual chart lamp box - Google Patents

Abstract

The utility model provides a dedicated visual chart lamp house, including display panel, be provided with the visual chart on the panel, be provided with the background light in the panel, the background light includes red background light and green background light, be provided with the control unit in the lamp house, the control unit is used for receiving control signal and controls the luminous colour of background light, the specific inspection method of dedicated visual chart lamp house cooperation can be with digital quantization with the subjective impression of person under examination to carry out accurate comparison to the inspection result, avoid because subjective impression and individual language expression cause the error is judged to the clarity of different base colour optotypes.

Description

Special visual chart lamp box

Technical Field

The utility model relates to the field of medical equipment, concretely relates to dedicated visual chart lamp house.

Background

In the traditional clinical optometry process, a common method comprises an objective optometry process and a subjective optometry process, wherein the subjective optometry process comprises a red-green visual inspection method, and the red-green visual inspection method judges the refraction correction state by detecting the definition degrees of visual red and green ground color visual marks of a detected person; the red and green sighting mark is a common instrument of red and green vision inspection method, and is formed from a group of red and green with black double ring, when the red and green vision inspection is made, the eye to be inspected can see the red and green sighting mark to distinguish which color black double ring is clear, and the optometrist can reduce the sphere lens number to that black double ring in the red and green sighting mark can be seen as clear so as to implement sphere lens number identification.

However, the result of the red-green visual inspection is that whether the answer of the person to be inspected is clear or not and cannot be quantified, but the subjective feeling and the individual language expression are adopted, the error of the result is very easy to cause for the children or adults with poor expression ability, and when the definition degrees of the red and green background color visual targets are close, the error of the answer of the person to be inspected is also very easy to cause, so that the error becomes an uncontrollable interference factor, and the refractive correction is under-corrected or over-corrected.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a dedicated visual chart lamp house can be with the subject impression digitization of examined person, reduces interference factor, improves the degree of accuracy that the refraction state of correction judges.

The purpose of the utility model is realized by adopting the following technical scheme:

a special visual chart lamp box comprises a display panel, wherein a visual chart is arranged on the panel, a background lamp is arranged in the panel and comprises a red background lamp and a green background lamp, and a control unit is arranged in the lamp box and used for receiving a control signal and controlling the light emitting color of the background lamp;

preferably, the background light further comprises one or two of yellow background light and white background light;

preferably, the special visual chart light box further comprises a visual chart switch;

preferably, the visual chart is a logarithmic visual chart or an international logarithmic visual chart or a Langerhans's annular visual chart, or a plurality of rows of E-shaped signs or C-shaped signs or figures which are different in size and opening direction and can be distinguished by children;

preferably, the light-emitting wavelength of the red background light is 620 ± 5nm, the light-emitting wavelength of the green background light is 535 ± 5nm, the light-emitting wavelength of the yellow background light is 570 ± 5nm, and the color temperature of the white background light is 6500 ± 300K;

preferably, the special visual chart light box further comprises a remote controller;

preferably, the special visual chart lamp box further comprises a rear panel, the length and the width of the rear panel are consistent with those of the display panel, the rear panel is attached to the rear of the display panel, and a protective frame is arranged around the attached panel.

The utility model has the advantages that:

traditional visual chart lamp house is white monochromatic, only is used for the eyesight to measure, can not be used for red green test, the utility model discloses combine traditional visual chart and red green test method, provide a dedicated visual chart lamp house for red green test, including red background light and green background light, optional control background light colour, use dedicated visual chart lamp house can carry out red green test, and the accessible is examined the sighting mark quantity of the eye correct interpretation and quantizes red green test result to carry out the accuracy and compare the inspection result, avoid because subjective impression and individual language expression cause the clear degree judgement error to red green bottom color sighting mark to refraction correction is owed to correct or is overcorrected.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a schematic front view of a special visual chart light box according to embodiment 1 of the present invention;

fig. 2 is a rear view schematic diagram of the special visual chart light box according to embodiment 1 of the present invention.

Reference numerals: 1-frame connecting member; 2-short frame; 3-long frame; 4-a display panel; 5-visual chart switch; 6-remote controller; 7-a button; 9-battery cover; 10-a rear panel; 11-set screw.

Detailed Description

The invention will be further described with reference to the following examples.

Example 1

The embodiment of the utility model relates to a dedicated visual chart lamp house, including display panel 4, be provided with the visual chart on the panel, be provided with the background light in the panel, the colour of background light is red, green, yellow and white, be provided with the control unit in the lamp house, the control unit is used for receiving control signal and controls the luminous colour of background light, wherein:

the vision chart with red background is used for judging the under-correction state of the refractive correction of the tested person;

the green background eye chart is used for judging the overcorrection state of the refractive correction of the detected person;

the yellow background visual acuity chart is used for the reference of naked eye or vision examination through refractive correction, naked eye vision and the examination results of the red and green visual acuity charts of the testee in the clinical optometry process;

the white background visual chart is reserved for the white background color of the traditional visual chart;

a visual chart switch 5 is arranged below the visual chart lamp box, and the visual chart is a logarithmic visual chart or an international logarithmic visual chart or a Langerhans's visual chart, or a plurality of rows of ' E ' character marks or ' C ' character marks with different sizes and opening directions or graphs which can be distinguished by children; distance vision measures from 0.1 to 1.5 (or from 4.0 to 5.2); each row has a label, the normal of the visual chart operation side of the tested person is parallel to one row of 1.0, and the tested person is 5 meters away from the visual chart to carry out visual inspection; near vision measures from 0.05-1.2 (or from 3.7-5.1), each row has a label, and the vision examination is carried out at the position 33 cm away from the visual chart of the examinee;

the light-emitting wavelength of the red background light is 620 +/-5 nm, and the light-emitting wavelength of the green background light is 535 +/-5 nm; the luminous wavelength of the yellow background light is 570 +/-5 nm, and the color temperature of the white background light is 6500 +/-300K;

the visual chart light box also comprises a remote controller 6, the control unit is used for receiving a signal sent by the remote controller and generating a control signal, the control signal is used for controlling the color of a background light, the front side of the remote controller is provided with a button 7, and the back side of the remote controller is provided with a battery groove and a battery cover 9; the visual chart lamp box also comprises a rear panel 10, the length and the width of the rear panel are consistent with those of the display panel 4, the rear panel is attached to the rear part of the display panel 4, and a protective frame is arranged around the attached panel; the protective frame comprises a long frame 3 and a short frame 2, wherein the long frame 3 and the short frame 2 are connected through a frame connecting piece 1 and fixed through a fixing screw 11.

This embodiment dedicated visual chart lamp house can carry out red green test, remains traditional white visual chart simultaneously, has changeable multiple functions, examines and to reduce the required equipment quantity of inspection, simplifies the inspection process.

Example 2

The utility model provides a dedicated visual chart lamp house to but logarithmic vision table or international logarithmic vision table or the blue ring visual chart are the basis, but the colour of remote control selection background light: red and green for judging the definition of the visual target of the red and green background colors of the eye to be detected, which comprises the following steps:

(1) placing an optometry inserting sheet according to the maximum emmetropic maximum visual acuity (MPMVA) result, recording the minimum visual acuity row of the eye to be inspected, which can be completely and correctly interpreted in the whole row in the traditional visual acuity chart, wherein the minimum visual acuity row refers to the row where the minimum visual target which can be interpreted by the eye is located, and generally 1.0 or 1.2 according to the correction result;

(2) under a red background light, the eye to be detected watches a special visual chart light box, the minimum visual line is interpreted, and the number of visual targets for correctly interpreting the visual line is recorded as Ra;

(3) under a green background light, the eye to be detected watches a special visual chart light box, the minimum visual line is read again, and the number of the sighting marks for correctly reading the visual line is recorded and is Rb;

(4) comparing the number of correctly interpreted optotypes

If Ra is more than Rb, the detected eye is judged to be clearer as the red background color sighting mark than the green background color sighting mark, and the eye is in an under-correction state;

if Ra is less than Rb, the detected eye is judged to be more clear than the red background color visual target, and the detected eye is in an overcorrection state;

if Ra is Rb, the eye to be detected is judged to be clear as the red and green background color optotypes, and the eye is in a foot correction state or an approximate foot correction state.

This embodiment is different with the red green test method that the tradition only relied on subjective impression to judge, uses dedicated visual chart lamp house can carry out red green test, and the accessible is examined the sighting target quantity of eyes correct interpretation and is quantized red green test result to carry out the accuracy to the inspection result and compare, avoid because subjective impression and individual language express and make the definition degree judgement mistake to red green base colour sighting target, so that the refraction is corrected and is owed to correct or the mistake is corrected.

Example 3

In embodiment 2, the backlights of the dedicated eye chart light box further include a white backlight and a yellow backlight;

in the step (1), the special visual chart lamp box is controlled to be switched to a white background lamp to be used as the traditional visual chart;

when the corrected vision is adjusted to the foot correction state, the background light is adjusted to be yellow, the eyes are checked to see simultaneously, the balance check and the try-on adjustment of the eyes are carried out, and the prescription is given.

Multiple background light colour possesses simultaneously, makes the visual chart lamp house has changeable multiple functions, uses dedicated visual chart lamp house is examined and can be reduced the required equipment quantity of inspection, simplifies the inspection process.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims (8)

1. The special visual chart lamp box comprises a display panel, wherein a visual chart is arranged on the panel, and a background lamp is arranged in the panel.

2. The special visual chart light box of claim 1, wherein the background light further comprises one or two of yellow background light and white background light.

3. The customized eye chart light box of claim 1, further comprising an eye chart switch.

4. The special visual chart light box of claim 1, wherein the visual chart is a logarithmic visual chart or an international logarithmic visual chart or a Langerhans's annular visual chart, or is a plurality of rows of ' E ' marks or ' C ' marks with different sizes and different opening directions or figures which can be distinguished by children.

5. The special visual chart light box of claim 1, wherein the light emitting wavelength of the red background light is 620 ± 5nm, and the light emitting wavelength of the green background light is 535 ± 5 nm.

6. The special visual chart light box of claim 2, wherein the light emitting wavelength of the yellow background light is 570 ± 5nm, and the color temperature of the white background light is 6500 ± 300K.

7. The customized eye chart light box of any one of claims 1-6, wherein the customized eye chart light box further comprises a remote controller.

8. The special visual chart light box of any one of claims 1-6, further comprising a back panel having a length and a width consistent with those of the display panel and attached to the back of the display panel, wherein a protective frame is disposed around the attached panel.

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