CN111281331A

CN111281331A - Vision detection method and device and wearable display device

Info

Publication number: CN111281331A
Application number: CN202010253937.5A
Authority: CN
Inventors: 栗可; 刘玉红; 武玉龙; 彭金豹; 王晨如; 董瑞君; 白家荣; 张�浩; 陈丽莉
Original assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Beijing BOE Optoelectronics Technology Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-06-16
Anticipated expiration: 2040-04-02
Also published as: WO2021196992A1; CN111281331B

Abstract

The application discloses a vision detection method and device and wearable display equipment, and relates to the technical field of vision detection. The method can receive a first confirmation operation executed by a vision detection user in the process of adjusting the position of an imaging surface of the wearable display device, determine a first target distance between the imaging surface and a target plane, and finally determine a target vision corresponding to the first target distance as the vision of the vision detection user according to a first corresponding relation between the distance and the vision. The vision detection method provided by the application can be used for automatically completing vision detection by a vision test user without the assistance of a doctor, and the vision detection efficiency is higher.

Description

Vision detection method and device and wearable display device

Technical Field

The application relates to the technical field of vision detection, in particular to a vision detection method and device and wearable display equipment.

Background

The eyes are used as important organs for sensing light, and have great significance for human bodies to obtain external things. However, the user cannot see the external objects clearly due to improper use of his or her eyes, and needs to detect the eyesight of his or her eyes to correct the eyesight.

In the related art, a user needs to test eyesight by using an eye chart with the assistance of a doctor. In addition, in the process of vision test, a doctor is required to designate a symbol on the eye chart by using an indicator, then the user recognizes the symbol and informs the doctor, and finally the doctor determines the vision of the user according to the recognition result of the user recognition symbol.

However, the vision testing method in the related art can be performed with the assistance of a doctor, and the efficiency of vision testing is low.

Disclosure of Invention

The application provides a vision detection method and device and wearable display equipment, which can solve the problem of low efficiency of vision detection in the related art. The technical scheme is as follows:

in one aspect, a vision detection method is provided, which is applied to a wearable display device, and the method includes:

receiving a first confirmation operation performed by a vision testing user in the process of adjusting the position of the imaging surface of the wearable display device;

determining a first target distance between the imaging plane and a target plane when the first confirmation operation is received, wherein the target plane is a plane where eyes of a user wearing the wearable display device are located;

and determining the target vision corresponding to the first target distance as the vision of the vision detection user according to the first corresponding relation between the distance and the vision.

Optionally, the adjusting the position of the imaging plane of the wearable display device includes:

and in response to a vision detection instruction, moving the imaging surface from an initial position in a direction approaching the target plane.

Optionally, the determining a first target distance between the imaging plane and the target plane when the first confirmation operation is received includes:

determining a movement distance that the imaging surface moves relative to an initial position when the first confirmation operation is received;

and determining a first target distance between the imaging plane and the target plane according to the moving distance and the distance between the initial position and the target plane.

Optionally, the determining a movement distance that the imaging surface moves relative to the initial position when the first confirmation operation is received includes:

determining the moving distance of the imaging surface relative to the initial position according to the moving speed of the imaging surface and the moving duration of the imaging surface;

wherein the moving time length refers to a time length from when the imaging surface starts to move to when the first confirmation operation is received.

Optionally, before adjusting the position of the imaging plane of the wearable display device, the method further includes:

and controlling the imaging surface to move to the initial position in response to a reset instruction.

Optionally, before the receiving vision test user performs the first confirmation operation, the method further includes:

and playing first voice, wherein the first voice is used for indicating a vision detection user to trigger the first confirmation operation when at least the image displayed in the first area in the imaging plane can be seen clearly.

Optionally, after the determining the first target distance between the imaging plane and the target plane when the first confirmation operation is received, the method further includes:

determining a first refractive power corresponding to the first target distance;

and determining the myopia degree of the vision detection user according to the first refractive power.

receiving a second confirmation operation performed by the vision testing user in the process of adjusting the position of the imaging surface of the wearable display device;

determining a second target distance between the imaging plane and the target plane when the second confirmation operation is received;

determining a second refractive power corresponding to the second target distance;

determining an astigmatic power of the vision testing user from the first refractive power and the second refractive power.

Optionally, the determining a first refractive power corresponding to the first target distance includes:

determining a first refractive power corresponding to the first target distance according to a second corresponding relation between the distance and the refractive power;

the determining a second refractive power corresponding to the first target distance comprises:

and determining a second refractive power corresponding to the second target distance according to the second corresponding relation.

Optionally, the determining the degree of astigmatism of the vision testing user according to the first refractive power and the second refractive power comprises:

determining a difference between the second refractive power and the first refractive power;

and determining the astigmatic power of the vision detection user according to the difference value.

and playing second voice, wherein the second voice is used for indicating a vision detection user to trigger the second confirmation operation when the image displayed in the second area in the imaging plane can be seen clearly.

Optionally, the method further includes:

receiving a third confirmation operation performed by a sample user in the process of adjusting the position of the imaging surface of the wearable display device;

determining a sample distance of the imaging plane from the target plane when the third confirmation operation is received;

and determining the first corresponding relation according to the vision of the sample user and the sample distance.

In another aspect, a vision testing apparatus is provided, which is applied to a wearable display device, the apparatus includes:

the first receiving module is used for receiving a first confirmation operation executed by a vision detection user in the process of adjusting the position of an imaging surface of the wearable display device;

a first determining module, configured to determine a first target distance between the imaging plane and a target plane when the first confirmation operation is received, where the target plane is a plane where eyes of a user wearing the wearable display device are located;

and the second determining module is used for determining the target vision corresponding to the first target distance as the vision of the vision detection user according to the first corresponding relation between the distance and the vision.

In yet another aspect, a wearable display apparatus is provided, the wearable display apparatus comprising: a processor and a memory, the memory being used for storing instructions executed by the processor, the processor implementing the vision detection method of the above aspect by executing the instructions stored in the memory.

In yet another aspect, a computer-readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the vision detection method as described in the above aspect.

The beneficial effect that technical scheme that this application provided brought includes at least:

the method can receive a first confirmation operation executed by a vision detection user in the process of adjusting the position of an imaging surface of the wearable display device, determine a first target distance between the imaging surface and a target plane, and finally determine the target vision corresponding to the first target distance as the vision of the vision detection user according to a first corresponding relation between the distance and the vision. The vision detection method provided by the application can be used for automatically completing vision detection by a vision test user without the assistance of a doctor, and the vision detection efficiency is higher. And the process of vision detection is not limited by areas, and the flexibility is higher.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of an astigmatism provided by an embodiment of the present application;

fig. 2 is a schematic diagram of a wearable display device provided in an embodiment of the present application;

FIG. 3 is a flow chart of a vision testing method provided by an embodiment of the present application;

FIG. 4 is a flow chart of another vision testing method provided by embodiments of the present application;

FIG. 5 is a schematic diagram of a lens and an imaging plane according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of another lens and imaging surface provided by embodiments of the present application;

FIG. 7 is a schematic diagram of an image displayed on an imaging surface according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of an image displayed in an imaging plane as seen by a vision testing user according to an embodiment of the present application;

FIG. 9 is a schematic diagram of an image displayed in an imaging plane as seen by a vision testing user according to an embodiment of the present application;

FIG. 10 is a flowchart of a method for determining a first distance-to-vision correspondence provided by an embodiment of the present application;

FIG. 11 is a schematic view of a vision testing apparatus provided in an embodiment of the present application;

FIG. 12 is a schematic view of another vision testing apparatus provided in an embodiment of the present application;

FIG. 13 is a schematic diagram of a first determination module provided by an embodiment of the present application;

FIG. 14 is a schematic view of another vision testing apparatus provided in an embodiment of the present application;

fig. 15 is a schematic diagram of another wearable display device provided in an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The lens spasm of the user's eyes or the length of the eye axis changes due to the long-term bad eye habits of the user, resulting in the problem of ametropia of the eyes. Refractive errors may include, among others, myopia, hyperopia, and astigmatism.

Myopia is usually due to the fact that the user's eye is long-term near, resulting in a strong refractive power of the lens of the eye or a long length of the eye axis, near objects can be imaged sharply on the retina, and distant objects cannot be imaged sharply on the retina. Typically, the user can correct myopia by wearing a concave lens.

Hyperopia is usually due to the age of the user, with the ciliary muscle of the eye being constantly relaxed, resulting in a weak lens power or a shorter length of the eye axis, with distant objects being clearly imaged on the retina and near objects not being clearly imaged on the retina. Typically, the user can correct for hyperopia by wearing convex lenses.

Astigmatism is generally due to the fact that the user's eye has two imaging foci with different powers in different directions (for example in the meridional and sagittal directions), and with reference to fig. 1, the light source 01 passes sequentially through the cornea 02, the iris 03, and the lens 04 to form one focus a in front of the retina 05 and another focus a behind the retina 05. Typically, the user can correct for astigmatism by wearing a cylindrical lens. In this embodiment, the meridional direction refers to a vertical direction of an imaging plane of the wearable display device, and the sagittal direction refers to a horizontal direction of the imaging plane of the wearable display device.

In order to correct the vision of the user, the vision of the user needs to be detected. However, the vision testing method in the related art can be performed only with the assistance of a doctor, and the efficiency of vision testing is low. Moreover, when the vision detection is carried out, the user needs to go to places such as a hospital or a glasses shop for detection, the vision detection is limited by the geographical position, and the flexibility is poor.

Fig. 2 is a schematic diagram of a wearable display device provided in an embodiment of the present application. Wherein the wearable display device 10 may be a head-mounted display device, for example, a Virtual Reality (VR) device or an Augmented Reality (AR) device.

The vision detection method provided by the embodiment of the application can solve the problem of low efficiency of vision detection in the related art, and the method can be applied to the wearable display device 10 shown in fig. 2, and referring to fig. 3, the method can include:

step 201, in the process of adjusting the position of the imaging surface of the wearable display device, receiving a first confirmation operation performed by a vision detection user.

In this embodiment of the application, when the wearable display device is used for vision detection, an image may be displayed on an imaging surface of the wearable display device. The vision detection user can wear the wearable display device and check the image displayed by the imaging surface of the wearable display device to detect the vision of the user.

The position of the imaging surface of the wearable display device can be adjusted, and in the process that the wearable display device adjusts the position of the imaging surface of the wearable display device, the vision detection user can see that an image displayed by the imaging surface of the wearable display device is changed into clear by blurring. When the vision detection user can clearly see the image displayed on the imaging surface of the wearable display device, a first confirmation operation can be triggered. At this time, the wearable display device may receive the first confirmation operation performed by the vision testing user.

Optionally, the first confirmation operation may be a click operation, and the click operation may be an operation of clicking a preset key (a confirmation key in the wearable display device). Alternatively, the first confirmation operation may be a voice operation, for example, the vision testing user uttering a "confirmation" voice.

Step 202, determining a first target distance between the imaging surface and the target plane when the first confirmation operation is received.

In this embodiment of the application, when receiving a first confirmation operation performed by a vision test user, the wearable display device may determine a first target distance between an imaging surface and a target plane of the vision test user when performing the first confirmation operation. Wherein the target plane is a plane where eyes of a user wearing the wearable display device are located. That is, the first target distance is a distance between an imaging plane of the wearable display device and an eye of a vision testing user.

And step 203, determining the target vision corresponding to the first target distance as the vision of the vision detection user according to the first corresponding relation between the distance and the vision.

In this embodiment of the application, a first corresponding relationship between distance and eyesight may be stored in advance in the wearable display device, and after the wearable display device determines the first target distance, the target eyesight corresponding to the first target distance may be directly determined as the eyesight of the eyesight test user according to the first corresponding relationship.

In summary, the embodiment of the present application provides a vision testing method, which may receive a first confirmation operation performed by a vision testing user in a process of adjusting a position of an imaging plane of a wearable display device, determine a first target distance between the imaging plane and a target plane, and finally determine a target vision corresponding to the first target distance as a vision of the vision testing user according to a first corresponding relationship between the distance and the vision. The vision detection method provided by the embodiment of the application can be used for automatically completing vision detection by a vision test user without the assistance of a doctor, and the vision detection efficiency is higher. And the process of vision detection is not limited by areas, and the flexibility is higher.

Fig. 4 is a flowchart of another vision testing method provided in the embodiment of the present application, which may be applied to the wearable display device 10 shown in fig. 2. As can be seen with reference to fig. 4, the method may include:

and 301, responding to a reset instruction, and controlling the imaging surface to move to an initial position.

In this application embodiment, before the vision test user adopts wearable display device to carry out vision test, the vision test user can carry out the operation that resets earlier, and wearable display device can receive the instruction that resets that generates based on this operation that resets to respond to this instruction that resets, control wearable display device's imaging surface and move to initial position.

The initial position may be a position where an imaging plane of the wearable display device is farthest from the target plane within a moving range of the wearable display device, so that a distance between the imaging plane and an eye of a vision testing user may gradually decrease during the vision testing process of the vision testing user.

For example, assuming that the distance between the imaging plane of the wearable display device and the target plane is in the range of 0.2m (meter) to 5m, the initial position of the imaging plane is a position where the distance between the imaging plane and the target plane is 5 m.

In the present embodiment, referring to fig. 5, the wearable display device 00 may include a motor (not shown in the figure) and a lens 101. And, the wearable display apparatus may further include: a lens barrel (not shown), to which the lens 101 may be fixedly connected, and a motor may be rotatably connected. The motor rotates to drive the lens barrel to rotate, the lens barrel rotates to drive the lens 101 to move, and the position of the imaging surface 102 can be adjusted by moving the lens 101. After receiving the reset instruction, the wearable display device can control the motor to rotate in response to the reset instruction so as to control the imaging surface of the wearable display device to move to the initial position.

The wearable display device can acquire the rotating speed of the motor and determine the moving speed of the imaging surface according to the rotating speed of the motor. Also, the moving speed of the image forming surface may be positively correlated with the rotation speed of the motor. That is, the greater the rotation speed of the motor, the greater the moving speed of the image forming surface, and the smaller the rotation speed of the motor, the smaller the moving speed of the image forming surface.

During the reset, the rotational speed of the motor may be a fixed value, for example, 9 rpm. Accordingly, the moving speed of the image formation surface may also be a fixed value, and may be 40cm/s (centimeters per second), for example. Of course, the wearable display device can also adjust the moving speed of the imaging surface by adjusting the rotating speed of the motor. Alternatively, the moving speed of the imaging plane during the reset may range from 40cm/s to 60 cm/s.

It should be noted that, in the resetting process, the rotating speed of the motor is high, so that the moving speed of the imaging surface can be increased, the resetting time can be shortened, and the efficiency of vision detection can be further improved.

Alternatively, the reset operation may be a click operation, and the click operation may be an operation of clicking a preset key (a reset key in the wearable display device). Alternatively, the reset operation may be a voice operation, for example, a vision testing user uttering a "reset" voice. Of course, the reset instruction may also be generated by other user triggers, such as may be generated by a physician trigger.

Alternatively, the user may not need to perform a reset operation, and the wearable display device may automatically complete the reset each time it is turned on.

And step 302, responding to the vision detection instruction, and moving the imaging surface from the initial position in the direction close to the target plane.

In the embodiment of the application, the imaging surface of the wearable display device can display images. The vision detection user can wear the wearable display device and check the image displayed by the imaging surface of the wearable display device to detect the vision of the wearable display device.

In the vision testing process, a vision testing user can execute testing operation firstly, the wearable display device can receive a testing instruction generated based on the testing operation, and the position of the lens is adjusted by controlling the motor to rotate in response to the vision testing instruction, so that the position of an imaging surface of the wearable display device is adjusted from the initial position along the direction close to the target plane.

Alternatively, the detection operation may be a click operation, and the click operation may be an operation of clicking a preset key (a detection key in the wearable display device). Alternatively, the detection operation may be a voice operation, for example, a vision detecting user uttering a "start detection" voice. Of course, the detection instruction may also be generated by other user triggers, for example, by a physician.

Step 303, receiving a first confirmation operation performed by the vision testing user in the process of adjusting the position of the imaging surface of the wearable display device.

In the embodiment of the application, in the process that the wearable display device adjusts the position of the imaging surface of the wearable display device, that is, after the imaging surface of the wearable display device starts to move from the initial position, the vision test user can see that the image displayed by the imaging surface of the wearable display device is blurred. When the vision detection user can clearly see the image displayed on the imaging surface of the wearable display device, a first confirmation operation can be triggered. At this time, the wearable display device may receive the first confirmation operation performed by the vision testing user.

The first confirmation operation may be a click operation, and the click operation may be an operation of clicking a preset key (a confirmation key in the wearable display device). Alternatively, the first confirmation operation may be a voice operation, for example, the vision detection user speaks a "confirmation" voice, which is not limited in this embodiment of the present application.

Optionally, before the wearable display device receives a first confirmation operation performed by the vision test user, the wearable display device may play a first voice, where the first voice may be used to remind the vision test user of triggering the first confirmation operation when the image of the first area displayed on the imaging surface of the wearable display device can be seen clearly. The first region may be any region of the imaging surface, and the first region may be a partial region or a whole region of the imaging surface.

For example, the first voice may be "please click a confirmation key when at least a part of the displayed image can be seen clearly".

Alternatively, the specification of the wearable display device may be recorded with the detection steps, and the vision test user may refer to the specification to determine the operation flow of the wearable display device before performing vision test by using the wearable display device, and perform vision test autonomously. I.e. the wearable display device may not need to play the first voice either.

And step 304, determining the moving distance of the imaging surface relative to the initial position when the first confirmation operation is received.

In this embodiment of the application, when the wearable display device receives a first confirmation operation performed by a vision test user, the wearable display device may determine a movement distance that an imaging surface of the wearable display device moves relative to an initial position when the vision test user performs the first confirmation operation.

Referring to fig. 6, the initial position b of the imaging plane 102 is located at a distance d1 from the target plane a. It is assumed that the wearable display device is located at a position where the distance between the imaging plane 102 and the initial position b of the imaging plane is d2 when receiving the first confirmation operation, that is, the wearable display device moves the imaging plane 102 by the distance d2 when receiving the first confirmation operation.

In the embodiment of the present application, the wearable display device may determine the moving distance d2 of the imaging plane relative to the initial position b according to the moving speed of the imaging plane and the moving duration of the imaging plane. The moving time length refers to the time length from the beginning of the movement of the imaging surface to the receiving of the first confirmation operation. The moving time period may also refer to a running time period from the start of the motor running to the reception of the first confirmation operation.

During the vision test, the rotation speed of the motor may be a fixed value, for example, 5 rpm. Accordingly, the moving speed of the image formation surface may be a fixed value, for example, 25 cm/s. Of course, the wearable display device can adjust the moving speed of the imaging surface by adjusting the rotating speed of the motor. Alternatively, the moving speed of the imaging surface may range from 20cm/s to 30cm/s during vision testing.

In this application embodiment, less with the rotational speed setting of visual acuity test in-process motor, can be so that the translation rate of imaging surface is less, can be convenient for the user adopt this wearable display device to carry out visual acuity test, user experience is better.

For example, assuming that the wearable display device determines that the moving speed of the imaging plane is v1 and the moving time length of the imaging plane is t1, the wearable display device may determine that the moving distance d2 is the product of the moving speed v1 of the imaging plane and the moving time length t1 of the imaging plane, that is, the moving distance d2 satisfies: d2 ═ v1 × t 1.

And 305, determining a first target distance between the imaging plane and the target plane according to the moving distance and the distance between the initial position and the target plane.

In the embodiment of the present application, the distance between the initial position and the target plane may be stored in the wearable display device in advance. The wearable display device may determine a first target distance d3 between the imaging plane and the target plane according to the moving distance d2 of the imaging plane moving relative to the initial position and the distance d1 between the initial position and the target plane determined in step 304.

Alternatively, referring to fig. 6, the wearable display device may determine the difference between the distance d1 between the initial position and the target plane and the moving distance d2 as the first target distance d3 between the imaging plane and the target plane, that is, the first target distance d3 satisfies: d 3-d 1-d 2.

And step 306, determining the target vision corresponding to the first target distance as the vision of the vision detection user according to the first corresponding relation between the distance and the vision.

In this embodiment of the application, a first corresponding relationship between a distance and a vision may be stored in advance in the wearable display device, and after the wearable display device determines the first target distance, the target vision corresponding to the first target distance may be determined as the vision of the vision detection user.

Optionally, the first corresponding relationship may be a corresponding relationship between distance ranges and eyesight, and each distance range corresponds to one eyesight. Table 1 is a table of correspondence between distance ranges and eyesight provided in the embodiments of the present application. Referring to table 1, a distance range greater than or equal to 0.1m and less than 0.5m corresponds to a vision of 3.8. A distance of 5.0m corresponds to a vision of 5.2 or 5.3. Wherein, the vision in table 1 is detected for the sample user using a logarithmic visual acuity chart.

TABLE 1

Distance range (m)	Eyesight improving instrument
		[0.1，0.5)	3.8
[0.5，1.0)	3.9
		[1.0，1.5)	4.0
[1.5，2.0)	4.1
		[2.0，2.5)	4.2
[2.5，3.0)	4.3
		[3.0，3.3)	4.4
[3.3，3.5)	4.5
		[3.5，3.8)	4.6
[3.8，4.0)	4.7
		[4.0，4.3)	4.8
[4.3，4.5)	4.9
		[4.5，4.8)	5.0
[4.8，5.0)	5.1
		(5.0)	5.2-5.3

For example, if the first target distance determined according to step 305 is 0.3m, the wearable display device may determine 3.8 as the vision of the vision testing user.

Alternatively, the first corresponding relationship may be a distance-to-vision functional relationship in which vision is inversely related to distance. That is, if the first target distance detected by the wearable display device is larger, the determined eyesight of the eyesight detection user is worse; if the first target distance detected by the wearable display device is smaller, the determined vision of the vision detection user is better.

Step 307, a first refractive power corresponding to the first target distance is determined.

In the embodiment of the present application, the wearable display device may store the second corresponding relationship between the distance and the refractive power in advance. After determining the first target distance, the wearable display device may determine a first refractive power corresponding to the first target distance according to the second correspondence.

Table 2 is a table of correspondence between distance and refractive power provided in the embodiments of the present application. Referring to table 2, a distance of 1.000m corresponds to a refractive power of 1 diopter (D), and a distance of 0.250m corresponds to a refractive power of 4D.

TABLE 2

Distance (m)	Refractive power (D)
		1.000m	1D
0.500m	2D
		0.333m	3D
0.250m	4D
		0.200m	5D
0.170m	6D
		0.140m	7D
0.125m	8D

Assuming that the wearable display device determines that the first target distance is 0.333m according to step 305, the wearable display device may determine that the first refractive power corresponding to the first target distance 0.333m is 3D according to table 2.

Alternatively, assuming that the wearable display device determines that the first target distance is 0.500m according to step 305, the wearable display device may determine that the first refractive power corresponding to the first target distance of 0.500m is 2D according to table 2.

And step 308, determining the myopia degree of the vision detection user according to the first refractive power.

In this embodiment, the wearable display device may determine the myopia degree of the vision testing user according to the first refractive power determined in step 307.

For example, the wearable display device may determine the first refractive power multiplied by a pre-stored scaling factor as the degree of myopia of the vision detecting user.

Assuming that the scale factor is 100 and the wearable display device determines that the first refractive power is 3D according to the step 307, the wearable display device may determine that the myopia degree of the vision testing user is 3 × 100 — 300 degrees.

Alternatively, assuming that the wearable display device determines that the first refractive power is 2D according to the above step 307, the wearable display device may determine that the myopia degree of the vision testing user is 2 × 100 — 200 degrees.

Step 309, in the process of adjusting the position of the imaging surface of the wearable display device, receiving a second confirmation operation performed by the vision testing user.

In the embodiment of the present application, if the eyes of the vision testing user are simply myopic, the degree of sharpness of the image in the imaging plane seen by the vision testing user is the same no matter where the position of the imaging plane is. Therefore, in the process that the imaging surface moves along the direction close to the target plane, the vision test user can see that the images displayed in all areas of the imaging surface are gradually clear from the blur, and the vision test user can execute the first confirmation operation until the vision test user completely sees all the images displayed in the imaging surface.

If the eyes of the vision testing user have astigmatism problems in addition to the myopia problem, that is, the eyes of the vision testing user are complex myopic astigmatism, the degree of sharpness of the image in the imaging plane seen by the vision testing user is different no matter where the position of the imaging plane is. Namely, no matter where the position of the imaging surface is, the vision test user can see clear images of some areas of the imaging surface and fuzzy images of some areas. That is, during the process that the imaging plane moves in the direction close to the target plane, the vision testing user can see that the image displayed in the first area of the imaging plane is changed from blurring to blurring, and the image displayed in the second area is blurred until the vision testing user finishes seeing the image in the first area of the imaging plane, and the first confirmation operation can be executed. The first area and the second area are both partial areas of an imaging surface, and the first area and the second area are not overlapped.

Therefore, if the eyes of the vision detection user are complex myopia and astigmatism, further, the wearable display device can continue to control the motor to rotate, so that the imaging surface of the wearable display device continues to move towards the direction close to the target plane. When the user waiting for the visual acuity test can clearly see the image of the second area which cannot be seen when the first confirmation operation is performed, and cannot clearly see the image of the first area which can be seen when the first confirmation operation is performed, the second confirmation operation may be triggered. At this time, the wearable display device may receive a second confirmation operation performed by the vision testing user.

In this embodiment of the application, in order to facilitate a user to accurately confirm whether an image in an imaging plane can be seen clearly, as shown in fig. 7, the image displayed in the imaging plane may include: a plurality of lines, and these a plurality of lines can be in circular distribution. That is, the extending direction of each line in the plurality of lines intersects at one point. Accordingly, in the process that the wearable device moves the imaging plane, as shown in fig. 8, the vision testing user may perform the first confirmation operation when the user can clearly see the image of the area where the 90 ° (degree) axis is located in the imaging plane, but cannot clearly see the image of the area where the 180 ° axis is located in the imaging plane. Also, as shown in fig. 9, the vision test user can perform the second confirmation operation while being able to see the image of the area where the 180 ° axis is located in the imaging plane but being unable to see the image of the area where the 90 ° axis is located in the imaging plane.

In fig. 8 and 9, lines with different thicknesses are used to illustrate whether the vision test user can clearly see the image in the imaging plane. The thicker lines indicate that the vision test user can clearly see the image of the area where the axis is located, and the thinner lines indicate that the vision test user cannot clearly see the image of the area where the axis is located.

The second confirmation operation may be a click operation, and the click operation may be an operation of clicking a confirmation key in the wearable display device. Alternatively, the second confirmation operation may be a voice operation, for example, the vision testing user uttering a "confirmation" voice.

Optionally, before the wearable display device receives the first confirmation operation performed by the vision test user, the wearable display device may play a second voice, and the second voice may prompt the vision test user to trigger a second confirmation operation when the vision test user can clearly see the image displayed in the second area in the imaging plane of the wearable display device.

For example, the second voice may be "if only a partial image can be seen when the confirmation key is clicked for the first time, please click the confirmation key for the second time when another partial image can be seen, and the other partial image is an image which cannot be seen clearly when the confirmation key is clicked for the first time".

Of course, wearable device also can need not to play the second pronunciation, and visual detection user can consult this description and confirm this wearable display device's operation flow before adopting this wearable display device to carry out visual detection promptly to independently carry out visual detection.

And 310, determining a second target distance between the imaging surface and the target plane when the second confirmation operation is received.

In this embodiment, when the wearable display device receives the second confirmation operation performed by the vision testing user, the wearable display device may determine the moving distance d4 that the imaging surface of the wearable display device moves relative to the initial position when the vision testing user performs the second confirmation operation.

The wearable display device can determine the moving distance d4 of the imaging plane relative to the initial position b according to the moving speed of the imaging plane and the moving time length t2 of the imaging plane. The movement time period t2 is the time period between the imaging surface starts to move and the second confirmation operation is received. The wearable display device can determine a second target distance d5 between the imaging plane and the target plane according to the moving distance d4 and the pre-stored distance d1 between the initial position and the target plane. Also, since the movement of the position of the image forming surface is controlled by the rotation of the motor, the movement time period may also refer to a running time period from the start of running of the motor to the reception of the second confirmation operation.

Referring to fig. 6, it is assumed that the wearable display apparatus is located at a position where the distance d4 from the initial position b of the imaging plane when receiving the second confirmation operation. When the wearable display device receives the second confirmation operation, the moving distance of the imaging surface 102 is d 4. The wearable display device first determines the moving speed v1 and the moving time length t2 of the imaging plane, and then the wearable display device may determine the product of the moving speed v1 and the moving time length t2 of the imaging plane as the moving distance d4, that is, the moving distance d4 satisfies: d4 ═ v1 × t 2.

And, the wearable display apparatus may determine a difference between the distance d1 between the initial position and the target plane and the second moving distance d4 as a second target distance d5 between the imaging plane and the target plane, that is, the second target distance d5 satisfies: d 5-d 1-d 4.

And 311, determining a second refractive power corresponding to the second target distance.

In this embodiment, after determining the second target distance, the wearable display device may determine a second refractive power corresponding to the second target distance according to a second pre-stored correspondence relationship between the distance and the refractive power.

For example, assuming that the wearable display device determines that the second target distance is 0.250m according to step 309, the wearable display device may determine that the second refractive power corresponding to the second target distance is 4D according to table 2.

And step 312, determining the astigmatic power of the vision detection user according to the first refractive power and the second refractive power.

In this embodiment, the wearable display device may determine the degree of astigmatism of the vision testing user according to the difference between the second refractive power determined in step 310 and the first refractive power determined in step 307. Alternatively, the wearable display device may determine the degree of astigmatism of the vision-detecting user as a product of the difference value and a prestored scale factor.

Assuming that the wearable display device determines that the first refractive power is 2D according to the step 307 and the second refractive power is 4D according to the step 311, the wearable display device may determine that the vision detection user has an astigmatism degree of (4-2) × 100 ═ 200 degrees.

On one hand, if the eyes of the vision testing user are simply near sighted, the first confirmation operation is performed when the vision testing user can see all images in the images displayed in the imaging surface of the wearable display device, that is, after the imaging surface of the wearable device continues to move towards the direction close to the target plane, the user does not perform the second confirmation operation any more. Further, if the user has not performed the second confirmation operation when the imaging surface of the wearable display device moves to the closest position relative to the target plane within the movement range of the wearable display device, the wearable display device may not need to perform the above steps 309 to 312.

At this time, the wearable display device may generate a corrective prescription for the vision testing user based on the first refractive power determined in step 307. The corrective prescription may be used to represent vision tests of the vision testing user, and the vision tests may include: the user's vision, and the degree of myopia of the eye. Wherein the wearable display device may add myopia identification based on the first refractive power to generate a corrective prescription, the myopia identification may include: sphere power (DS) and "-" number. The "-" sign before DS refers to myopia.

For example, if the wearable display device does not perform steps 309 to 312, the wearable display device may generate a corrective prescription according to the first refractive power 3D determined in step 307: -3.00 DS. The-3.00 DS is used to indicate that the user has a myopia of 3 × 100 to 300 degrees. And the myopia degree can be used for expressing the vision of the user, the larger the numerical value before DS is, the worse the vision of the vision detection user is, the smaller the numerical value before DS is, and the better the vision of the vision detection user is.

On the other hand, if the eye of the vision-detecting user is complex myopic astigmatism, the first confirmation operation is performed when the vision-detecting user cannot see all images in the image displayed in the imaging plane of the wearable display device, but can only see a partial image in the image displayed in the imaging plane, and thus the user can also perform the second confirmation operation after performing the first confirmation operation. That is, the wearable display device may perform steps 309 to 312 described above.

And, the wearable display device may generate a corrective prescription for the vision testing user based on the first refractive power determined in step 307 and the second refractive power determined in step 311. The correction prescription is used for expressing the vision test result of the vision test user. The vision test result may include: the user's vision, the myopic power of the eye, and the astigmatic power of the eye. And the direction of the axis of the image displayed on the imaging surface which can be seen clearly when the vision detection user performs the second confirmation operation can be determined as the astigmatic axis of the vision detection user.

Wherein the wearable display is capable of adding a myopia indication based on the first refractive power and an astigmatism indication based on the second refractive power to generate a corrective prescription. The astigmatism identification may include: cylinder Degrees (DC) and the "-" sign. The "-" sign before the DC refers to astigmatism.

For example, if the wearable display device performs the above steps 309 to 312, the wearable display device may generate the corrective prescription according to the first refractive power 2D determined in the above step 307, the second refractive power 4D determined in the above step 311, and the axis direction 180 ° in the image displayed on the imaging surface that can be seen by the vision test user when performing the second confirmation operation: 2.00DS-2.00DC × 180 deg. Where-2.00 DS is used to indicate that the user has a degree of myopia of 2 x 100 to 200 degrees. -2.00DC is used to indicate that the degree of astigmatism of the user is 2 x 100 ═ 200 degrees. And the-2.00 DS can also be used to represent the user's vision.

180 degrees is the astigmatism axis of the vision detection user.

It should be noted that, after the wearable display device completes the vision test, the wearable display device may play a third voice, where the third voice is used to indicate a vision test result of the vision test user, and the vision test result may include: at least one of a user's vision, a degree of myopia of the eye, and a degree of astigmatism of the eye. For example, the third voice may be "your vision is 4.7, the myopic power is 200 degrees, and the astigmatic power is 200 degrees".

It should be further noted that, the order of the steps of the vision testing method provided in the embodiment of the present application may be appropriately adjusted, and the steps may also be correspondingly increased or decreased according to the situation. For example, step 307 may be performed before step 306, and steps 307 to 312 may be deleted as the case may be. Any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application is covered by the protection scope of the present application, and thus the detailed description thereof is omitted.

In the embodiment of the present application, before the wearable display device is used for vision detection, the first corresponding relationship between the distance and the vision needs to be determined. The wearable display device may also determine a first correspondence of distance to vision from the sample user's vision and the sample distance. Referring to fig. 10, the method may include:

step 401, in the process of adjusting the position of the imaging surface of the wearable display device, receiving a third confirmation operation performed by the sample user.

In the embodiment of the application, a plurality of sample users with different eyesight can be selected in advance, each sample user wears the wearable display device, and an image displayed on an imaging surface of the wearable display device is checked to determine a sample distance of each sample user in the plurality of sample users, so that the wearable display device determines the first corresponding relationship according to the eyesight and the sample distance of the plurality of sample users.

In the process that the wearable display device adjusts the position of the imaging surface of the wearable display device, the sample user can see that the image displayed by the imaging surface is changed into clear by blurring. When the sample user can clearly see the image displayed on the imaging surface of the wearable display device, a third confirmation operation may be triggered. At this time, the wearable display device may receive a third confirmation operation performed by the sample user.

Optionally, the third confirmation operation may be a click operation, and the click operation may be an operation of clicking a preset key (a confirmation key in the wearable display device). Alternatively, the third confirmation operation may be a voice operation, for example, the sample user speaks a "confirmation" voice, which is not limited in this embodiment of the present application.

It should be noted that, in step 401, reference may be made to the process of step 303, and details of the embodiment of the present application are not described herein again.

Step 402, determining the sample distance between the imaging surface and the target plane when the third confirmation operation is received.

In this embodiment of the application, when the wearable display device receives a third confirmation operation performed by the sample user, the wearable display device may determine a sample distance between an imaging surface and the target plane when the sample user performs the third confirmation operation. Wherein the target plane is a plane where eyes of a user wearing the wearable display device are located. That is, the sample distance is a distance between an imaging plane of the wearable display device and an eye of a sample user.

It should be noted that, in step 402, reference may be made to step 304 and step 305, which is not described herein again in this embodiment of the application.

Step 403, determining a first corresponding relationship according to the vision of the sample user and the sample distance.

In this embodiment of the application, the wearable display device may pre-store the eyesight of the sample user, and after the wearable display device determines the sample distance of the sample user, the first corresponding relationship between the distance and the eyesight may be determined according to the sample distance and the pre-stored eyesight of the sample user.

It should be noted that the pre-stored vision of the sample user in the wearable display device is the accurate vision of the sample user, for example, the vision of the sample user may be detected by a physician. And, the vision of each of the plurality of sample users may be pre-stored in the wearable display device, wherein the range of the vision of all the sample users may be 3.8 to 5.3, and each vision in the range of the vision may select a plurality of sample users to perform the sample distance test.

In summary, the embodiment of the present application provides a vision testing method, which may receive a first confirmation operation performed by a vision testing user in a process of adjusting a position of an imaging plane of a wearable display device, determine a first target distance between the imaging plane and a target plane, and finally determine a target vision corresponding to the first target distance as a vision of the vision testing user according to a first corresponding relationship between the distance and the vision. The vision detection method provided by the embodiment of the application can be used for automatically completing vision detection by a vision detection user without the assistance of a doctor, and the vision detection efficiency is higher. And the process of vision detection is not limited by areas, and the flexibility is higher.

Fig. 11 is a schematic view of a vision testing apparatus according to an embodiment of the present application. The vision inspection apparatus can be applied to the wearable display device 10 shown in fig. 2. Referring to fig. 11, the vision inspection apparatus may include:

the first receiving module 501 is configured to receive a first confirmation operation performed by a vision testing user in a process of adjusting a position of an imaging plane of the wearable display device.

A first determining module 502, configured to determine a first target distance between the imaging plane and a target plane when the first confirmation operation is received, where the target plane is a plane where eyes of a user wearing the wearable display device are located.

The second determining module 503 is configured to determine, according to the first corresponding relationship between the distance and the eyesight, a target eyesight corresponding to the first target distance as the eyesight of the eyesight test user.

Alternatively, referring to fig. 12, the vision inspection apparatus may further include:

and the control module 504 is used for responding to the vision detection instruction and moving the imaging surface from the initial position in the direction close to the target direction.

Optionally, referring to fig. 13, the first determining module 502 may include:

the first determination sub-module 5021 is used to determine the movement distance that the imaging surface moves relative to the initial position when the first confirmation operation is received.

The second determining sub-module 5022 is configured to determine a first target distance between the imaging plane and the target plane according to the moving distance and the distance between the initial position and the target plane.

Optionally, the first determining submodule 5021 may be configured to determine a moving distance of the imaging plane relative to the initial position according to a moving speed of the imaging plane and a moving time period of the imaging plane. Wherein the moving time length is a time length from the beginning of the movement of the imaging surface to the receipt of the first confirmation operation.

Alternatively, referring to fig. 12, the vision inspection apparatus may further include: the reset module 505 is configured to control the imaging plane to move to the initial position in response to a reset command.

Alternatively, referring to fig. 12, the vision inspection apparatus may further include: the playing module 506 is configured to play a first voice, where the first voice is used to instruct a vision testing user to trigger the first confirmation operation when at least an image displayed in the first area of the imaging plane can be seen clearly.

a third determining module 507, configured to determine a first refractive power corresponding to the first target distance.

A fourth determining module 508, configured to determine the myopia degree of the vision testing user according to the first refractive power.

Alternatively, referring to fig. 12, the vision inspection apparatus may further include: a second receiving module 509, configured to receive a second confirmation operation performed by the vision testing user in a process of adjusting a position of an imaging plane of the wearable display device.

A fifth determining module 510, configured to determine a second target distance between the imaging plane and the target plane when the second confirmation operation is received.

A sixth determining module 511, configured to determine a second refractive power corresponding to the second target distance.

A seventh determining module 512, configured to determine an astigmatic power of the vision detecting user according to the first refractive power and the second refractive power.

Optionally, the third determining module 507 is configured to determine the first refractive power corresponding to the first target distance according to the second corresponding relationship between the distance and the refractive power.

A sixth determining module 511, configured to determine, according to the second corresponding relationship, a second refractive power corresponding to the second target distance.

Optionally, the seventh determining module 512 is configured to determine a difference between the second refractive power and the first refractive power, and determine the astigmatic power of the vision testing user according to the difference.

Optionally, the playing module 506 is further configured to play the second voice. The second voice is used for indicating the vision detection user to trigger the second confirmation operation when the vision detection user can clearly see the image displayed in the second area of the imaging surface.

Alternatively, referring to fig. 14, the vision inspection apparatus may further include:

an eighth determining module 513, configured to receive a third confirmation operation performed by the sample user in the process of adjusting the position of the imaging plane of the wearable display device.

A ninth determining module 514, configured to determine a sample distance between the imaging plane and the target plane when the third confirming operation is received.

A tenth determining module 515, configured to determine the first corresponding relationship according to the eyesight of the sample user and the sample distance.

To sum up, the embodiment of the present application provides a vision test apparatus, which can receive a first confirmation operation performed by a vision test user in a process of adjusting a position of an imaging plane of a wearable display device, determine a first target distance between the imaging plane and a target plane, and finally determine a target vision corresponding to the first target distance as the vision of the vision test user according to a first corresponding relationship between the distance and the vision. The vision detection device that this application embodiment provided need not under doctor's assistance, can independently accomplish vision detection by the vision detection user, and vision detection's efficiency is higher. And the process of vision detection is not limited by areas, and the flexibility is higher.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, modules and sub-modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

Fig. 15 is a schematic diagram of another wearable display device provided in an embodiment of the present application. As can be seen with reference to fig. 15, the wearable display device 60 may include: a processor 601 and a memory 602. The memory 602 may be used to store instructions executed by the processor 601, and the processor 601 may implement the vision detection method provided by the above-mentioned embodiments by executing the instructions stored in the memory 602, for example, the method shown in fig. 3 or fig. 4 may be implemented.

The embodiment of the present application provides a computer-readable storage medium, in which operations are stored, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the vision detection method provided by the above method embodiment, for example, the method shown in fig. 3 or fig. 4 may be implemented.

Embodiments of the present application further provide a computer program product including instructions, which, when the computer program product runs on the computer, cause the computer to execute the method for starting the application program provided in the foregoing method embodiments, for example, the method shown in fig. 3 or fig. 4 may be implemented.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by operating the relevant hardware by a program, where the program is stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A vision detection method is applied to a wearable display device, and comprises the following steps:

2. The method of claim 1, wherein the adjusting the position of the imaging plane of the wearable display device comprises:

3. The method of claim 1, wherein the determining the first target distance of the imaging plane from the target plane upon receiving the first confirmation operation comprises:

4. The method of claim 3, wherein the determining a movement distance that the imaging surface moves relative to the initial position upon receiving the first confirmation operation comprises:

5. The method of any of claims 2 to 4, wherein prior to adjusting the position of the imaging plane of the wearable display device, the method further comprises:

6. The method of any of claims 1 to 4, wherein prior to the first confirmation operation performed by the receiving vision testing user, the method further comprises:

and playing first voice, wherein the first voice is used for indicating a vision detection user to trigger the first confirmation operation when the image displayed in the first area in the imaging plane can be seen clearly.

7. The method of any of claims 1 to 4, wherein after said determining the first target distance of the imaging plane from the target plane at the time of receiving the first confirmation operation, the method further comprises:

8. The method of claim 7, wherein after the determining the first target distance of the imaging plane from the target plane at the time the first confirmation operation is received, the method further comprises:

9. The method of claim 8, wherein determining the first optical power corresponding to the first target distance comprises:

10. The method of claim 8 or 9, wherein said determining the degree of astigmatism of the vision testing user as a function of the first and second refractive powers comprises:

11. The method of claim 8 or 9, wherein prior to receiving the first confirmation operation performed by the vision testing user, the method further comprises:

12. The method of any of claims 1 to 4, further comprising:

13. A vision testing apparatus applied to a wearable display device, the apparatus comprising:

14. A wearable display device, comprising: a processor and a memory, the memory for storing instructions for execution by the processor, the processor implementing the vision testing method of any of claims 1-12 by executing the instructions stored in the memory.

15. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the vision detection method of any one of claims 1 to 12.