KR102120643B1 - Measurement apparatus for resistance and power of eyeball movement - Google Patents

Abstract

The present invention relates to an eye movement resistance and force meter, and more particularly, to an eye movement force meter for measuring eye rotational force. A measuring device related to an example of the present invention includes: a contact unit performing at least one of an operation of rotating the eyeball while in contact with an eyeball surface and an operation of generating resistance to rotation of the eyeball; A handle portion that controls the operation of the contact portion; A first sensor disposed on at least one of the contact portion and the handle portion to sense first information related to the force of the eyeball; And a second sensor disposed on at least one of the contact portion and the handle portion to sense second information related to rotation of the eyeball.

Description

Eye movement resistance and force meter {MEASUREMENT APPARATUS FOR RESISTANCE AND POWER OF EYEBALL MOVEMENT}

The present invention relates to a mechanism for measuring the force associated with eye movement, and more particularly, to a mechanism for measuring the resistance of the eye and the force generated by the eye muscles.

The eye is an organ that collects visual information, converts it into electrochemical information, and transmits it to the brain through a pathway called the optic nerve. These eyeballs are stuck in the shape of a ball in the orbit inside the eye and rotate. In order to obtain the desired visual information, the ability of the eye to create an accurate optical image and convert it to an electrical signal is important, but it is also important that both eyes move in a harmonious and smooth manner in the desired direction. Because both eyes move in harmony, they cannot see a single target, and a deviation of the gaze occurs between the two eyes. Lives cause double vision with an unusual appearance. In particular, diplopia occurring in adults causes very severe discomfort and is regarded as the same disorder as blindness.

Some of the strabismus are caused by resistance to eye movement due to adhesions or build-up of tissues, or from weakened eye movement due to paralysis of the eye muscles or eye motor nerves. Therefore, measuring the resistance or force of eye movement often provides crucial information in the diagnosis and treatment of strabismus or diplopia. In addition, it is a technique that requires a great deal to understand and study physiology of eye movement diseases.

However, to date, techniques for measuring the force of the extraocular muscle and resistance to eye movement have remained at a primitive level. Currently, the method of measuring the resistance to eye movement is subjective to the resistance felt by the examiner's hand as the subject instructs the subject to see the direction in which the eye movement is restricted, and then the examiner grasps the limbal conjunctiva of the eye and turns the eye in the restricted direction It is evaluated as. The method of measuring the force of the extraocular muscle is subjectively evaluating the force felt by the forceps by instructing the subject to exercise the eye while holding the subject's limbal conjunctiva similar to the above.

Accordingly, the measurement results appear differently depending on the subjective feeling of the examiner, and it is difficult to carry out an accurate diagnosis and research on eye movement diseases because it is difficult to systematize numerically.

Korea Patent Office Application No. 10-2003-0036715

One embodiment of the present invention can exclude the subjective elements of the measurer and objectively measure and quantify the measurement of the force on the movement of the eye, so that the eye can help to conduct an accurate study of the movement of the eye It is to provide exercise resistance and force meter.

On the other hand, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. Will be understandable.

The measuring device related to an example of the present invention for realizing the above-mentioned subject performs at least one of an operation of rotating the eyeball by applying an external force while in contact with the surface of the eyeball or an operation of generating resistance to rotation of the eyeball A contact portion; A handle portion that controls the operation of the contact portion; A first sensor disposed on at least one of the contact portion and the handle portion to sense first information related to the force of the eyeball; And a second sensor disposed on at least one of the contact portion and the handle portion to sense second information related to rotation of the eyeball.

In addition, the first sensor is a load cell for measuring the force applied to the eyeball, and the second sensor may be a tilt sensor for measuring the rotation angle of the eyeball.

Further, the contact portion may be a suction cup that fixes and rotates the eye using vacuum pressure of an external device in contact with the eye surface.

In addition, the first sensor and the second sensor may be mounted on the handle portion.

In addition, the contact portion may be a forcep that fixes and rotates the eye using an external force of the user while in contact with the eye surface.

In addition, the first sensor is mounted on the handle, and when the second sensor is a tilt sensor for measuring the angle of rotation of the eyeball, it is mounted on the contact portion, and the second sensor is a camera that shoots the eyeball In this case, the measurement device may be mounted at a predetermined distance.

In addition, it is possible to calculate the rotational force of the eye using the first information and the second information, and the rotational force may be determined by Equation 1 below.

Equation 1

는 상기 안구의 회전력이고,

은 상기 제 1 센서가 측정한 상기 안구에 걸리는 힘이며,

는 핸들부의 전체 길이 중 외부에서 가해지는 외력 지점을 기준으로 접촉부를 향하는 길이를 의미하고,

는 핸들부의 전체 길이 중 상기

의 길이를 제외한 길이를 의미한다.
또한, 상기 안구에 걸리는 토크는 하기의 수학식 2에 의해 결정될 수 있다.In Equation 1 above

Is the rotational force of the eyeball,

Is the force applied to the eyeball measured by the first sensor,

Is the length toward the contact portion based on the external force point applied from the outside of the entire length of the handle portion,

Is the total length of the handle

It means the length excluding the length of.
Further, the torque applied to the eye may be determined by Equation 2 below.

delete

Equation 2

는 상기 안구에 걸리는 토크를 의미하고,

는 상기 안구의 반지름을 의미한다.In Equation 2 above

Means the torque applied to the eyeball,

Means the radius of the eyeball.

On the other hand, the measurement method related to another example of the present invention for realizing the above-described problems, at least one of the operation of rotating the eyeball while the contact portion is in contact with the surface of the eyeball and the operation of generating resistance to rotation of the eyeball The first step of performing; A second step in which the handle portion controls the operation of the contact portion; A third step in which a first sensor disposed on at least one of the contact portion and the handle portion senses first information related to the force of the eyeball; And a fourth step in which a second sensor disposed on at least one of the contact portion and the handle portion senses second information related to the rotation of the eyeball.

In addition, the first sensor is a load cell for measuring the force applied to the eyeball, and the second sensor may be a tilt sensor for measuring the rotation angle of the eyeball.

In addition, in the first step, the contact portion is a suction cap, and in contact with the surface of the eyeball, the eyeball can be fixed and rotated using a vacuum pressure of an external device.

In addition, in the first step, the contact part is a forcep, and in contact with the surface of the eyeball, the eyeball may be fixed and rotated using an external force of the user.

In addition, after the fourth step, a fifth step of calculating the rotational force of the eye using the first information and the second information; further comprising, in the fifth step, the rotational force is the following equation 1 It can be determined by.

Equation 1

는 상기 안구의 회전력이고,

은 상기 제 1 센서가 측정한 상기 안구에 걸리는 힘이며,

는 핸들부의 전체 길이 중 외부에서 가해지는 외력 지점을 기준으로 접촉부를 향하는 길이를 의미하고,

는 핸들부의 전체 길이 중 상기

의 길이를 제외한 길이를 의미한다.
핸들부의 전체 길이 중 상기 외력 지점을 기준으로 상기 접촉부의 반도를 향하는 길이를 의미한다.In Equation 1 above

Is the rotational force of the eyeball,

Is the force applied to the eyeball measured by the first sensor,

Is the length toward the contact portion based on the external force point applied from the outside of the entire length of the handle portion,

Is the total length of the handle

It means the length excluding the length of.
It means the length toward the peninsula of the contact portion based on the external force point of the entire length of the handle portion.

Further, the torque applied to the eye may be determined by Equation 2 below.

Equation 2

는 상기 안구에 걸리는 토크를 의미하고,

는 상기 안구의 반지름을 의미한다.In Equation 2 above

Means the torque applied to the eyeball,

Means the radius of the eyeball.

One embodiment of the present invention described above, by excluding the subjective elements of the measurer can objectively measure and quantify the resistance and power for eye movements, for accurate diagnosis of eye movement abnormalities and for eye movement It can help you conduct your research.

On the other hand, the effects that can be obtained in the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

The following drawings attached to the present specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, and therefore the present invention is limited to those described in those drawings. It should not be construed as limited.
1 is a view for explaining the importance of eye rotation, with respect to the present invention.
2 is a view for explaining a perspective of a disabled person related to eye rotation.
3A and 3B are diagrams for explaining a conventional eye rotation measurement technique in connection with the present invention.
Figure 4 shows an example of a conceptual diagram of an eye movement force meter proposed by the present invention.
5 is a detailed view of the hemisphere member added in FIG. 4 so that the contact portion and the handle portion can move along the same concentric radius as the eyeball.
FIG. 6 shows an example of a partial plan view of FIG. 4.
7A, 7B, and 7C are detailed views showing a front view, an enlarged view and a top view of a suction tube separated according to an embodiment of the present invention.
8 is a view for explaining the measurement principle of the eye movement and angle measuring device proposed by the present invention.
9 is a view showing an example of a conceptual diagram of an eye force measurement device according to an embodiment of the present invention.
10 is a view showing an example of an eye movement measuring apparatus using foceps according to another exemplary embodiment of the present invention.
11 is a view showing an example of an eye motion sensor using a Foceps and a Suction Cup together according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, one embodiment described below does not unduly limit the contents of the present invention as set forth in the claims, and the entire configuration described in this embodiment cannot be said to be essential as a solution to the present invention.

1 is a view for explaining the importance of eye rotation, with respect to the present invention.

Referring to FIG. 1, eye movement/rotation is an essential element to see what is desired.

That is, it is possible to acquire a single vision only when both eyes work together to move smoothly, and even if one of the two eyes has an eye movement disorder, double vision occurs.

When double vision occurs, one eye is considered the same disorder as blindness, and the patient complains of more discomfort than blindness.

Meanwhile, FIG. 2 is a diagram for explaining a perspective of a disabled person related to eye rotation.

Referring to Figure 2, the prevalence of strabismus (Strabismus) is about 3-4%, which means that the eyes are not aligned and imply visual impairment looking at different points.

In the case of children, one eye is not used without the user's knowledge and vision does not develop. As a result, the vision of the unused eye becomes permanently worsened.

In addition, stereoscopic vision may be lost, and includes a phenomenon in which the head is turned to the left or right or up or down or tilted to the side to overcome double vision.

Therefore, in order to prevent, measure, diagnose, and treat such eye movement-related disorders, a technique for measuring eye rotation is essential.

Measurement targets having clinical significance include rotational resistance of the eye, torque, rotational moment, and rotational range of the eye.

Measuring these factors means that they can be used as the most basic data for understanding, diagnosing and treating eye motor disorders.

3A and 3B are diagrams for explaining a conventional eye rotation measurement technique in connection with the present invention.

Referring to Figure 3a, it becomes a Forced Duction Test (Forced Towing Test).

The Forced Duction Test is a method of measuring rotational resistance/torque. As a manual technique, forceps are used.

This is the most commonly used method in clinical practice, and the force is turned to the eye while the eye is held by forceps.

At this time, you can roughly estimate the mechanical resistance with the resistance felt on your hand or subjectively judge the force felt on your hand after instructing the eye movement while holding the eyeball with forceps.

Also, referring to FIG. 3B, a measurement method using a tension gaze is illustrated, which is an experimental alternative for measuring an objective force.

However, it is rarely used in clinical practice due to the side of invasive and the point that the end point is not determined (how far will the tension be measured?).

Therefore, in this specification, the rotational resistance of the eye to free rotational force or external force is measured through a rotational resistance measurement method (contact type) using a load cell.

Hereinafter, an apparatus and method for measuring a rotational resistance force to free rotational power or external force of an eye based on a load cell proposed by the present invention will be described in detail.

Example 1-Suction Cup type

Referring to Figures 4 to 6, the eye movement force measuring device according to an embodiment of the present invention is provided with a suction groove portion 101 that can be contacted on the surface of the eye and is connected to the suction groove portion 101 and a suction pipe connected to a pneumatic line ( The suction part 100 provided with 102, the handle part 110 connected to the suction tube 102 so as to move the suction tube 102, is disposed in contact with the suction tube 102 and the handle part 110, and in the suction tube 102 It includes a sensor unit 120 for sensing the pressure applied.

The suction part 100 has a shape suitable for the convex round shape of the eyeball. The suction unit 100 is in close contact with the eyeball by a vacuum by the suction pipe 102 is connected to the vacuum pump 109 for suction, it can be moved with the eyeball by eye movement.

The suction part 100 is provided with a suction groove part 101 to be in close contact with the eyeball. The suction groove portion 101 may be provided as a sucker plate 105 having a round groove shape inside. The adsorption plate 105 is easily adhered, such as rubber or silicon, and may be made of a flexible material.

The handle unit 110 is to adjust the suction unit 100. The handle unit 110 is connected to the suction unit 100 on the outer side of the suction unit 100 to move the suction unit 100 in close contact with the eyeball or to fix the suction unit 100 against the movement of the suction unit 100 You can also

5 and 6, the handle unit 110 is a sensor unit 120, the load cells 122 are connected to the cylindrical inner wall 112 and the cylindrical tube 112, the hemispherical shape is connected to It may include a hemisphere member 115 having a. The cylindrical tube 112 can be moved by the hemisphere member 115. The hemisphere member 115 is provided in correspondence with the shape of the eyeball in front of the eyeball, and can move like an eyeball shape on the outer side of the eyeball shape.

On the other hand, between the suction unit 100 and the handle unit 110 is a sensor unit 120 that can measure the pressure applied to each other relative to each other. The sensor unit 120 is configured to measure pressure, and a plurality of sensor units 120 may be disposed outside the suction unit 100.

As described above, the sensor unit 120 according to an embodiment of the present invention may be provided as a load cell 122 disposed on all sides of the suction pipe 102. The load cell 122 is a piezoelectric element for measuring pressure. The load cell 122 is used to measure the pressure acting between the suction part 100 and the handle part 110.

The load cell 122 may be a compression-type load cell disposed in all directions of the suction pipe 102 or a compression-tension-type load cell disposed in two directions orthogonal to each other. A display unit for displaying pressure may be connected to the load cell 122.

The sensor unit 120 according to an embodiment of the present invention may include a tilt sensor 125 capable of detecting a tilt of the suction pipe 102. Tilt sensor 125 is disposed on the handle unit 110 is configured to measure the inclination of the suction pipe (102).

The tilt measurement value of the suction tube 102 by the tilt sensor 125 is used as a factor for accurate measurement of eye movement. The tilt sensor 125 is a sensor that can be additionally installed on the handle unit 110 in addition to the load cell 122.

The inclination value of the suction tube 102 by the tilt sensor 125 is used to measure the displacement of the suction tube 102. The displacement of the suction tube 102 is an element that can accurately measure the movement of the eyeball connected through the suction tube 102 together with the pressure value measured in the load cell 122.

7A, 7B, and 7C, a detailed structure of a suction unit according to an embodiment of the present invention is illustrated. In the suction part 100, the suction pipe 102 is detachably coupled.

In the suction part 100, a suction action surface 107 close to a right angle intersecting the air passage 106 around the suction groove part 101 is provided at the lower end. The inside of the suction action surface 107 is provided as a concave surface according to the shape of the eyeball.

The suction action surface 107 is spaced apart from the surface of the eyeball and forms an annular vacuum space 108 capable of applying vacuum pressure so that the suction plate 105 is positioned and fixed to the eyeball. The air passages 106 are connected to the annular vacuum space 108 at 90 degree intervals.

The lower end of the suction action surface 107 is provided with the suction groove portion 101 according to the eye shape.

8 is a view for explaining the measurement principle of the eye movement and angle measuring device proposed by the present invention.

Referring to Figure 8, the present invention is based on the Free-Body Diagram of the Probes, load cell reaction force, eye reaction force and the measurement of the eye movement and angle using an external force by the measurer.

이고, 안구반력은

이며, 측정자에 의한 외력은

이 된다.In Figure 8, the load cell reaction force is

And the eye reaction force

And the external force by the measurer

It becomes.

Accordingly, the eye reaction force may be determined according to Equation 1 below.

Equation 1

는 상기 안구의 회전력이고,

은 상기 제 1 센서가 측정한 상기 안구에 걸리는 힘이며,

는 핸들부의 전체 길이 중 외부에서 가해지는 외력 지점을 기준으로 접촉부를 향하는 길이를 의미하고,

는 핸들부의 전체 길이 중 상기

의 길이를 제외한 길이를 의미한다.In Equation 1 above

Is the rotational force of the eyeball,

Is the force applied to the eyeball measured by the first sensor,

Is the length toward the contact portion based on the external force point applied from the outside of the entire length of the handle portion,

Is the total length of the handle

It means the length excluding the length of.

Further, the torque of the eyeball may be determined according to Equation 2 below.

는 안구의 토크를 의하고,

는 안구의 반지름을 의미한다.In Equation 2

Is the torque of the eyeball,

Means the radius of the eyeball.

Equation 2

On the other hand, referring to Figure 9, the eye movement measurement device according to another embodiment of the present invention, the handle portion 210, the handle plate 210 is disposed inside the suction plate 222 and the suction plate 222 that can contact the eye surface ) And is located between the suction cup 220, the suction cup 220 and the handle portion 210 having a suction portion 223 capable of providing vacuum pressure for adsorption, and the suction cup 220 and the handle portion ( It is disposed in contact with 210, and includes a sensor unit 230 for sensing the pressure applied from the suction cup 220.

The suction part 223 is provided with a rubber tube 224 whose top is blocked and the bottom is opened to apply vacuum pressure. Between the suction portion 223 and the suction plate 222, a plastic tube 225 made of a rigid material may be positioned to transfer pressure from the suction plate 222 to the sensor portion 230.

The rubber tube 224 may be elastically restored in the compressed state, and apply vacuum pressure to the adsorption plate 222 through the plastic tube 225. Accordingly, the adsorption plate 222 is fixed to the eyeball.

The sensor unit 230 is configured to measure the pressure acting between the handle unit 210 and the plastic tube 225. The sensor unit 230 may include a piezoelectric element as described above, and may be provided as a linear displacement sensor.

The eye movement force measuring instrument according to another embodiment of the present invention is disposed outside the handle unit 210 and connected to the sensor unit 230, and may further include a display unit displaying the pressure measured by the sensor unit 230. have.

As the handle part 210 moves, the pressure for eye movement is sensed by the sensor part 230 and may be displayed on the display part. The display unit may be a liquid crystal with a microcomputer or a monitor connected to a computer.

In the ocular motion force measurement device according to another embodiment of the present invention, the suction plate 222 is fixed to the ocular surface by contact with the suction part 223, and the measurement pressure of the sensor part 230 according to the movement of the handle part 210 is measured. It is displayed on the display.

Example 2-Forceps type

Embodiment 2 according to the present invention is a method of performing eye fixation and traction using Focep 310, as described in FIG. 3A.

However, in this embodiment, the force applied to the eyeball is measured using the load cell 320, and the angle of rotation of the eyeball uses a sensor (not shown) adjacent to the load cell 320 in the probe or a method using an externally installed camera. do.

10 is a view showing an example of an eye movement measuring apparatus using foceps according to another exemplary embodiment of the present invention.

As shown in Figure 10 (a), the present invention also performs eye fixation and traction using Focep 310, but as shown in (b), the force applied to the eye using a load cell 320 in the probe Is measured, and the angle of rotation of the eye is measured using a sensor (not shown) adjacent to the load cell 320 or using an externally installed camera.

Further, as shown in (c), the roller 300 may be used separately to facilitate eye fixation and traction and sensing.

Extracting a value related to eye movement through the information obtained here is the same as that described on the basis of Equation 1 and Equation 2 described above, so a duplicate description is omitted for the sake of brevity.

Example 3-Forceps + Suction Cup type

In addition, in Example 3 according to the present invention, a Forceps + Suction Cup type device combining Example 1 and Example 2 may be applied.

That is, in Example 3, the Forceps 310 described in Example 2 is used as it is, but the Suction Cup described in Example 1, that is, the suction unit 100 is applied as it is.

However, in the third embodiment, the suction pipe 102 does not utilize the vacuum pump 109 for suction, and performs eye fixation and traction using the aforementioned Forceps 310, but the inclination sensor 410 is applied to the suction unit. It is attached to the eyeball.

11 is a view showing an example of an eye motion sensor using a Foceps and a Suction Cup together according to another embodiment of the present invention.

As illustrated in FIG. 11, rotation force measurement is performed by a load cell 320 connected to Forceps 310, and eye rotation measurement is performed through a tilt sensor 410 connected to a Suction Cup 100.

At this time, a vacuum pressure connection is not necessary to the Suction Cup 100, because only the sensor 410 needs to be attached according to the movement of the eye, so a large vacuum pressure is not required.

As such, the subjective factors of the measurer can be excluded and the force measurement for the movement of the eye can be objectively measured and quantified, thereby helping to conduct an accurate study of the eye movement.

As described above, an embodiment of the present invention has been described, but on the basis of this, a person having ordinary skill in the art may add, change, or change components within a scope not departing from the spirit of the present invention as set forth in the claims. The present invention may be variously modified and changed by deletion or addition, and it will also be included within the scope of the present invention.

Meanwhile, the present invention can also be embodied as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, and optical data storage devices. Includes. In addition, the computer readable recording medium is distributed over a networked computer system so that the computer readable code is stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention pertains.

In addition, the apparatus and method described above are not limited to the configuration and method of the above-described embodiments, and the above-described embodiments are selectively combined with all or part of each embodiment so that various modifications can be made. It may be configured.

Claims (15)

A contact unit performing at least one of an operation of rotating the eyeball while in contact with an eyeball surface and an operation of generating resistance against rotation of the eyeball;
A handle portion that controls the operation of the contact portion;
A first sensor disposed on at least one of the contact portion and the handle portion to sense first information related to the force of the eyeball; And
And a second sensor disposed on at least one of the contact portion and the handle portion to sense second information related to a range of motion of the eyeball.
According to claim 1,
The first sensor is a load cell for measuring the force applied to the eyeball,
The second sensor is a measuring device, characterized in that the tilt sensor for measuring the rotation angle of the eyeball.
According to claim 2,
The load cell is a measuring device characterized in that it is provided with four compression-type load cells or two compression-tension-type load cells for force measurement in four directions.
According to claim 1,
The contact unit is in contact with the surface of the eye, the measuring device characterized in that the suction cup cup for fixing and rotating the eye using a vacuum pressure generated by an external device.
The method of claim 4,
The first sensor and the second sensor is a measuring device, characterized in that mounted on the handle.
According to claim 1,
The contact unit is in contact with the surface of the eye, the measuring device characterized in that the forceps (forcep) for fixing and rotating the eye using the external force of the user.
The method of claim 4,
The first sensor is mounted on the handle portion,
When the second sensor is a tilt sensor for measuring the rotation angle of the eyeball, it is mounted on the contact portion,
When the second sensor is a camera for photographing the eyeball, the measuring device is mounted at a predetermined distance from the measuring device.
According to claim 1,
It is possible to calculate the rotational force of the eyeball using the first information and the second information,
The rotation force is a measuring device characterized in that it is determined by the following equation (1).
Equation 1

In Equation 1 above

Is the rotational force of the eyeball,

Is the force applied to the eyeball measured by the first sensor,

Is the length toward the first sensor based on the external force point applied from the outside by the handle portion of the entire length of the contact portion,

Is the total length of the contact

It means the length excluding the length of.
The method of claim 8,
The torque applied to the eyeball is determined by Equation 2 below.
Equation 2

In Equation 2 above

Means the torque applied to the eyeball,

Means the radius of the eyeball.
A first step of performing at least one of an operation of rotating the eyeball while the contact portion is in contact with the surface of the eyeball and an operation of generating resistance against rotation of the eyeball;
A second step in which the handle portion controls the operation of the contact portion;
A third step in which a first sensor disposed on at least one of the contact portion and the handle portion senses first information related to the force of the eyeball; And
And a fourth step in which a second sensor disposed on at least one of the contact portion and the handle portion senses second information related to rotation of the eyeball.
The method of claim 10,
The first sensor is a load cell for measuring the force applied to the eyeball,
The second sensor is a measuring method characterized in that the tilt sensor for measuring the rotation angle of the eyeball.
The method of claim 10,
In the first step, the contact portion is a suction cap, in a state in contact with the surface of the eye, the measuring method characterized in that the eye is fixed and rotated using a vacuum pressure of an external device.
The method of claim 10,
In the first step, the contact portion is a forceps, in a state in contact with the surface of the eye, the method of measuring and fixing the eye using an external force of the user.
The method of claim 10,
After the fourth step,
Further comprising; a fifth step of calculating the rotational force of the eye using the first information and the second information;
In the fifth step, the rotational force is determined by the following equation (1).
Equation 1

In Equation 1 above

Is the rotational force of the eyeball,

Is the force applied to the eyeball measured by the first sensor,

Is the length toward the contact portion based on the external force point applied from the outside of the entire length of the handle portion,

Is the total length of the handle

It means the length excluding the length of.
The method of claim 14,
The torque applied to the eyeball is determined by Equation 2 below.
Equation 2

In Equation 2 above

Means the torque applied to the eyeball,

Means the radius of the eyeball.

Images