WO1992018050A1

WO1992018050A1 - Nystagmograph

Info

Publication number: WO1992018050A1
Application number: PCT/JP1992/000462
Authority: WO
Inventors: Takao Kanbe
Original assignee: Itoh, Shinsuke
Priority date: 1991-04-13
Filing date: 1992-04-13
Publication date: 1992-10-29
Also published as: AU1581092A

Abstract

A nystagmograph for judging whether chronic dizziness has resulted from cerebral disease or from internal ear disease by quantitatively identifying nystagmus to cause pupils to oscillate in various directions. The nystagmograph (1) is provided with: a case (2) disposed along a visual axis connecting respective visual lines of the inspector and subject to each other; a translucent reflecting mirror (7) arranged slantwise with respect to the visual axis in the case and separating a bright place on the side of the subject from a dark one on the side of the inspector; visual means (3) of enlarging an image on an eyeball of the subject and introducing said image to the field of view of the inspector; and a window of non-reflecting coated glass (6) for guiding an image with a fixed index to the side of the subject through the translucent reflecting mirror (7). Hence, the inspector observes the movement of pupils of the subject, inspects gaze nystagmus for judging central disease while opening the smoke glass (10) of the case (2), and, with the smoke glass (10) closed, inspects non-gaze nystagmus for judging peripheral disease.

Description

Specification

Eye shake measurement device

Technical field

The present invention makes it possible to easily determine whether permanent dizziness is caused by, for example, a brain disease or an inner ear vestibular disease, by using a semi-transmissive reflector, thereby facilitating eye shaking in which the pupil vibrates in various directions. The present invention relates to a nystagmus measuring device capable of measuring accurately.

Background art

Eyeball equilibrium function tests include a gaze test and a non-gaze test. The gaze function is indispensable for reading characters and performing fine manual operations.When examining the gaze function by moving the gaze to the front, right, left, up and down, it is difficult to maintain gaze within 30 ° from the median. If it is, it is pathological, and it is diagnosed whether the target can be clearly seen or not. 2 If nystagmus (that is, pupil vibration) is observed, its direction, presence or absence of rotation element, frequency and It is necessary to check the amplitude and the like. On the other hand, there are three different states in the "state where objects cannot be watched": closed eyes, occluded eyes, and open eyes in the dark, and it is not possible to examine how the eyeball balances in these different states. is important. The ocular muscles receive a fairly strong tonic input from the vestibule, cerebellum or cerebrum, etc., but when the above-mentioned gaze function is working, the balance of the eyeball cannot be measured sufficiently. In addition, when inspecting the eyeball balance in a non-gaze state, conventionally, Frenzel glasses in which an illuminating device is mounted on a thick convex lens have been used. Frenzel glasses, designed by Frenzel, are medical devices that have been said to be indispensable for observing spontaneous nystagmus (ie, nystagmus in a non-gaze state). The subject wearing the spectacles is in a non-gaze state in which the object is completely blurred and cannot be seen because of the convex lens, while the examiner can observe the nystagmus of the eyeball image magnified by the convex lens. Inspection is performed in a room that is somewhat dark, with the gaze direction at the center.

However, in this type of eye shaking test using Frenz X-glasses, when performing a gaze state test after a non-gaze state test, the subject removes the Frenzel glasses and uses the examiner's finger as an index. It is necessary to watch carefully. For this reason, when trying to inspect the gaze state and the non-gaze state alternately, the inspection efficiency is reduced by the time required for putting on and taking off the glasses. Poorly, when wearing Frenzell glasses, the pupil is enlarged to, for example, about 1.5 times according to the magnification of the convex lens. As observed in 1, there was a problem that it was difficult to make a uniform evaluation because the magnification of the eyeball varied depending on the purpose of the examination. Therefore, it can be said that such an examination using the Frentzl's eye is practically applicable only to the measurement of spontaneous eye shaking during non-gaze, and that the measurement accuracy is a rough one with a poor quantitative basis. Never

—On the other hand, there is a method of measuring eye shaking using an electric nystagmograph called ENG (electronystagnograph), which uses a more expensive device than the above-mentioned Frenzel glasses to improve the measurement accuracy. Electric nystagmus measures nystagmus using the fact that there are eleven resting potentials along the anterior-posterior axis of the eyeball, and the electric field of the tissue surrounding the eyeball changes when the eyeball moves left or right or up and down. This has the advantage that the inspection can be performed only by bonding electrodes around the eyes of the subject.

However, this type of electric nystagmus is more susceptible to the measurement environment as it reacts to the magnetism of the wristwatch or the nearby AC outlet, and is particularly sensitive to disturbance magnetic fields such as geomagnetism. Therefore, the only way to ensure accuracy was to perform inspections in a magnetically shielded room that shuts out magnetic noise, which was very expensive. For this reason, it is not easy for general practitioners to have an electric nystagmus or magnetic shielding room, and it is not easy to use them. It is necessary to place a shielding plate in front of the subject's eyes to block the line of sight, and this must be done by the examiner himself.Furthermore, the potential generated between the electrodes adhered around the eyes and the displacement of the eyeball There were problems such as the need to perform the inspection again if the platform had a different relationship before and after the inspection.

Disclosure of the invention

An object of the present invention is to provide a nystagmus measuring instrument which solves the technical problems of the above-mentioned conventional example.

The configuration of the present invention for that purpose is based on a view connecting each line of sight of the subject (41) and the examiner (42). A case (2) provided along the axis, and the case (2) is disposed so as to be inclined with respect to the visual axis of the case, and a light place on the examinee (41) side and an examiner (42) side The semi-transmissive reflector (7), which classifies the subject into a dark place, and an image of a predetermined index (36, 41a) when the subject is in the injection state. An index providing and blocking means (2b) for providing the image to the field of view of the subject through the interface, and blocking the image of the index so as not to reach the field of view of the subject when the subject is out of sight. The present invention relates to an nystagmus measuring device.

A second configuration of the present invention includes a case (2) provided along a visual axis connecting each line of sight of the subject (41) and the examiner (42); A semi-transparent reflecting mirror (7), which is arranged at an angle and divides the inside of the case into a light place on the subject (41) side and a dark place on the examiner (42) side; In the gaze state, the image of the predetermined index (36, 41a) is provided to the field of view of the subject through the semi-transmissive reflector (7). In the non-gaze state, the image of the index is displayed. An index providing and blocking means (2b) for blocking and preventing the subject from reaching the field of view, and an eyeball image of the subject mounted on a case and transmitted through the transflective mirror to a dark place side The present invention relates to a nystagmus measuring instrument characterized by comprising eyeball image magnifying and viewing means (3) for enlarging an eyeball and bringing it to the field of view of the examiner.

The invention's effect

According to the configuration of the present invention, there are the following advantages.

① By placing the transflective mirror at an angle between the subject and the examiner, light from the subject on the light side with respect to the transflective mirror passes through the transflector and passes through the dark place. (In other words, the examiner can observe the eyeball image of the examiner), but the light from the examiner is reflected by the semi-transmissive reflector and does not reach the subject (ie, the subject The presence of the examiner is not visible.)

For this reason, the image of the index to the subject is blocked by the provision and blocking means of the index, so that the subject is in a non-gaze state without being conscious of the examiner's line of sight. By observing the nystagmus in a non-gaze state, it is possible to determine peripherality, that is, disease from the inner ear vestibule.

In addition, by providing the image of the index to the subject, the subject is in a gazing state in which the subject gazes at one point of the index, so that the examiner observes the nystagmus of the subject in a good gazing state. , Central So-called brain disease can be determined.

In any case, by using the transflective mirror, the gaze state and the non-gaze state can be switched very easily, and a nystagmus test with simple, quick, and high determination accuracy can be performed. .

② In addition, since the subject's eyeballs can be observed at the same magnification during the gazing nystagmus test and the non-gazing nystagmus test, it is very convenient compared to those that observe at different magnifications, such as Frentzl glasses. is there.

(3) Since eye movements are measured by a purely optical method, higher judgment accuracy can be obtained without being affected by electromagnetic noise or the like as in the ENG method.

④ Therefore, examinations can be easily performed at private clinics even if they are not specialists, and the range of applications can be expanded.

しかも In addition, the gaze nystagmus test and the non-gaze nystagmus test can both be performed at a specified magnification using the eyeball image magnifying means, and the judgment accuracy of the inspection work is further improved.

構成 The configuration in which the indicator providing and blocking means is a light shielding plate is extremely simple and inexpensive.

動き The movement of the eyeball of the subject can be accurately read in accordance with the scale line of the major filter, making it possible to make a disease judgment supported by quantitative measurement results.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of an embodiment of the nystagmus measuring device according to the present invention,

FIG. 2 is a side view of the nystagmus measuring device shown in FIG. 1,

Fig. 3 is a front view of the nystagmus measuring device shown in Fig. 1 as viewed from the examiner's side.

FIG. 4 is a front view of the nystagmus measuring device shown in FIG. 1 as viewed from the examiner,

FIG. 5 is a bottom view of the nystagmus measuring device shown in FIG. 1,

FIG. 6 is a side sectional view of the nystagmus measuring apparatus shown in FIG. 1,

FIG. 7 is a diagram showing an eyeball image transmitted through an example of the major filter shown in FIG. 6, FIG. 8 is a diagram showing a boundary drawn on the major filter shown in FIG. 7, and FIG. FIG. 7 is a view showing an eyeball image transmitted through a major filter different from that shown in FIG.

Fig. 10 shows the relationship between the scale line of the major filter shown in Fig. 9 and the rotation distance of the eyeball. A diagram showing a person in charge,

FIG. 11 is a plan view showing a schematic configuration of a pupil distance adjusting means,

Fig. 12 is a side view showing the structure of the vertical adjustment screw part for the subject shown in Fig. 11, and Fig. 13 is the structure of the horizontal adjustment screw part for the subject viewed from the subject side. FIG. 14 is a side view of the subject horizontal adjustment screw portion shown in FIG.

Fig. 15 is a front view of the structure of the horizontal adjustment screw for the examiner as viewed from the examiner.

FIG. 16 is a diagram showing a pupil distance adjustment pattern,

Fig. 17 is a side view for explaining an example of the use of a nystagmus measuring instrument in a gaze nystagmus test.

FIG. 18 is a side view for explaining another example of an inspection method of the nystagmus measuring device in the gaze nystagmus test.

Fig. 19 is a side view for explaining an example of the use of a nystagmus measuring instrument in a non-gaze nystagmus test.

FIG. 20 is a side view for explaining another example of the use of the nystagmus measuring device in the gaze nystagmus test.

BEST MODE FOR CARRYING OUT THE INVENTION

In FIGS. 1 to 7, an eye tracing device 1 magnifies an eyeball of a subject on a mirror case 2 large enough to cover both eyes of the subject; ^ The binoculars 3 are combined. The mirror case 2 has an eyepiece window 2a for a subject at the front, which is surrounded by a hood 4, and an opening, and a lighting window 2b for taking in external light opens at the lower surface. Non-reflective coated glass 5 and 6 are fitted into each opening. In mirror case 2, a bright place on the subject side and a dark place on the examiner side are divided to heat ray reflective glass or magic mirror. A semi-transmissive mirror (half mirror) 7 is arranged at an inclination of approximately 45 degrees, and when viewed through from the side, the above two non-reflective coating glasses 5, 6 are the same triangle as a right-angle prism. The shape is formed. When the semi-transmissive reflecting mirror 7 is arranged at 45 degrees above, light from the light place side with respect to the mirror 7 is transmitted to the opposite dark place side, but on the contrary, faint light from the dark place side is also reflected. To the light side Has a function that does not let you. That is, the bright place side can be seen from the dark place side via the mirror 7, but conversely, the dark place side cannot be seen from the bright place side.

As shown in FIG. 19, a pair of left and right side surfaces of the mirror case 2 are provided for illuminating the eyes of the subject 41 when the light in the mirror case 2 is darkened by smoke glass 10 described later. The measurement light 8 is arranged with a part bulging outward. In addition, a light switch 9 for switching between turning on or off the measuring light 8 and turning on or off the tuning light 8 is provided immediately adjacent to the measuring light 8. Synchronous lighting refers to lighting performed in synchronization with the opening / closing operation of the smoked glass 10 described later.

The binoculars 3 are incorporated in a scope case 13 (see FIG. 6) in a scope outer case 12 which is connected to the mirror case 2 via a mirror case attachment 11, and the transflective mirror 7 is mounted on the mirror case 2. The eyeball image of the subject transmitted to the dark place side is enlarged. As shown in FIG. 6, a sponge spacer 14 for buffering an externally applied shock is packed between the scope outer case 12 and the scope case 13. On the lower surface of the scove outer case 12, a smoke glass holder 15 provided as a light-shielding plate for accommodating the above-mentioned smoke glass 10 so that it can be freely taken in and out is formed. The smoked glass 10 can be moved forward or backward by rotating the smoked glass lever 16 provided on the side surface of the smoked glass holder 15, and is non-reflective when advanced from within the smoked glass holder 15. The light enters the lower surface of the coating glass 6, whereby the lighting window 2b is shielded, so that the subject is not watched as described later. The smoked glass 10 transmits some light to illuminate the eyeball of the subject somewhat, but is not limited to this, and may completely block light. Both ends of the scope outer case 12 and the smoked glass holder 15 are connected to an eyepiece hood 18 via an elastic zone 17 made of bellows rubber.

In the scope case 13, two objective lenses 19, 20 and a major filter 21 are incorporated in the large-diameter portion on the objective side, and two eyepieces 2 2 are installed in an eyepiece hood 18. 23 built in, these make up a binocular short-range telescope You. In FIG. 2, reference numeral 22a denotes an adjustment ring provided at the base of the eyepiece hood 18.

The major filter 21 is interposed between the two objective lenses 19 and 20, and functions to display a scale line indicating a pupil displacement on an eyeball image of the subject to be viewed in an enlarged manner. In the embodiment, as shown in FIG. 7 and FIG. 8, the transparent filter plate has an upper viewing area 21 a.a square viewing area 2 lb, a lower viewing area 21 c, a left viewing area 21 d, and a right viewing area. A boundary line indicating each moving range of the pupil associated with the visual region 21e, and a vertical scale line and a horizontal scale line from which the moving distance can be read in mm are used. The hexagonal outer frame is sized to accommodate the pupil of the subject. In addition, upward vision. Square vision, downward vision. Left vision and right vision are distinguished by the center of the pupil in any of the five areas 21a to 21e shown in Fig. 8. can do. In addition, the subject's pupil is magnified at the magnification of the binoculars 3, and the enlarged image of the pupil overlaps the scale line of the major filter 21 to be double-photographed. Can be clearly read according to the scale line.

It should be noted that since the above-described major filter 21 measures the movement of the eyeball of the subject as a planar movement, it cannot be said that the movement of the eyeball that rotates is accurately captured accurately. Therefore, the major filter 24 shown in FIG. 9 is obtained by changing the scale line to a scale line indicating the pupil rotation distance. In this example, the horizontal axis has graduation lines at unequal intervals, and the rotation distance of the eyeball can be read directly from this graduation line. When the eyeball is moved by lmm from the median to the circumferential distance, the relationship between the distance P „-Ρ η-, between the n-th and n-th projection points projected on the horizontal axis The person in charge can be determined geometrically based on the figure shown in FIG.

P n— P n— ^ Dsin (1 / D) cos (2n-l / D)

Given by However, D is the pupil diameter, and a value of about 24 mm is usually used for ordinary adults. Pn is a projection point of the median point T. Although it was mentioned earlier that the ability to hold the gaze within 30 ° from the midline in the gaze function test in the gaze state is a criterion for judging whether the patient is healthy or ill, the use of a major filter 24 did this. Strict angle judgment that is the basis of gaze nystagmus test is possible By the way, the distance between the left and right eyeballs or the height from the hill to the eyeball is usually different depending on the subject, and therefore, the nystagmus measuring instrument 1 uses the center of the left and right eyeball images of the subject. Adjusting means for aligning the center of the pupil of the examiner is provided. Here, as shown in FIG. 11, such an adjustment means adjusts the objective lenses 19 and 20 up and down according to the height of the subject from the condyles to both eyes. The vertical adjustment screw 25 for the subject, the horizontal adjustment screw 26 for the subject that adjusts the distance between the left and right objective lenses 19, 20 according to the distance between the eyes of the subject, and the left and right An adjuster screw 27 for the examiner is provided to adjust the center of the left and right eyepiece lenses 2 2 and 23 to the center of the pupil, and by adjusting these adjustment screws 25 and 26.27 appropriately, accurate Care should be taken so that inspections can be conducted at the same time.

The subject's vertical adjustment screw 25 passes through the middle between the left and right objective lenses 19 and 20 (see Fig. 6) as shown in Fig. 12, and the lower end is the inner bottom of the scope outer case 12 The pupil distance adjusting rod 28, which supports the left and right objective lenses 19, 20 from below, is screwed through. For this reason, by turning the adjusting screw 25 clockwise or in the opposite direction, the pupil distance adjusting rod 28 is moved up and down to the height of both eyes from the recruitment hill of the subject. In addition, the vertical height of the objective lenses 19 and 20 can be adjusted.

Also, as shown in FIGS. 13 and 14, the crown gear 26 a of the subject horizontal adjustment screw 26 is engaged with the pinion 30 in the gear box 29, and this pinion 3 0 is connected to a pair of racks 3 1. 32 connected to the left and right scope cases 13. Therefore, by rotating the adjusting screw 26 clockwise or in the opposite direction, the pinion 30 is driven to rotate forward and reverse, and the racks 31 and 32 are displaced in a direction away from or close to each other. Thus, the distance between the left and right objective lenses 19 and 20 can be adjusted according to the distance between the eyes of the subject. Since the racks 3 1 and 3 2 are connected to the scope case 13 via hinges 3 la and 3 2 a, respectively, even if the racks 3 1 and 3 2 move in the horizontal direction, the objective lens 1 9 , 20 are not twisted.

Furthermore, the examiner's leveling screw 27 (see Fig. 3 and Fig. 5) is shown in Fig. 15 As shown, the pinion 27a at the tip is connected to the pair of racks 34, 35 in the gearbox 33. The racks 34 and 35 are connected near the ends of the left and right scope cases 13 via hinges 34 a and 35 a, respectively. For this reason, by rotating the adjusting screw 27 clockwise or in the opposite direction, the racks 34 and 35 are displaced in a direction away from each other or in a direction close to each other. The distance between the eyepieces 22, 23 can be adjusted.

The spacing adjustment patterns between the objective lenses 19 and 20 and the eyepieces 22 and 23 are basically classified into the three types shown in FIGS. 16 (A), (B) and (C). First, while increasing the distance between the left and right objective lenses 19.20, the pattern that reduces the distance between the left and right eyepieces 22.23, and second, while decreasing the distance between the left and right objective lenses 19,20, The third pattern is to increase the distance between the left and right eyepieces 22 and 23, and the third is to increase or decrease the distance between both the left and right objective lenses 19 and 20 and the left and right eyepieces 22 and 23. Any of these patterns can be easily selected by operating the horizontal adjustment screws 26 and 27 for the subject and the examiner.

Next, the operation of the eye tracing measurement device will be described. As described above, there are two types of tests for nystagmus: a gazing nystagmus test and a non-gazing nystagmus test.In each case, as shown in FIGS. The examiner 41 and the examiner 42 face each other with the nystagmus measuring instrument 1 interposed therebetween, and the examinee 41 looks at the lighting window 2a, and the examiner 42 looks at the eyepieces 22, 23. First, in the gaze nystagmus test, the examiner operates the smoked glass lever 16 to hold the smoked glass 10 (see FIG. 6) in the smoked glass holder 15, that is, the lower surface of the non-reflective coating glass 6 is opened. State.

Then, the subject 41 extends his / her palm 41 a directly below the lighting window 2 a in accordance with the instructions of the examiner 42. The light from the palm 41 a reaches the subject 41 via the optical path connecting the non-reflective coating glass 6, the transflective mirror 7 and the non-reflective coating glass 5, whereby the subject 41 turns the palm 41 a Watch carefully. At this time, since the subject 41 and the examiner 42 are divided into the light place and the dark place with the transflective mirror 7 as a boundary, the subject 41 cannot see the examiner 42 and Only fall palms You can arrive and watch. On the other hand, the examiner 42 can also observe the pupil of the subject 41. Therefore, the examiner can accurately read the movement of the pupil of the subject observed through the transflector 7 according to the scale line of the major filter 21 or 24.

At this time, as shown in FIG. 18, the pen light 36 held by the examiner 42 was moved back and forth, right and left, and turned, instead of the palm of the examinee 41 1. Alternatively, eye movement can be measured from the movement of the pupil of the subject 41 following the penlight 36.

Next, as shown in FIG. 19, the examiner operates the smoked glass lever 16 to advance the smoked glass 10 from the smoked glass holder 15 to shield the lower surface of the non-reflective coating glass 6. As a result, the light place on the subject 41 side is switched to a dark place, so that the light switch 9 is switched to the ON side to turn on the measurement light 8. The reason why the measurement light 8 is turned on is to illuminate the eyeball of the subject 41 so that the examiner 42 can see it. At this time, since the lighting window 2b below the mirror case 2 is covered with the smoked glass 10 and sealed, the subject 4 1 observes nothing in the sealed lighting space in the mirror case 2. You are placed in a non-gaze state, where you look dimly without watching. For this reason, the examiner 42 can closely observe the presence or absence of spontaneous nystagmus in the non-gaze state from the movement of the pupil of the subject 41 by the light transmitted through the transflective mirror 7.

In addition, the eye tracing measurement device 1 can freely switch between gaze nystagmus inspection and non-gaze eye inspection by one operation of the smoked glass lever 16. This makes it possible to measure nystagmus from various angles. At that time, if the light switch 9 is set to the tuning side (see Fig. 1 and Fig. 2), the measurement light 8 is automatically turned on when the smoked glass 10 blocks the lighting window 2b. This eliminates the need to switch ON / OFF switch 9.

Normally, if the subject's pupil swing is reduced during the gazing nystagmus test, and conversely, the subject's pupil swing is increased during the non-gazing nystagmus test, it is a peripheral neuropathy, It is necessary to suspect abnormalities such as the three-half organ and the inner ear vestibule. Contrary to this, if the subject's pupil swing is increased in the gaze nystagmus test and the pupil swing is reduced in the non-gaze nystagmus test, the patient may have a central nervous system disorder. Yes, it is necessary to suspect abnormalities such as the brain. Also, if the pupil swings greatly when viewed 30 degrees from the median, it is a central disease. '

In the above embodiment, as shown in FIG. 20, the nystagmus measuring instrument 1 can be used upside down, and in that case, external light from above is passed through the lighting window 2b. Can lead to the light.

Further, in the embodiment, the magnifying means combined with the mirror case 2 having the transflective mirror 7 incorporated therein is not limited to the binoculars 3, but may be a monocular configured with a set of an objective lens and an eyepiece. Good. Further, the magnifying means may not be necessarily provided, and the examiner 42 may simply observe the eyeball image of the naked subject at the magnification of 1.

In addition, an imaging means such as a video camera may be incorporated in place of such a short-range telescope, and the movement of the eyeball is performed by a still image processing or a moving image processing by a computer from image data obtained by capturing the movement of the eyeball of the subject. Can be automatically numerically analyzed-can also.

Further, the configuration of the smoked glass 10 and the lever 16 is not always necessary. That is, in this case, an electrically operated liquid crystal plate or the like is disposed in place of the coating glass 6 on the lighting window 2b in place of the coating glass 6, and the index is formed or extinguished by the liquid crystal, and the gaze and non-gaze states are set. May be made. Alternatively, a predetermined index may be simply taken in and out of the case at or near the lighting window 2b from the outside of the case.

Claims

The scope of the claims

1. A case (2) provided along the visual axis connecting each line of sight of the subject (41) and the examiner (42),

A semi-transmissive reflector that is arranged at an angle to the visual axis of the case and divides the inside of the case into a bright place on the examiner's (41) side and a dark place on the examiner's (42) side. When,

When the subject is in the gaze state, the image of the predetermined index (36, 41a) is provided to the subject's field of view through the transflective mirror (7). Provision of an index providing means and an interception means (2b) for intercepting the image so as not to be in the field of view of the subject,

An nystagmus measuring device characterized by the above.

2. A case (2) provided along the visual axis connecting each line of sight of the subject (41) and the examiner (42),

A semi-transmissive reflecting mirror which is disposed obliquely with respect to the visual axis of the case and divides the inside of the case into a bright place on the subject (41) side and a dark place on the examiner (42) side (7) When,

When the subject is in the gaze state, the image of the predetermined index (36, 41a) is provided to the subject's field of view through the transflective mirror (7). An indicator providing and blocking means (2b) for blocking an image so as not to be in the field of view of the subject; and an eyeball of the subject mounted on a case and passing through the transflective mirror to a dark place side. An eye movement measuring apparatus, comprising: an eyeball image magnifying means (3) for enlarging an image and guiding the image to the field of view of the examiner.

3. The eye tracing measurement device according to claim 1, wherein the index providing and blocking means (2b) is configured to pass an image of the index outside the case toward the transflective mirror inside the case. An apparatus for measuring nystagmus, comprising: a window (2b); and a translucent or totally light-shielding light-shielding plate (10) for opening and closing the window.

4. In the nystagmus measuring device according to claim 1 or 2, the means for providing and blocking the index (2b) is a means for creating an index image using a liquid crystal or the like provided in a case for creating and extinguishing the index. Characteristic eye shake measurement device.

5. The nystagmus measuring device according to claim 1 or 2, wherein the subject (41) is used instead of the subject (41). A nystagmus measuring device characterized in that an image pickup device is arranged by using the device.

6. The nystagmus measuring device according to claim 2, wherein the eyeball image magnifying means (3) is a monocular or binocular short-range telescope.

7. The nystagmus measuring device according to claim 2, wherein the eyeball image magnifying means (3) is an imaging device having an eyeball image magnification function.

8. The nystagmus measuring apparatus according to claim 2, wherein the magnifying means (3) includes: a boundary line indicating a moving range of a pupil associated with upward, square, downward, leftward, and rightward vision; A measure filter for displaying a scale line indicating a moving distance on the eyeball image of the subject.

(21) An apparatus for measuring nystagmus comprising:

9. The eye shake measurement device according to claim 2, wherein the magnifying means (3) displays a scale line indicating a pupil movement range as a pupil rotation distance or a displacement angle on the eyeball image of the subject. An eye torsion measuring device characterized by having a major filter (24) for superimposed display.

10. The nystagmus measuring instrument according to claim 6, wherein the binoculars (3) are a vertical adjustment screw for a subject, which vertically adjusts an objective lens according to a height of both eyes with respect to a nasal fold of the subject. (2 5), a horizontal adjustment screw (2 6) for the subject that adjusts the distance between the left and right objective lenses according to the distance between the eyes of the subject, and left and right center of the left and right pupils of the examiner An eye tracing measurement device characterized by having an examiner's horizontal adjustment screw (27) for adjusting the center of the eyepiece lens.

11. The nystagmus measuring device according to claim 1 or 2, wherein the case includes a measuring light (8) for illuminating the light place.

1 2. The nystagmus measuring device according to claim 3, wherein the case illuminates the light place in synchronization with opening and closing of the window (2b) by the light shielding plate (10), and closes the window. A dysphagia measuring device characterized by comprising a measuring light (8) that is lit at the moment.