JPH09234185A - Ophthalmological measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a testee to watch a fixed target, which is displayed to guide the visual line of the eyes to be tested in the measurement direction in an ophthalmological device for measuring the eyes to be tested. SOLUTION: An image output circuit provided inside an ophthalmological device reproduces an image signal which is stored beforehand in an image storage medium provided inside the ophthalmological device or an image signal which is stored in the image storage medium by photographing an object by a TV camera and storing it, as an image so as to output to a fixed target display part 6' and the fixed target display part 6' displays the image output by the image output circuit as the fixed target. The content of the image displayed as the fixed target is, for example, set to a content desired by a testee so that, if the testee is a baby or a little child, the possibility of the baby or the little child watching the fixed target is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic measuring apparatus for measuring the eye to be inspected, such as the refractive power and corneal shape of the eye to be inspected. , Technology to guide the subject to see.

[0002]

2. Description of the Related Art Conventionally, in this type of ophthalmic measuring apparatus, a fixation target is displayed in order to match the visual axis of the eye to be examined with the optical axis of a measuring optical system for measuring the eye to be examined. When the subject looks at the fixation target, the visual axis of the eye to be examined is guided in the measurement direction, and a highly accurate measurement result can be obtained.

As a method of displaying the fixation target, a slide in which a landscape, an illustration, etc. are photographed and developed is provided in the ophthalmologic measuring apparatus, and the slide is projected from behind by a lamp or the like. is there. Usually, the number of slides prepared in the ophthalmologic measuring apparatus is one, and at most two. When two types of slides are prepared, the slides to be projected are mechanically switched.

[0004]

However, in such an ophthalmologic measuring apparatus, when a so-called infant of about 0 to 3 years old is a subject, the subject (infant) can easily see the fixation target. In an extreme case, there was a situation in which they did not see the ophthalmic measurement device itself, and they did not see it.

Therefore, the measurer should take measures such as sticking a sticker on which a cartoon character or the like is drawn on the front of the ophthalmologic measuring device, or putting a doll, a mascot or the like behind the ophthalmic measuring device. Then, the infant was guiding him to look at the fixation target.

Nevertheless, it is not easy to measure infants and children, and even if the measurement can be performed, the accuracy of the obtained measurement result is often low.

In recent years, the importance of eye examination of infants has been emphasized, and how to easily perform measurement and how to obtain highly accurate measurement results are key points.

Therefore, an object of the present invention is to provide a technique for guiding an examinee to look at a fixation target in an ophthalmologic measuring apparatus for measuring an eye to be examined.

In particular, when the subject is an infant, by guiding the infant to look at the fixation target, the above-mentioned problems can be solved and highly accurate measurement results can be obtained. be able to.

[0010]

According to a first aspect of the present invention for achieving the above object, a measuring means for measuring an eye to be inspected and a visual axis of the eye to be inspected are measured by the measuring means. Fixation target display means for displaying a fixation target for guiding in a direction,
In an ophthalmologic measuring device provided with an observation means for observing the eye to be inspected, a voice for guiding the eye to be inspected so as to see the fixation target, a voice storage means for storing at least a voice signal, and There is provided an ophthalmologic measuring apparatus comprising: a sound reproducing unit that reproduces a sound signal stored in the sound storing unit as a sound, and a sound output unit that outputs the sound reproduced by the sound reproducing unit.

According to a second aspect of the present invention for achieving the above object, in the first aspect, the voice input means for inputting voice and taking in a voice signal, and the voice input means for taking in the voice signal. There is provided an ophthalmologic measuring apparatus, further comprising a recording means for storing a voice signal in the voice storing means.

According to the third aspect of the present invention for achieving the above object, the measuring means for measuring the eye to be inspected and the visual axis of the eye to be examined are guided in the measuring direction of the measuring means. In the ophthalmologic measuring device comprising a fixation target display means for displaying the fixation target and an observation means for observing the eye to be inspected, an image reproduction means for reproducing at least one kind of image signal as an image, The ophthalmologic measuring apparatus is characterized in that the fixation target display means displays the image reproduced by the image reproduction means as the fixation target.

In the third aspect, the image reproducing means can reduce or enlarge the size of the image.

According to a fourth aspect of the present invention for attaining the above object, in the third aspect, an image storage means for storing at least one type of image signal, and an image signal obtained by photographing a subject. There is provided an ophthalmologic measuring apparatus characterized by further comprising: an image capturing unit that captures the image capturing unit and a recording unit that stores the image signal captured by the image capturing unit in the image storage unit.

According to the present invention, the voice reproduction means reproduces the voice signal stored in the voice storage means as a voice, and the voice output means outputs the voice reproduced by the voice reproduction means. Here, since the voice storage means stores at least a voice for inducing the eye to look at the fixation target as a voice signal, if the voice signal is reproduced and output as a voice, Persons (especially infants)
Is more likely to see the fixation target.

When the voice input means and the sound recording means are further provided, the sound recording means can store the sound signal captured by the sound input means in the sound storage means.

According to the present invention, the fixation target display means displays the image reproduced by the image reproduction means as a fixation target.

When the image storage means, the photographing means, and the recording means are further provided, the recording means can store the image signal captured by the photographing means in the image storage means.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments in which the present invention is applied to a handheld ophthalmic measuring apparatus and carried out will be described below with reference to the drawings.

First, the first embodiment will be described with reference to FIGS.

FIG. 1 is a diagram showing a measurement optical system and a fixation optical system of the handheld ophthalmic measuring apparatus of the first embodiment, and FIG. 2 is a diagram showing an observation optical system of the apparatus.

In the figure, 1 is a light source for measurement, 2 is an eye to be examined, 3 is a measurement optical system, 4 is a light receiving section, 5 is a display monitor, 6 is a fixation target display section, 7 is a fixation optical system, and 8 is a fixation optical system. A microphone, 9 is a speaker, 10 is a TV camera, 11 is a microcomputer unit which is a substrate on which a microprocessor is mounted, and 12 is an operation unit.

The TV camera 10 is arranged in an observation optical system branched from the measurement optical system, and captures an image signal by photographing the anterior segment of the subject's eye 2 as a subject. Further, the display monitor 5 displays the image signal captured by the TV camera 10 as an image.

Therefore, on the display monitor 5, the TV camera 1
The image signal 0 captured by capturing the anterior segment of the subject's eye 2 is displayed as an image of the anterior segment of the subject's eye 2. Therefore, the measurer can see the display content of the display monitor 5 and The state of the anterior segment of the optometry 2 can be observed. Before the measurement, the measurer can change the magnification of the observation optical system so that the display content of the display monitor 5 is the anterior segment of the subject's eye 2.

On the other hand, the light from the measurement light source 1 is projected onto the eye 2 to be inspected, and the reflected light from the eye 2 to be inspected reaches the light receiving section 4 via the measurement optical system 3. The light receiving unit 4 converts the reflected light that has reached via the measurement optical system 3 into an electric signal and outputs the electric signal to the microprocessor.

The microprocessor performs a predetermined calculation on the electric signal output from the light receiving section 4,
The measurement result obtained by measuring the refractive power of the eye 2 to be inspected is acquired, and the acquired measurement result is displayed on the display monitor 5.

Thus, the measurer can know the measurement result by looking at the display contents on the display monitor 5.

The fixation target display section 6 displays a fixation target in which the visual axis of the subject's eye 2 and the optical axis of the measurement optical system 3 are aligned with each other.

The fixation target displayed by the fixation target display unit 6 reaches the eye 2 to be inspected through the fixation optical system 7, so that the examinee can fix the fixation target displayed by the fixation target display unit 6. You can see the mark.

As in the prior art, the fixation target display section 6 projects a slide, which is provided in the ophthalmologic measuring apparatus and which photographs and develops a landscape, an illustration, etc., from behind by a lamp or the like. Therefore, the fixation target is displayed.

When the examinee looks at the fixation target, the visual axis of the eye 2 to be examined is guided in the measurement direction, so that the accuracy of the measurement result can be increased.

As described above, when the subject is an infant, the infant does not readily see the fixation target displayed by the fixation target display unit 6 and further does not see the ophthalmologic measuring device itself. Therefore, there is a problem that the measurer cannot obtain a measured value at all, let alone a satisfactory measured result.

In the first embodiment, in order to solve this problem, the ophthalmologic measuring apparatus stores at least one type of voice signal in a voice storage unit, and a voice signal stored in the voice storage unit. Sound reproducing means for reproducing as a sound,
The audio reproduction means is provided with an audio output means for outputting the reproduced audio. Then, in particular, the voice storage means stores at least a voice as a voice signal that causes the subject to guide the subject to view the fixation target displayed by the fixation target display unit 6.

The first embodiment further comprises voice input means for inputting voice and taking in a voice signal, and recording means for storing the voice signal taken in by the voice input means in the voice storing means. I am trying.

Therefore, in the handheld ophthalmologic measuring apparatus of the first embodiment, as shown in FIGS. 1 and 2, an instruction to start / stop the operation of the recording means and a start of the operation of the voice reproducing means. An operation unit 12 is provided which is composed of switches for respectively accepting a stop / stop instruction and designation of an audio signal to be reproduced by the audio reproducing means. The operation unit 1
The position where 2 is provided is not limited to the position shown in FIGS. 1 and 2.

In the handheld ophthalmologic measuring apparatus according to the first embodiment, as shown in FIG. 1, a microphone 8 corresponding to the voice input means and a speaker 9 corresponding to the voice output means are provided. Has been. The positions where the microphone 8 and the speaker 9 are provided are
Although not limited to the position shown in FIG. 1, it is particularly preferable that the speaker 9 is provided at a position where sound is output toward the subject.

FIG. 3 is a block diagram of a block according to the features of the first embodiment.

In the figure, 20 is a voice input circuit, 21 is a voice storage medium, 22 is a voice output circuit, 30 is a recording switch, and 3 is a voice switch.
1 is a voice reproduction switch, 32 is a voice selection switch, 50
Is a microprocessor.

In FIG. 3, the voice input circuit 2
Although 0, the voice storage medium 21, and the voice output circuit 22 are mounted on the microcomputer unit 11 together with the microprocessor 50, they may be mounted on a board different from the microcomputer unit 11.

The voice storage medium 21 corresponds to the voice storage means. The voice input circuit 20 and the voice output circuit 22 perform their operations under the control of the microprocessor 50, thereby realizing the recording unit and the voice reproducing unit, respectively.

The recording switch 30 is used by the measurer to input an instruction to start / stop the operation of the voice input circuit 20, and when the measurer presses the record switch 30, a control signal indicating that effect is sent by a micro signal. Since it is output to the processor 50, the microprocessor 50 is
Control to start operation. The voice input circuit 20 is
When the operation is started, the voice input by the microphone 8 is converted into an audio signal (A / D conversion) and stored in the audio storage medium 21.

The measurer can stop the operation of the voice input circuit 20 by pressing the recording switch 30 again.

Further, the audio storage medium 21 can be made to previously store an audio signal prepared commonly for all ophthalmologic measuring apparatuses.

The voice reproduction switch 31 is used for the voice output circuit 2
2 is for the operator to input an instruction to start / stop the operation. When the operator presses the voice reproduction switch 31, a control signal indicating that is output to the microprocessor 50. Reference numeral 50 controls the audio output circuit 22 to start operating. When the operation is started, the sound output circuit 22 converts the sound signal stored in the sound storage medium 21 into sound (D / A conversion) and outputs it from the speaker 9.

The measurer can stop the voice reproduction operation by pressing the voice reproduction switch 31 again.

Further, in particular, when there are two or more kinds of audio signals stored in the audio storage medium 21, the measurer
By depressing the voice selection switch 32, a voice signal to be reproduced as a voice can be designated.

That is, the voice selection switch 32 is used by the measurer to input the designation of the voice signal to be reproduced as voice by the voice output circuit 22, and when the measurer presses the voice select switch 32, the fact is indicated. Is output to the microprocessor 50, the microprocessor 50 controls the audio output circuit 22 to sequentially switch the audio signals to be converted into audio each time the control signal is output.

Note that the microprocessor 50 does not control the audio output circuit 22 to start operating when the audio reproduction switch 31 is pressed (set to the ON state), and when the audio reproduction switch 31 is pressed, The sound output circuit 22 may be controlled to start operating at a predetermined timing when a measurement start switch (not shown) is pressed. At this time, the microprocessor 50 may be controlled to repeat the operation of the audio output circuit 22 each time the measurement result is acquired. In this case, the measurer can automatically output the sound from the speaker 9 at the time of measurement by simply pressing the voice reproduction switch 31. If not, it is possible to prevent the speaker 9 from outputting sound during measurement.

As described above, according to the first embodiment, the measurer can output the sound from the speaker 9 at the time of measurement, and in particular, the speaker 9 can fix the fixation target display section. It is possible to output a voice that guides the subject to view the fixation target displayed by 6.

Therefore, when the subject is an infant, the infant is more likely to see the fixation target displayed by the fixation target display unit 6 in accordance with the content represented by the voice output from the speaker 9. The measurer can obtain highly accurate measurement results.

It is effective that the voice output from the speaker 9 at the time of measurement is the voice of a cartoon character or the like that infants prefer.

In addition, when the subject is an infant, it is general that a close relative is accompanied, and the words spoken by the close relative are particularly likely to attract the infant's attention. Prior to the above, if the voice of the close relative input from the microphone 8 is recorded as a voice signal,
This is more effective because the voice output from the speaker 9 at the time of measurement can be the voice of a close relative.

When the subject is not an infant, it is not always necessary to output the voice from the speaker 9.

In the first embodiment, the voice storage medium 21 is a memory mounted in the microcomputer unit 11, but a mounting portion to which the voice storage medium 21 can be mounted is provided. In this case, an external storage medium such as a cassette tape can be used as the audio storage medium 21. Therefore, it is possible to use a cassette tape that stores audio signals by using another recording device or a commercially available cassette tape.

In addition, in the first embodiment, the fixation target display section 6 is further provided at the time of measurement, and further includes precautions for the subject.
It is also possible to cause the speaker 9 to output a voice other than the voice that guides the subject to view the fixation target displayed by.

Next, the second embodiment will be described with reference to FIGS.

FIG. 4 is a diagram showing a measurement optical system and a fixation optical system of the handheld ophthalmic measuring apparatus of the second embodiment, and FIG. 5 is a diagram showing an observation optical system of the apparatus.

In the figure, 1 is a light source for measurement, 2 is an eye to be inspected, 3 is a measurement optical system, 4 is a light receiving section, 5 is a display monitor, 6'is a fixation target display section, 7 is a fixation optical system, 10 Is a TV camera, 11 is a microcomputer unit which is a substrate on which a microprocessor is mounted, and 12 is an operation unit.

The TV camera 10 is arranged in the observation optical system branched from the measurement optical system, and captures an image signal by photographing the anterior segment of the subject's eye 2 as a subject. Further, the display monitor 5 displays the image signal captured by the TV camera 10 as an image.

Therefore, the TV monitor 1 is displayed on the display monitor 5.
The image signal 0 captured by capturing the anterior segment of the subject's eye 2 is displayed as an image of the anterior segment of the subject's eye 2. Therefore, the measurer can see the display content of the display monitor 5 and The state of the anterior segment of the optometry 2 can be observed. Before the measurement, the measurer can change the magnification of the observation optical system so that the display content of the display monitor 5 is the anterior segment of the subject's eye 2.

On the other hand, the light from the measurement light source 1 is projected onto the eye 2 to be inspected, and the reflected light from the eye 2 to be inspected reaches the light receiving section 4 via the measurement optical system 3. The light receiving unit 4 converts the reflected light that has reached via the measurement optical system 3 into an electric signal and outputs the electric signal to the microprocessor.

The microprocessor performs a predetermined calculation on the electric signal output from the light receiving section 4,
The measurement result obtained by measuring the refractive power of the eye 2 to be inspected is acquired, and the acquired measurement result is displayed on the display monitor 5.

Thus, the measurer can know the measurement result by looking at the display contents on the display monitor 5.

In the above-described first embodiment, the fixation target display unit 6 is provided in the ophthalmologic measuring apparatus, and the slide developed and photographed the scenery or the illustration is provided in the first embodiment as described above. Since the fixation target is displayed by projecting from behind with a lamp or the like, the fixation target is
The content is common to all subjects.

When the subject is an infant, the possibility of attracting attention is low even if such a fixation target is shown. Therefore, in the second embodiment, at least one type of ophthalmic measurement device is used. Image storage means for storing the image signal of No. 1 and image reproduction means for reproducing the image signal stored in the image storage means as an image, and the fixation target display unit 6 ′.
However, it is characterized in that the image reproduced by the image reproducing means is displayed as a fixation target.

Here, the fixation target display section 6'may be structured to have a small and thin display device such as a liquid crystal display monitor or a viewfinder.

The second embodiment is further provided with a photographing means for photographing the subject and taking in the image signal, and a recording means for storing the image signal fetched by the photographing means in the image storing means. ing.

However, in this embodiment, the TV camera 10
The TV camera 10 is used as the photographing means by utilizing the fact that the display monitor 5 corresponds to the observation means described above. That is, the TV camera 10
Is further provided with a recording means for storing an image signal, which is obtained by photographing a subject other than the eye 2 to be inspected, in the image storage means.

Therefore, in the handheld ophthalmologic measuring apparatus of the second embodiment, as shown in FIGS. 4 and 5, an instruction to start / stop the operation of the recording means and an operation of the image reproducing means are started. An operation unit 12 is provided which is composed of switches for respectively accepting / stopping instructions and designation of image signals to be reproduced by the image reproducing means. The operation unit 1
The position where 2 is provided is not limited to the position shown in FIGS. 4 and 5.

FIG. 6 is a block diagram of a block according to the features of the second embodiment.

In the figure, 40 is an image input circuit, 41 is an image storage medium, 42 is an image output circuit, 33 is a recording switch, and 3 is a recording switch.
4 is an image reproduction switch, 35 is an image selection switch, 50
Is a microprocessor.

In FIG. 6, the image input circuit 4
Although 0, the image storage medium 41, and the image output circuit 42 are mounted on the microcomputer unit 11 together with the microprocessor 50, they may be mounted on a board different from the microcomputer unit 11.

The image storage medium 41 corresponds to the image storage means. Further, the image input circuit 40 and the image output circuit 42 realize their recording means and image reproducing means, respectively, by performing their operations under the control of the microprocessor 50.

The recording switch 33 is used by the measurer to input an instruction to start / stop the operation of the image input circuit 40. When the measurer presses the record switch 33, a control signal indicating that effect is sent by a micro signal. Since it is output to the processor 50, the microprocessor 50 is
Control to start operation. The image input circuit 40 is
When the operation starts, the image signal captured and captured by the TV camera 10 is stored in the image storage medium 41. Where T
When the image signal captured by the V camera 10 is an analog signal, the image input circuit 40 performs A / D conversion.

The measurer can stop the operation of the image input circuit 40 by pressing the recording switch 33 again.

Further, the image storage medium 41 can be made to store in advance an image signal prepared commonly for all ophthalmologic measuring devices.

The image reproduction switch 34 is used for the image output circuit 4
2 is for inputting an instruction to start / stop the operation by the measurer. When the measurer presses the image reproduction switch 34, a control signal indicating that is output to the microprocessor 50. Reference numeral 50 controls the image output circuit 42 to start operation. When the operation is started, the image output circuit 42 converts the image signal stored in the image storage medium 41 into an image (D / A conversion) and outputs the image to the fixation target display unit 6 ′. The fixation target display unit 6 ′ displays the image output from the image output circuit 42 as a fixation target.

The measurer can stop the operation of the image output circuit 42 by pressing the image reproduction switch 34 again.

Further, in particular, when there are two or more types of image signals stored in the image storage medium 41, the measurer
By pressing the image selection switch 35, an image signal to be reproduced as an image can be designated.

That is, the image selection switch 35 is used by the measurer to input the designation of the image signal to be reproduced as an image by the image output circuit 42. When the measurer presses the image select switch 35, the effect is input. Is output to the microprocessor 50, the microprocessor 50 controls the image output circuit 42 to sequentially switch the image signals to be converted into images each time the control signal is output.

As described above, according to the second embodiment, at the time of measurement, the measurer displays the image prepared in advance by the fixation target display section 6'or the recorded image as the fixation target. You will be able to.

The image displayed by the fixation target display unit 6'as the fixation target reaches the eye 2 to be inspected through the fixation optical system 7, so that the examinee displays the fixation target display unit 6 '. The image displayed as the fixation target can be seen.

When the subject looks at the fixation target, the visual axis of the subject's eye 2 is guided in the measuring direction, so that the accuracy of the measurement result can be increased.

In particular, when the subject is an infant, the infant can project a fixation target (a landscape, an illustration, etc., taken and developed, which has been displayed by the prior art, from the rear thereof. Compared with the displayed fixation target), the possibility of seeing the image displayed as the fixation target by the fixation target display unit 6'is higher, and thus the measurer can obtain a highly accurate measurement result. .

Note that the fixation target display section 6'needs to display an image as a fixation target for all subjects at the time of measurement, but this image is displayed when the subject is not an infant. Although it may be an image such as a landscape or an illustration, when the subject is an infant, it is effective to use an image of a cartoon character or the like that the infant likes.

In addition, when the subject is an infant, it is general that a close relative is accompanied, and the face of the close relative is particularly likely to attract the infant's attention. In advance, if the image signal captured by capturing the face of the close relative with the TV camera 10 is recorded, the image displayed by the fixation target display unit 6'as the fixation target is displayed as the face image of the close relative. It is even more effective as it can be.

Further, in the fixation target displayed in the prior art (fixation target displayed by projecting a slide developed by photographing and developing a landscape or an illustration from the rear), the slide is projected from the rear. However, the second embodiment does not use the lamp, and therefore such a problem does not occur.

By the way, in the second embodiment, the image displayed as the fixation target by the fixation target display unit 6'may be a still image or a moving image. In order to attract the attention of infants, it is considered more effective to display animations or other moving images. In this case, in order to improve the accuracy of measurement results, pause the currently displayed movie during measurement. It is preferable to do so.

Further, in the second embodiment, an image signal obtained by taking the logical sum of two or more types of image signals can be reproduced as an image.

That is, the image output circuit 42 takes the logical sum of two or more types of image signals stored in the image storage medium 41, D / A converts the resulting image signal into an image, and displays the fixation target. It is also possible to output to the section 6 '.

In this case, the image output circuit 42
Since there are two or more types of image signals to be converted into images, the image selection switch 35 needs to have a structure capable of designating a plurality of image signals at once, such as a ten-key pad. At this time, if the corresponding relationship between each key of the numeric keypad and the image signal is displayed on the display monitor 5, the operability is improved.

Further, in this case, as shown in FIG. 7, it is necessary that the operation unit 12 further includes an image mix switch 36 for inputting an instruction to take a logical sum by the measurer. There is.

Further, in the second embodiment, the size of the image displayed as the fixation target can be enlarged or reduced. That is, the image output circuit 42
However, the size of the image signal stored in the image storage medium 41 may be enlarged or reduced, and the resulting image signal may be converted into an image and output to the fixation target display unit 6 ′.

In this case, as shown in FIG. 7, it is necessary for the operation unit 12 to further include an image size change switch 37 for the measurer to input an image size change instruction. .

Generally, in an ophthalmologic measuring apparatus in which the measurement content is the refractive power of the eye 2 to be inspected, the fixation target is moved back and forth with respect to the eye 2 to give the eye 2 a sense of perspective. It is designed to perform "cloud operation".

Conventionally, in an ophthalmologic measuring apparatus, a fog optical system for showing the fixation target to the eye to be inspected and a drive mechanism including a motor for moving the fixation target in the front-rear direction are provided. By the preliminary measurement before the actual measurement, the fixation target is moved to the focus position according to the refractive power of the eye to be inspected, and just before the start of the actual measurement, a fixed amount called the fog amount is moved from the focus position to the blurred direction. By moving the fixation target, a fog operation is performed. It should be noted that the measurer performs the measurement several times for each eye to be inspected, but before each measurement, the measurer adjusts the amount of fog according to the immediately preceding measurement value.

Therefore, in the second embodiment, the size of the image displayed as the fixation target is gradually increased or reduced to give a perspective to the eye 2 to be inspected to perform the fog operation. It is possible to obtain the same result as when.
In order to give a sense of perspective to the eye 2 to be inspected, particularly when reducing the size of the image, image processing such as thinning out pixels forming the image or softening the outline is performed to blur the image. It is preferable to do so.

Thus, in the second embodiment,
By gradually enlarging or reducing the size of the image displayed as the fixation target, the drive mechanism, which was necessary in the conventional ophthalmologic measuring device, can be simplified and only the amount of fog can be fixed. There is an effect that the operator does not need to perform the operation of moving the target.

Further, in the second embodiment, the image input circuit 40 stores the image signal captured by the TV camera 10 by photographing the subject other than the eye 2 to be inspected, in the image storage medium 41.
However, a TV camera different from the TV camera 10 that captures an object other than the eye 2 to be inspected and captures it as an image signal may be provided. At this time,
The image input circuit 40 stores the image signal captured by another TV camera in the image storage medium 41.

Further, in the second embodiment, the image storage medium 41 is the memory mounted in the microcomputer unit 11, but a mounting portion to which the image storage medium 41 can be mounted is provided. In case of CD-RO
An external storage medium such as M or a video tape is used as the image storage medium 4
It can also be used as 1. Therefore, it is possible to use a video tape in which an image signal is stored by using another recording device, a commercially available CD-ROM or a video tape.

Next, the third embodiment will be described with reference to FIGS. 8 and 9.

The diagram showing the measurement optical system and the fixation optical system of the handheld ophthalmic measuring apparatus of the third embodiment is shown in the figure, and the measuring optical system of the handheld ophthalmic measuring apparatus of the first embodiment shown in FIG. And the view showing the fixation optical system, and the view showing the measurement optical system and the fixation optical system of the handheld ophthalmologic measuring apparatus of the first embodiment shown in FIG.
Omitted.

However, in the third embodiment, not the fixation target display unit 6 but the fixation target display unit 6'is provided.

The diagram showing the observation optical system of the handheld ophthalmic measuring apparatus of the third embodiment is a diagram showing the observation optical system of the handheld ophthalmic measuring apparatus of the first embodiment shown in FIG. , And the observation optical system of the handheld ophthalmic measurement apparatus of the second embodiment shown in FIG.
Omitted.

As described above, the display monitor 5 has a TV
The image signal captured by the camera 10 capturing the anterior segment of the subject's eye 2 is displayed as an image of the anterior segment of the subject's eye 2, so that the measurer can see the display content of the display monitor 5,
The state of the anterior segment of the subject's eye 2 can be observed.

Further, as described above, the light from the measurement light source 1 is projected onto the eye 2 to be inspected, and the reflected light from the eye 2 to be inspected reaches the light receiving section 4 via the measurement optical system 3. Light receiving part 4
Converts the reflected light that has reached via the measurement optical system 3 into an electric signal and outputs the electric signal to the microprocessor.

The microprocessor, as described above,
Since the measurement result of measuring the refractive power of the subject's eye 2 is acquired by performing a predetermined calculation on the electric signal output from the light receiving unit 4, and the acquired measurement result is displayed on the display monitor 5, the measurer The measurement result can be known by looking at the display contents of the display monitor 5.

The third embodiment has the features of both the first and second embodiments described above.

FIG. 8 is a block diagram showing the features of the third embodiment.

In the figure, 20 is a voice input circuit, 21 is a voice storage medium, 22 is a voice output circuit, 30 is a recording switch, and 3 is a voice switch.
1 is a voice reproduction switch, 32 is a voice selection switch, 33
Is a recording switch, 34 is an image reproduction switch, 35 is an image selection switch, 36 is an image mix switch, 37 is an image size change switch, 40 is an image input circuit, 41 is an image storage medium, 42 is an image output circuit, and 50 is a micro. It is a processor.

In FIG. 8, the voice input circuit 2
0, the voice storage medium 21, the voice output circuit 22, the image input circuit 40, the image storage medium 41, and the image output circuit 42 are mounted on the microcomputer unit 11 together with the microprocessor 50. May be mounted on another substrate.

As with the first embodiment described above, the voice storage medium 21 corresponds to the voice storage means, and the voice input circuit 20 and the voice output circuit 22 operate under the control of the microprocessor 50. By performing the above, the recording means and the voice reproducing means are respectively realized.

Further, similarly to the second embodiment described above,
The image storage medium 41 corresponds to the image storage means, and the image input circuit 40 and the image output circuit 42 are
By performing the operation under the control of the microprocessor 50, the recording means and the image reproducing means are respectively realized.

Further, similarly to the above-mentioned first embodiment,
The recording switch 30 starts / stops the operation of the voice input circuit 20.
The voice reproduction switch 31 is used for the operator to input a stop instruction. The voice reproduction switch 31 starts / stops the operation of the voice output circuit 22.
The measurement person inputs a stop instruction, and the voice selection switch 32 is used by the measurement person to input a designation of a voice signal to be reproduced as voice by the voice output circuit 22.

Further, as in the second embodiment described above,
The recording switch 33 starts / stops the operation of the image input circuit 40.
This is for the operator to input a stop instruction, and the image reproduction switch 34 starts / stops the operation of the image output circuit 42.
The image selection switch 35 is for the measurement person to input a stop instruction, and the image selection switch 35 is for the measurement person to input the designation of the image signal to be reproduced as an image by the image output circuit 42. 36 is an image output circuit 4
2 is for the measurer to input an instruction to take the logical sum of two or more types of image signals, and the image size change switch 37 is an instruction for the image output circuit 22 to change the size of the image signal. Is for the measurer to input.

The operation of these blocks is as described above.

Therefore, according to the third embodiment, the measurer can display an image prepared in advance in the fixation target display section 6'or a recorded image as the fixation target at the time of measurement. Like

Further, according to the third embodiment, the measurer can output the sound from the speaker 9 during the measurement, and in particular, the fixation target display section 6'is displayed from the speaker 9. It is possible to output a voice that guides the examinee to see the fixed target (image).

The image displayed by the fixation target display unit 6'as the fixation target reaches the eye 2 to be inspected through the fixation optical system 7, so that the examinee displays the fixation target display unit 6 '. The image displayed as the fixation target can be seen.

When the examinee looks at the fixation target, the visual axis of the eye 2 to be examined is guided in the measuring direction, so that the accuracy of the measurement result can be improved.

Note that the measurer can set the content of the sound output from the speaker 9 to a content suitable for the subject, and depending on the subject, the sound may not be output from the speaker 9. Good.

Therefore, especially when the subject is an infant, the fixation target display section 6'displays images of cartoon characters or the like preferred by the infant and the face of a close relative recorded prior to the measurement. If the image of is displayed as a fixation target and the voice of a cartoon character or the like that infants prefer, or the voice of a close relative recorded prior to measurement is output from the speaker 9, Since the possibility that the image displayed by the fixation target display unit 6'as the fixation target is seen increases,
The measurer can obtain highly accurate measurement results.

By the way, in the third embodiment, both the fixation target display section 6 and the fixation target display section 6'may be provided.

Here, as in the prior art, the fixation target display section 6 projects a slide, which is provided in the ophthalmologic measuring apparatus and which has taken and developed a landscape, an illustration, etc., from behind by a lamp or the like. By doing so, the fixation target is displayed.

In this case, as shown in FIG. 9, the operation unit 12 measures whether the fixation target display unit 6 or the fixation target display unit 6'displays the fixation target. It is necessary to further include the fixation target changeover switch 38 for input by the person.

Further, in this case, one of the fixation target display unit 6 and the fixation target display unit 6'designated by the fixation target switching switch 38 is the fixation target display unit 6 or the fixation target display unit 6 '. The fixation target displayed by the fixation target display unit 6 ′ is moved to a position where it reaches the eye 2 to be inspected, or the fixation target display unit 6 or the fixation target displayed by the fixation target display unit 6 is moved. It is necessary for the fixation optical system 7 to adjust the arrival path so that the eye reaches the subject's eye 2.

With this, the measurer can display the fixation target on either the fixation target display unit 6 or the fixation target display unit 6'according to the subject at the time of measurement. When a fixation target (image) is displayed on the target display unit 6 ′, further,
It is possible to display an image having contents according to the subject.

Further, also in the third embodiment, as in the case of the first embodiment described above, in the case where the mounting portion capable of mounting the audio storage medium 21 is provided, an external storage medium such as a cassette tape is provided. Can also be used as the audio storage medium 21, and like the second embodiment described above, in the case where a mounting portion to which the image storage medium 41 can be mounted is provided, a CD-ROM or a video can be used. It is also possible to use an external storage medium such as a tape as the image storage medium 41.

Since the CD-ROM and the video tape can actually store the image signal and the audio signal at the same time, in particular, in the third embodiment, the audio output circuit 22 and the image output circuit 42. If a sound / image output circuit that performs both of these operations is provided instead of the above, the sound signal and the image signal stored in the CD-ROM or the video tape can be reproduced at the same time. . Further, instead of the voice input circuit 20 and the image input circuit 40, a voice / voice that performs both of these operations.
If the image input circuit is provided, it is possible to store the sound and the image simultaneously captured and input in the video tape as the sound signal and the image signal, respectively.

As described above, according to any of the first to third embodiments described above,
Guide the fixation target displayed by the fixation target display unit 6 or the fixation target display unit 6'to match the visual axis of the eye 2 and the optical axis of the measurement optical system 3 so that the examinee can see the fixation target. As a result, the visual axis of the eye 2 to be examined is guided in the measurement direction, and the accuracy of the measurement result can be increased.

Therefore, particularly when the subject is an infant, the infant is more likely to see the fixation target, which facilitates the ophthalmic measurement of the infant and obtains a highly accurate measurement result. become able to.

Although all the above-described embodiments have been described with reference to the embodiments in which the present invention is applied to a hand-held type ophthalmic measuring device for measuring eye refractive power, the stationary type ophthalmic measuring device is used. The same applies to the embodiment when applied to a device, and when applied to an ophthalmologic measuring device for measuring corneal shape (may be handheld or stationary). The embodiment is also the same.

[0133]

As described above, according to the present invention,
In an ophthalmologic measuring device that measures the eye to be inspected, the fixation target displayed to guide the visual axis of the eye to be measured in the measurement direction, it becomes possible to guide the subject to see, so the accuracy of the measurement result Is improved.

In particular, when the subject is an infant, the ophthalmic measurement of the infant can be facilitated and highly accurate measurement results can be obtained, so that the measurement time can be shortened and it is useful for finding an abnormality. The effect can be expected.

[Brief description of drawings]

FIG. 1 is a top view of a handheld ophthalmologic measuring apparatus according to a first embodiment.

FIG. 2 is a side view of the handheld ophthalmologic measuring apparatus according to the first embodiment.

FIG. 3 is a block diagram of a block according to the features of the first embodiment.

FIG. 4 is a top view of the handheld ophthalmologic measuring apparatus according to the second embodiment.

FIG. 5 is a side view of the handheld ophthalmologic measuring apparatus according to the second embodiment.

FIG. 6 is a block diagram of a block according to the features of the second embodiment.

FIG. 7 is a block diagram of another block according to the features of the second embodiment.

FIG. 8 is a block diagram of a block according to the features of the third embodiment.

FIG. 9 is a block diagram of another block according to the features of the third embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source for measurement, 2 ... Eye to be examined, 3 ... Measurement optical system, 4 ... Light receiving part, 5 ... Display monitor, 6 and 6 '... Fixation target display part, 7 ...
Fixation optical system, 8 ... Microphone, 9 ... Speaker, 10
... TV camera, 11 ... Microcomputer unit, 12 ... Operation part, 20 ... Voice input circuit, 21 ... Voice storage medium, 22 ...
Audio output circuit, 30 ... Recording switch, 31 ... Audio reproduction switch, 32 ... Audio selection switch, 33 ... Recording switch, 34 ... Image reproduction switch, 35 ... Image selection switch, 36 ... Image mix switch, 37 ... Image size change switch , 38 ... fixation target changeover switch, 40 ... image input circuit, 41 ... image storage medium, 42 ... image output circuit, 5
0 ... Microprocessor.

Claims (5)

[Claims] 1. A measuring means for measuring an eye to be inspected, a fixation target display means for displaying a fixation target for guiding a visual axis of the eye to be measured in a measuring direction of the measuring means, and the eye to be inspected. In an ophthalmologic measuring device including an observing unit for observing, a voice storage unit that stores at least a voice that guides the eye to be seen to see the fixation target as a voice signal, and the voice storage unit. An ophthalmologic measuring apparatus comprising: a sound reproducing unit that reproduces a stored sound signal as a sound, and a sound output unit that outputs the sound reproduced by the sound reproducing unit. 2. The ophthalmologic measuring apparatus according to claim 1, further comprising: a voice input means for inputting voice and capturing a voice signal, and a recording means for storing the voice signal captured by the voice input means in the voice storing means. An ophthalmologic measuring device further comprising: 3. A measuring means for measuring an eye to be inspected, a fixation target display means for displaying a fixation target for guiding a visual axis of the eye to be measured in a measuring direction of the measuring means, and the eye to be inspected. An ophthalmologic measuring apparatus including an observing unit for observing, comprising: an image reproducing unit that reproduces at least one type of image signal as an image, and the fixation target display unit displays the image reproduced by the image reproducing unit. And an ophthalmologic measuring device displaying the fixation target. 4. The ophthalmic measurement apparatus according to claim 3, wherein the image reproduction means reduces or enlarges the size of the image. 5. The ophthalmologic measuring apparatus according to claim 3, further comprising: an image storage unit that stores at least one type of image signal, and an image capturing unit that captures an image signal by capturing an image of a subject.
An ophthalmologic measuring apparatus further comprising: a recording unit that stores the image signal captured by the photographing unit in the image storage unit.