JP5578687B2 - Frenzel nystagmus photographing device - Google Patents

Description

  The present invention relates to a nystagmus photographing apparatus that is attached to Frenzel eyeglasses used for eye movement observation and shoots a moving image of eye movement.

Frenzel glasses are glasses having a convex lens of about 10 diopters and an illumination lamp for use in nystagmus examination.
Here, the nystagmus test is a test to check whether there is an abnormality in the movement of the eyeball, a gaze nystagmus test that checks the presence or absence of nystagmus while gazing at an object, and nystagmus without gazing at an object. There are mainly non-gaze nystagmus tests to check for the presence or absence.
Frenzel eyeglasses are special glasses mainly used for non-gaze nystagmus examinations. They have a thick convex lens of about 10 diopters to keep the eyes of patients etc. out of focus. The eyes look large and the movement of the eyeball is easy to observe.
Moreover, it is common to have an illumination lamp such as a small miniature bulb so that the movement of the eyeball can be easily observed even in the dark.

Since eye movement is an important index that objectively evaluates the cause and severity of illness, it is desirable to keep records for later verification.
However, since it has not been possible to record and store eye movement videos in the past, doctors generally recorded the characteristics of eye movements observed with Frenzel glasses in medical records. .

Patent Document 1 discloses Frenzel glasses equipped with a CCD camera. However, a main body for generating a CCD light source is required separately from the Frenzel glasses, and this main body and the CCD camera generally need to be connected by a wired cable. .
Therefore, when observing eye movement by moving the head, such as head position nystagmus test and head position conversion nystagmus test, there is a problem that this wired cable interferes with head movement.
In addition to such Frenzel glasses, if a light source generating body is required, it is not only expensive but also difficult to carry.
In addition, although the gazette of patent document 1 describes that an infrared camera and an infrared light emitter may be provided inside the light-shielding goggles and transmit / receive signals wirelessly, a specific configuration is disclosed. Even if it can be wireless, the CCD camera and infrared light emitter are heavy and impractical.

Japanese Patent No. 4464144

  SUMMARY OF THE INVENTION An object of the present invention is to provide a nystagmus photographing apparatus that is easy to attach to and remove from Frenzel glasses, is lightweight, and does not hinder eye movement observation.

A nystagmus photographing apparatus according to the present invention is a nystagmus photographing apparatus that is attached to the front surface of a Frenzel lens of a Frenzel eyeglass, and includes a main body part and an adapter part, and the main body part arranges a camera module via an eyepiece lens. In addition, a flash memory slot is provided, and a captured video can be recorded in the flash memory. The adapter unit can be attached to at least one eye of the Frenzel glasses , and the camera module uses a CMOS camera as a video device. It is composed of a module, can be photographed with the brightness of an illumination lamp included in the Frenzel glasses, and has no wired cable for connecting to an external device .

  Here, it is preferable that the camera module is capable of photographing with the brightness of the illumination lamp included in the Frenzel glasses, the main body portion has an audio receiving means, and adopting the AVI format as the recording file format, It is desirable that voice input is possible at the same time.

The camera module used in the present invention is preferably a CMOS camera module using CMOS (Complementary Metal Oxide Semiconductor) as an image element.
A solid-state imaging device using a CMOS consumes less power than a CCD, and an image processing circuit can be on-chip at a low cost.
The CMOS image sensor has a minimum illuminance of approximately 1 lux, and can record a clear image even under a small illumination lamp such as a miniature light bulb attached to the Frenzel glasses.

The flash memory used in the present invention is not limited, but an SDHC card is preferable because it is easily available.
SDHC cards include miniaturized miniSDHC cards, microSDHC cards, and the like.
The power source used for the operation of the camera module is preferably a lithium ion secondary battery from the viewpoint of miniaturization and weight reduction.
The reason why the eyepiece lens is provided in front of the camera module in the present invention is to clearly record an image of the eye movement through the thick convex lens of the Frenzel glasses.

  Since it is useful for later verification to take an eye movement according to how the head moves, it may have a microphone and a receiving means for voice input, in which case the AVI format is used as the recording file format. be able to.

The nystagmus photographing apparatus according to the present invention is preferably provided with a power switch button and a recording operation button on the main body. In this way, recording can be easily started and stopped according to the movement of the head and the observation of the Frenzel glasses. it can.
In addition, a liquid crystal monitor may be provided in the main body, and when this liquid crystal monitor is provided, a moving image can be confirmed on the spot or a recorded image can be reproduced.
It is also preferable that the image can be zoomed in and out.
Furthermore, a small infrared camera may be incorporated.

The nystagmus photographing apparatus according to the present invention can be reduced in weight and size to about 50 g, including a lithium ion secondary battery, of about 80 g or less, and can be easily attached to and detached from the Frenzel glasses.
Therefore, it is small and lightweight and easy to carry, and the influence of the head moving operation in the eye movement observation is small.

An example of the nystagmus photographing apparatus according to the present invention is shown, (a) is a perspective view seen from the adapter part side, and (b) is a perspective view seen from the body part side. An example of attachment of the nystagmus photographing device to the Frenzel glasses is shown, (a) shows before attachment, and (b) shows after attachment. An example in which Frenzel glasses and a nystagmus photographing apparatus are attached to a patient is shown, (a) shows before wearing the nystagmus photographing apparatus, and (b) shows after wearing. An example of a nystagmus photographing apparatus provided with a liquid crystal monitor in the main body is shown. (A) is the external view seen from the adapter part side, (b) shows the external view seen from the liquid crystal monitor side. An example in which the nystagmus photographing apparatus with a liquid crystal monitor is attached to the Frenzel glasses will be shown. (A) is before attachment, (b) shows after attachment. An example of a nystagmus photographing apparatus with an infrared camera is shown. (A) is the external view seen from the adapter part side, (b) shows the external view seen from the liquid crystal monitor side. An example in which the nystagmus photographing apparatus with an infrared camera is attached to Frenzel glasses will be described. (A) is before attachment, (b) shows after attachment.

A nystagmus photographing apparatus 10 according to the present invention includes a main body 11 and an adapter 12 that incorporate a module.
As shown in FIGS. 2 and 3, the adapter unit 12 can be attached to and detached from the lens frame 23 around the convex lens 22 of the Frenzel glasses 20.
The adapter portion 12 is intended to be attached to at least one eye of commercially available Frenzel glasses, and there is no limitation on its shape.
In the present embodiment, it has a cylindrical shape that can be fitted to the convex wall of the lens frame 23 protruding forward of the convex lens.

The main body 11 has an eyepiece 13 disposed inside the adapter 12 and a CMOS camera module inside the main body 11 behind the eyepiece 13.
It should be noted that an illumination lamp (not shown) is provided inside the Frenzel glasses, and the eye movement is photographed with this illumination.
In this example, the moving image size is 640 × 480 pixels, the recording rate is 30 frames per second, and the AVI format is adopted as the recording file.
Thereby, the moving image shooting for 5 minutes can be performed 10 times or more.

The main body 11 has a memory slot 14 for inserting a flash memory and a miniUSB terminal 18.
Further, the main body 11 has a power on / off switch 16 and a power lamp (red LED) 16a that is turned on when the power is turned on, and a recording lamp (blue LED) 17a that is turned on when the recording is turned on is provided outside. It has the position which becomes the side.
In this embodiment, the width dimension is about 50 mm, the height dimension is about 60 mm, and the depth dimension is about 45 mm when attached to the Frenzel glasses, and the weight is about 50 g with the memory card and the lithium ion battery inserted. It was.

  The main body 11 of the present embodiment has a microphone 15 for voice input so that words such as a doctor can be recorded together with a moving image.

As shown in FIG. 3, Frenzel glasses 20 are attached to both eyes of the patient 1 using a head holder 21.
When it is desired to photograph and record eye movement, the nystagmus photographing apparatus 10 according to the present invention is attached to one eye of the Frenzel glasses.
A power button 16 and a recording button 17 are mounted on the outer side surface of the main body 11 and have a display lamp and a microphone on the upper surface.
Thereby, it is easy to start and end by operating the power button 16 and the recording button 17.

4 and 5 show examples of the nystagmus photographing apparatus 10a provided with a liquid crystal monitor.
Parts having the same functions as those in the previous embodiment are given the same reference numerals, and the added functions will be described.
In this example, the monitor is built in so that the image of the liquid crystal monitor 30 appears on the surface (back surface) opposite to the adapter portion 12 of the main body portion 11.
A mode changeover switch 19 is provided in the main body 11 to switch between the recording mode and the reproduction mode.
As a result, the moving image being photographed can be confirmed on the monitor screen simultaneously with recording, and the recorded moving image can be reproduced.
The liquid crystal monitor 30 can enlarge (zoom in) and reduce (zoom out) a display image.
Although the illustration of a microphone or the like is omitted, it is provided in the same manner as in the previous embodiment.
6 and 7 show an example of a nystagmus photographing apparatus 10b with an infrared camera that incorporates a 2.7-type liquid crystal monitor 30 in the main body.
Switching between a moving image and a still image is also possible by the mode switch 19a.
In this embodiment, the light shielding cap 24 can be attached to the Frenzel glasses 20 and the infrared light emitting LED lamp 25 is provided on the Frenzel glasses 20.
The adapter unit 12 of the nystagmus photographing apparatus 10b is adapted to fit into the holder frame 23a of the light shielding cap of the Frenzel glasses.
In this embodiment, an infrared image can be confirmed on a monitor.
In addition, a function such as a microphone for voice recognition is also provided as in the first embodiment.

DESCRIPTION OF SYMBOLS 10 Nystagmus imaging device 11 Main body part 12 Adapter part 13 Lens 14 Memory slot 15 Microphone 16 Power switch 16a Power lamp 17 Recording button 17a Recording lamp 18 USB terminal 19 Mode switch 20 Frenzel glasses 21 Head holder 22 Convex lens 23 Lens frame 30 Liquid crystal monitor

Claims (3)

A nystagmus photographing apparatus to be attached to the front surface of a Frenzell lens of a Frenzel eyeglass, comprising a main body part and an adapter part, and the main body part has a memory slot for a flash memory and a camera module disposed via an eyepiece lens, The captured video can be recorded in flash memory, and the adapter part can be attached to at least one eye of the Frenzel glasses ,
The camera module comprises a CMOS camera module using CMOS as an image element, can be photographed with the brightness of an illumination lamp included in the Frenzel glasses, and has no wired cable for connecting to an external device. Shooting device. Said body portion has a receiving means of the voice, by adopting the AVI format as a recording file format, nystagmus photographing apparatus according to claim 1, wherein it is possible at the same time audio input and video recording. The body portion nystagmus photographing apparatus according to claim 1 or 2, comprising the liquid crystal monitor.

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