JPH0666620U - Holding stand for transparent objective refractometer - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to use the transparent objective refractometer even when both hands cannot be used, and fatigue occurs due to holding the measuring part by hand during long-time measurement. Do not squeeze, and facilitate the alignment of the measurement center and the eye center. [Structure] A receiving portion 10b for fixing the measuring portion 4 and an index 11 provided at an appropriate position on the measurement center line g of the measuring portion fixed to the receiving portion are provided. 1 is a holding stand for a transparent objective refractometer, in which a target is moved and operated in a fixed relative arrangement state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a holding stand for a transparent objective refractometer, which is used when measuring the refractive index of an eye by the transparent objective refractometer.

[0002]

[Prior art]

 A device for measuring the refractivity of the eye has existed in the past, but it is supposed to be used by a person by moving a face to a positioning portion of the measuring device. This makes it inconvenient to use depending on the condition of the person being measured, so that it is now possible to move the measuring part of the measuring device to the position of the person's eye and use the transparent objective type. A refractometer has been developed and is already known.

The outline of this measuring machine will be described below with reference to FIGS. 2 to 4. That is, 1 is a main body, on which a TV monitor 2, an output printer 3 and the like are provided. Reference numeral 4 is a measuring unit electrically connected to the main body 1. The measuring section 4 emits measuring light and receives the reflected light from the retina, and a central window 5 and a pair of small windows 6a, 6b for emitting light for determining the position of the measuring section 4. And a diagonal half mirror 7 for reflecting the light emitted from these windows in a desired direction.

When measuring the degree of refraction of the eye with this measuring instrument, as shown in FIG. 2, the measuring unit 4 is held by hand, and the measuring unit 4 is placed along the upper and lower sides of the face, and the measuring center line g of the measuring unit 4 is measured. Align with the center of the pupil of the eye. On the other hand, the person to be measured is allowed to see through the half mirror 7 and look at an appropriate object at a relatively distant position. The light emitted from the small windows 6a and 6b reaches the eyeball through the half mirror, is reflected there, and then enters the central window 5 through the half mirror 7 again. The sights p, p are projected, and the measurer moves the measuring unit 4 in an appropriate direction of up, down, left and right of the face while looking at the two sights p, p, and the reference mark is drawn on the TV monitor 2. It is assumed that they are symmetrically arranged on m. Under this condition, the measurement light is emitted from the central window of the measurement unit automatically or by manual operation, and reaches the retina of the eye through the harf mirror, where it is reflected, and then passes through the half mirror again and enters from the central window. Therefore, the body part automatically measures the refractive index of the eye using this reflected light as a medium.

The result of such refractivity measurement is output from the printer as, for example, sphericity, cylindricity, axial angle, or the like. This sphericity represents the degree of the positional displacement distance a1 or a2 between the retina k and the focal point f1 or f2 formed by refracting the measurement light by the eye. Represents the degree of distortion of the cross section of the light beam after being refracted by the eye (for example, the cross section of the xx section in FIG. 3), and the axial angle is, for example, the shape of the xx section shown in FIG. If there is, it represents the angle θ around the measurement center c of the position p1 where the largest strain occurs. Incidentally, z1 in FIG. 4 is an axis line showing the lateral direction of the face, and z2 is an axis line showing the vertical direction of the face.

By the way, the refractivity measuring instrument described above is extremely useful because it can measure even an infant, a sick person, or the like who has difficulty performing subjective movements irrespective of the will of the person, that is, objectively. Yes, it is expected to be widely used in the future.

However, since this measuring instrument measures by holding the measuring unit 4 by hand, it may not be possible to perform the measurement under a situation where the hand cannot be used during surgery, etc. It can be difficult to handle when you have to keep measuring over time.

It is desired to eliminate such a situation, but there is no existing device for it.

[0009]

[Problems to be solved by the device]

 The present invention does not make it possible to easily perform the measurement with the above-mentioned transparent objective refractometer even when any hand cannot be used during surgery, and it must be measured for a long time. An object of the present invention is to provide a holding stand for a transparent objective refractometer, which can be performed with less fatigue even when it does not occur. It also facilitates the alignment of the center of measurement with the center of the eye.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises a receiving part for fixing the measuring part, and an optotype which is fixed to the receiving part and which is provided at an appropriate position substantially on the measurement center line, A holding stand for a transparent objective refractometer, in which the receiving part and the optotype are moved and operated in a fixed relative arrangement.

[0011]

[Action]

 The receiving part is moved integrally with the optotype while the measurement part of the refractometer is fixed, and when the person to be measured looks at the optotype, the pupil comes on the measurement center line and the pupil center becomes the measurement center. Will be matched. This allows the measurement unit to be stably held in the proper position without having to hold it by hand, and is ready for measurement.

[0012]

【Example】

 FIG. 1 is a view showing an embodiment of the device of the present invention. In the figure, the substantially same parts as those described above are designated by the same reference numerals.

The device of the present invention comprises a base 8 on which a column 9 is vertically erected, and an arm portion 10 which is rotatable around the column 9 is provided.

At this time, it is preferable that the column 9 and the arm base 10a are vertically expandable and horizontally expandable and contractible, and a caster (not shown) is provided on the lower surface of the base 8 for facilitating the movement thereof. Is good. On the other hand, a bellows type bending member may be used for supporting.

The arm portion 10 has a receiving portion 10b for fixing the measuring portion 4 of the transparent objective refractometer, and a measuring center line g of the measuring portion 4 fixed to the receiving portion 10b. And an index 11 fixed at an appropriate position. In the illustrated example, the receiving portion 10b and the indicator 11 are fixed relative to each other, and the indicator 11 is a lamp.

Reference numeral 12 is a foot switch, which is used to start the measurement operation of the measuring unit 4 and to turn on the lamp 11.

An example of use and operation of the above embodiment will be described. Prior to use, the measuring unit 4 is fixed to the receiving unit 10b. The lamp 11 is located on the measurement center line g of the measuring unit 4. After that, the arm 10 is swung to move the measuring unit 4 to, for example, substantially above the eyes of the person to be measured lying on the bed, and then the person to be measured sees the lamp 11 through the harf mirror 7. It is made to look at the center position right above it, and fine adjustments are made as necessary. In this case, even if the consciousness of the person to be measured is not clear and no response is obtained, the position can be specified by the sights p, p marked on the television monitor 2. Thus, the center of the pupil of the measurement subject is positioned on the measurement center line g of the measurement unit 4.

Under the condition that the person to be measured looks at the optotype, the person to measure starts the refraction index measurement by stepping on the foot switch 12 or the like. In this case, the measuring operation can be automatically performed by the measuring machine itself detecting that the measuring unit 4 is located at the proper position.

In the present invention, the measuring unit 4 is stably held by the receiving unit 10b and it is not necessary to hold the measuring unit 4 by hand, and this makes it possible to perform the measurement when both hands cannot be used. In addition to eggplant, it shall not cause fatigue during long-time measurement. In addition, the presence of the visual target 11 enables the measurement unit 4 to be positioned easily and quickly, and makes the state of the eyeball or pupil during the measurement appropriate to enable accurate measurement.

Especially when the device of the present invention is used during surgery for cataract or the like, even when both hands of the doctor are closed, the refractive index of the eye of the patient lying on the bed is objectively and under certain conditions. It can be measured accurately and has a great effect on improving the visual acuity after surgery.

In the above embodiment, it is optional that the relative distance between the receiving portion 10b and the visual target 11 can be changed and adjusted, and that the levelness of the receiving portion 10b can be changed and adjusted.

[0022]

[Effect of device]

 As described above, according to the present invention, even when both hands cannot be used, the transmission type objective refractometer can be easily measured, and fatigue can be caused even when the measurement is performed for a long time. In addition to being easy to perform alignment to align the center of measurement with the center of the eye, it is possible to perform accurate measurements during surgery, especially under certain conditions. It contributes to medical treatment.

[Brief description of drawings]

FIG. 1 is a diagram according to an embodiment of the present invention.

FIG. 2 is a view showing a mode of use of the transparent objective refractometer.

FIG. 3 is a cross-sectional view of an eyeball.

FIG. 4 is a view showing a cross section taken along the line xx of FIG. 3 for explaining an axial angle.

[Explanation of symbols]

 4 measuring unit 10a receiving unit 11 visual target g measurement center line

Claims (1)

[Scope of utility model registration request] 1. A receiving part for fixing a measuring part, and an optotype fixed to a specific position associated with the receiving part. The receiving part and the optotype are moved and operated in a fixed relative arrangement state. A holding stand for the transparent objective refractometer, which has a structure.