JP3311047B2 - Ophthalmic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmic apparatus for observing and measuring an eye to be examined.

[0002]

2. Description of the Related Art In a conventional ophthalmic apparatus, in order to accurately align an eye to be examined with the apparatus, a sliding table on which the apparatus is mounted and a fixed table relatively move in the front-rear direction and the left-right direction. A mechanism is provided. This sliding mechanism has a complicated mechanism called a joystick mechanism in order to realize coarse movement and fine movement. The weight of this mechanism is several kg to 30K
g. In recent years, with the development of electronics, a relatively small and light ophthalmic apparatus has been developed, and a handheld non-contact tonometer has also been proposed.

[0003]

However, although the above-mentioned sliding mechanism has the advantage that it can be moved accurately, the structure is complicated and the capacity is large, so that the apparatus becomes large and expensive. There was a disadvantage. In addition, the hand-held device can examine the eye to be examined while lying on a bed, but when examining the eye to be examined of a sitting patient, compared to a conventional stationary device, There is a problem that alignment is difficult. The present invention has been devised in view of the above circumstances, and has as its technical object to provide an ophthalmologic apparatus having a simple structure and easy alignment.

[0004]

The present invention has the following features to achieve the above object. (1) An apparatus having an observation optical system for observing the eye to be inspected, a measurement optical system for measuring the eye to be inspected, and a display means for displaying the measurement result.
And the device for use as a handheld device.
In an ophthalmologic apparatus having a handle fixed to a main body, a reference mark for guiding alignment with an eye to be examined is horizontal.
Surface on the painted Te - inborn table and, a sliding bearing provided on the support portion and a bottom portion which detachably holds the handle portion
The handle can be moved back and forth and left and right on the table.
When the device is held by the support, the device body
And a moving table that moves .

[0005]

[0006]

[0007]

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a corneal shape measuring device that can be used as a hand-held type (as the optical system of the device uses a well-known one,
(Description is omitted). Reference numeral 1 denotes a measurement unit for measuring a corneal shape. The measurement unit 1 includes a measurement head 2 having a built-in measurement optical system and the like, and a handle unit 3 held by one hand by an operator. An operation switch group 4 is arranged above the measuring head 2, and an observation window 5 and a liquid crystal display 6 of the measurement result are arranged on the operator side. Reference numeral 7 denotes a support for supporting the measuring unit 1. The support 7 includes a support 26 configured to support the measuring unit 1 at a predetermined position.
The support 8 is provided with a printer 8 for recording the measurement results and the like. Reference numeral 9 denotes a charge / power switch for charging, and reference numeral 10 denotes a power cable. Numeral 11 denotes a sliding bearing made of a material having a low friction. As the material of the sliding bearing 11, a material having a low friction coefficient such as fluororesin or polyacetal is used. In the embodiment, as shown in the bottom view of FIG.
A total of three are mounted on the operator side and one on the subject side. At the center of the bottom of the support 7 is mounted a light emitting and receiving element 12 for emitting and receiving infrared light. The light receiving and emitting signal of the light emitting and receiving element 12 is processed, and a table on which the support 7 is placed is mounted. The difference between the reflectivity of the sheet of the bull T is detected, and the left and right of the eye to be inspected is determined.

The positioning sheet for the table T is constructed as shown in FIG. L is a positioning straight line printed so that alignment with the eye to be inspected is easy. When the measurement or observation axis is placed in an appropriate positional relationship with respect to the eye to be examined, a large number of parallel straight lines and a line in the front-back direction of the support table are printed. In the area where the straight line is drawn, areas a and b where colors having different reflectances are printed are drawn.

The support 7 supports the measuring section 1 and has a charging mechanism for the measuring section and a communication mechanism between the two. FIG. 4 is a partial cross-sectional view when the handle 3 of the measuring unit 1 is placed on the support 7. Reference numeral 21 denotes an outer cylinder of the handle portion 3, and a part below the outer cylinder is constituted by a conductor 22. Reference numeral 23 denotes a secondary battery held in the outer cylinder 21, for example, a nickel cadmium battery. The negative electrode of the secondary battery 23 is connected to the conductor 22, and the positive electrode is connected to a positive terminal 24 exposed at the center of the lower surface of the handle 3.
Reference numeral 25 denotes an upper plate of the support 7. A notch is formed on a side surface of the support portion 26 so that a negative terminal 27 connected to the charging circuit is in contact with the conductor 22.
In addition, the plus terminal 28 connected to the charging circuit is
And extends upward from the bottom of the terminal and contacts the positive terminal 24. 2
Reference numeral 9 denotes a coil spring for urging the plus terminal 27 upward. A light-emitting element 30 and a light-receiving element 32 are attached to the bottom of the handle 3, and a light-receiving element 31 and a light-emitting element 33 that are paired with these elements are also provided on the support section 8. Signals are exchanged between the light emitting element and the light receiving element to perform bidirectional communication.

Next, the data communication circuit of the embodiment will be described.
Description will be given based on the block diagram of FIG. The signal from the measuring system is processed by the measuring circuit 34 and then sent to the microcomputer 35. The micro computer circuit 35 performs a predetermined arithmetic processing and outputs data such as a corneal curvature radius.
Get the data. The measurement result is displayed on the display 6 via the display circuit 36. Further, regarding the transmission of the measurement data to the support table 7, the measurement data from the microcomputer circuit 35 is transmitted.
The light is converted into an optical communication signal through the transmission circuit 37 and the light emitting element 30 and sent to the light receiving element 31 of the support 7. The optical signal received by the light receiving element 31 is processed by the receiving circuit 38 and sent to the microcomputer circuit 39. The micro computer circuit 39 can send the measurement data to the printer via the printer driving circuit 40 and print it. The data of the microcomputer 39 is sent to the host computer via the communication circuit 41 and the communication connector 42. Reference numeral 43 denotes a detection switch for detecting that the handle 3 has been inserted into the support. A processing circuit 44 drives the light emitting / receiving element 12 to process a signal.
The signal processed by the processing circuit 44 is input to the microcomputer circuit 39 to detect which side in the left-right direction the signal is displaced.

Next, the operation of the corneal shape measuring apparatus having the above configuration will be described. The measuring section 1 can be held by one hand of the operator by pulling it upward from the supporting section 26 of the supporting table 7. It is used as a hand-held device for bedridden patients or infants. The operation in the case where the measurement unit 1 is fixed to the support base 7 for measurement will be described. Measurement unit 1
Is mounted on a support table 7 which can be moved up and down.
Placed on top. The subject's head is fixed to the chin rest. The left and right and coarse front and rear alignment with the eye to be examined is performed. By the action of the slide bearing 11, the support 7 can move on the table T in any direction. The line in the front-back direction of the support 7 is placed so as to be parallel to the positioning straight line L. The operator can hold the handle 3 to perform positioning with one hand. Thereafter, the operator finely moves the support 7 in front or behind in parallel with the positioning straight line L while looking at the positioning straight line L. When the observation image from the observation window reaches a predetermined state, the alignment is completed. Since the positioning of the corneal shape measuring device is relatively rough as compared with other devices, the positioning can be easily performed by gazing the fixation target in the measuring unit 1 to the eye to be inspected. it can. The light emitting / receiving element 12 receives the reflected light from the sheets a and b, and the received light signal is processed by the processing circuit 44, and the microcomputer 39 determines whether the eye to be measured is the right eye or the left eye. I do. The left and right discrimination signals are input to the microcomputer 35 via the communication mechanism and displayed on the display 6. When the positioning is completed, the measurement switch is pressed, and the corneal curvature radius and the like are measured. The left and right discrimination signals when the measurement switch is pressed are input to the microcomputer 39 via the communication mechanism together with the measurement data, and output as data to a printer or the like.

In the above embodiment, various modifications are possible, and it goes without saying that the present invention can be applied not only to a hand-held device but also to a stationary device. In this case, the structure of the device is changed. It can be largely omitted. Also,
The communication means is not limited to the wireless communication means, and the positioning straight line L may be provided in the left-right direction and used as a reference line moving in the left-right direction. The present invention includes such modifications within the scope of making the technical idea the same.

[0014]

According to the present invention, it is possible to provide an ophthalmologic apparatus having a simple structure and easy alignment.

[Brief description of the drawings]

FIG. 1 is an external view of a corneal shape measuring apparatus according to the present embodiment.

FIG. 2 is a bottom view of the device.

FIG. 3 is a view showing a positioning sheet plate.

FIG. 4 is a partial cross-sectional view when the handle is placed on a support base.

FIG. 5 is a block diagram showing a data communication circuit of the apparatus.

[Explanation of symbols]

 T table L positioning straight line a, b printing area 1 measuring section 2 measuring head 3 handle section 7 support base 11 sliding bearing 12 light emitting / receiving element

Claims (1)

(57) [Claims] An observation optical system for observing an eye to be inspected, a measurement optical system for measuring an eye to be inspected, and a display means for displaying a measurement result.
To be used as a handheld device
In an ophthalmologic apparatus having a handle fixed to the apparatus body, a reference mark for guiding alignment with the eye to be examined is provided.
Te drawn on a horizontal plane - lifting table and, a sliding bearing provided on the support portion and a bottom portion which detachably holds the handle portion
The table can be moved forward, backward, left and right on the table.
When the hand is held by the support, the device main body is
An ophthalmologic apparatus comprising: a moving table that moves to the right .