JP3945009B2 - Ophthalmic equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ophthalmologic apparatus such as an eye refractive power measuring apparatus.
[0002]
[Prior art]
As an ophthalmologic apparatus, for example, an autorefractometer for measuring eye refractive power or the like is known. When measuring the refractive power of the eye to be examined using an autorefractometer, it is necessary to first align the apparatus body and the eye to be examined (alignment adjustment) with a television monitor.
[0003]
For this purpose, an operation is generally performed in which a reference mark having a round shape, a square shape, or the like is provided on a television monitor and an alignment bright spot is placed in the reference mark. In other words, the examiner operates the joystick or the like while observing the anterior eye image of the eye to be examined displayed on the TV monitor and the alignment luminescent spot reflected from the anterior eye part, and the alignment luminescent spot enters the reference mark. Adjust the position as follows. When the alignment bright spot enters the reference mark, the examiner starts measuring the eye to be examined by pressing a measurement button or the like.
[0004]
Usually, in the autorefractometer, a fixation target for fixing the eye to be inspected for the purpose of releasing the adjustment of the eye to be examined is provided so as to be movable in the focus direction of the eye to be examined. Moving this fixation target in the focus direction of the eye to be examined is called “clouding” or “clouding operation”. After the clouding operation is completed and the adjustment of the eye to be examined is removed, the refractive power is measured. Further, the measurement of refractive power is generally performed several times for the purpose of improving the measurement accuracy.
[0005]
[Problems to be solved by the invention]
However, in this type of conventional apparatus, during the alignment adjustment, the fogging operation, and the refractive power measurement, what operation the apparatus is currently performing is not displayed on the television monitor. For this reason, it is difficult for the examiner to grasp what operation the apparatus is performing. For example, there is a fear that the apparatus main body may be moved with respect to the eye to be inspected because the measurement is not performed normally despite the measurement being performed. As a result, the measurement is performed in a state where the alignment is not good, which causes a decrease in measurement accuracy.
[0006]
The present invention provides an ophthalmologic apparatus that clearly informs the examiner what operation the apparatus is currently performing, prevents the examiner from making a wrong decision, and obtains a highly accurate measurement value. With the goal.
[0007]
In order to solve the above problems, the present invention is characterized by having the following configuration.
According to the first aspect of the present invention, “ a light source that illuminates an eye to be examined, a light receiving element for measurement that receives reflected light of illumination light reflected by the eye to be examined, and a refractive power measurement using a signal from the light receiving element for measurement”. An arithmetic circuit that calculates a value, an imaging device that images the eye to be examined, an image processing unit that combines the observation image captured by the imaging device captured as a video signal and the eye refractive power measurement value, and the synthesized In the eye refractive power measurement apparatus having a display for displaying an observation image and the eye refractive power measurement value, the display has a character control unit for displaying a character indicating that the eye is being aligned. An ophthalmologic apparatus characterized by this.
The invention according to claim 2 is an “eye refractive power measuring device characterized in that the character control unit displays a character indicating that the eye refractive power is being measured for the eye to be examined” on the display device. is there.
[0008]
According to a third aspect of the present invention, “in the eye refractive power measuring device,
A fixation target that is movable in the direction of the focus of the subject eye, and is used for a cloud fog operation for removing the adjustment action of the subject eye;
The eye refraction measuring device according to claim 1 or 2, wherein the character control unit displays a character representing the clouding motion.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on the embodiment shown in FIGS.
FIG. 1 is a diagram illustrating an overall configuration of an ophthalmologic apparatus according to the present embodiment. Specifically, it is shown that the optical system 1 includes an autorefractometer optical system 1, a CCD camera 2, a control arithmetic circuit 3, a mixing circuit 4, a television monitor 5, and a character control circuit 6.
[0010]
In FIG. 1, an infrared light source 11 for illuminating the eye E passes through the chopper 12, becomes a slit-like illumination light beam, is reflected in the direction of the eye E by the first optical path dividing member 13, and The light passes through the optical path dividing member 14 and is projected onto the eye E to be examined. The first optical path dividing member 13 and the second optical path dividing member 14 are half mirrors.
The reflected light from the fundus of the eye E passes through the second optical path dividing member 14, the first optical path dividing member 13, and the diaphragm 15 and is guided to the measurement light receiving element 16. A signal from the light receiving element 16 for measurement is input to the control arithmetic circuit 3 and is calculated as a refractive power measurement value of the eye 1 to be examined.
This measured value is input to the mixing circuit 4.
[0011]
On the other hand, the observation image of the eye E is reflected by the second optical path dividing member 14, passes through the third optical path dividing member 17 and the imaging lens 18, and is imaged on the CCD camera 2. The observation image of the eye E imaged on the CCD camera 2 is input to the mixing circuit 4 as a video signal.
The alignment detection is performed by using the illumination light reflected by the corneal apex of the eye E to be imaged as an alignment bright spot on the light receiving element 16 for measurement placed at a position conjugate with the cornea. . As will be described later, when it is recognized that the alignment luminescent spot is within a predetermined range, the alignment detection ends.
The eye E is emitted from the visible light source 19, passes through the fixation target 20 and the lens 21, and is projected by fixation light reflected by the third optical path dividing member 17 and the second optical path dividing member 14. The The third optical path dividing member 17 is a dichroic mirror that reflects visible light and transmits infrared light. The fixation target 20 is arranged so as to be movable in the focal direction of the eye E, and in order to remove the adjustment action of the eye E, it is possible to perform a cloud operation.
[0012]
In the case of alignment, it can be detected by a signal input from the measurement light receiving element 16 to the control arithmetic circuit 3. This signal is further input from the control arithmetic circuit 3 to the character control circuit 6, and the character control circuit 6 displays on the television monitor 5 a character representing the alignment. When manually aligning, the examiner naturally recognizes his actions, so it is not always necessary to display the character indicating that alignment is in progress. By displaying, it is possible to grasp the current operation.
[0013]
When the cloud operation is in progress, a signal is input to the control arithmetic circuit 3 from a drive device (not shown) that moves the fixation target 20 in the focal direction, and this signal is further input from the control arithmetic circuit 3 to the character control circuit 6. Then, the character control circuit 6 displays on the television monitor 5 a character representing the cloud fogging operation.
During the refractive power measurement, it can be detected by a signal input from the measurement light receiving element 16 to the control arithmetic circuit 3 as in the alignment. This signal is further input from the control arithmetic circuit 3 to the character control circuit 6, and the character control circuit 6 displays a character representing that the refractive power is being measured on the television monitor 5.
It should be noted that a signal generated during alignment, clouding operation, and refractive power measurement may be directly input to the character control circuit 6 without going through the control arithmetic circuit 3.
[0014]
FIG. 2 is a television monitor screen that displays that the alignment is in progress. On the monitor screen 21 of the television monitor 5, an anterior segment image 22 of the eye E is displayed, and a reference mark 23 and an alignment bright spot 24 are displayed in the center.
The anterior segment image 22 is formed on the CCD camera 2 and input to the mixing circuit 4. When aligning the apparatus main body with the eye E, the examiner operates a joystick or the like so that the alignment bright spot 24 enters the reference mark 23 while viewing the anterior segment image 22 projected on the television monitor 5. During this time, a character 25 indicating that alignment is being performed is displayed above the anterior segment image 22. The same applies to automatic alignment. A measurement value display area 26 is displayed below the anterior segment image 22.
FIG. 3 is a television monitor screen that displays a cloud fogging operation. When the alignment bright spot 24 enters the reference mark 23, the apparatus main body determines that the alignment is appropriate, and first performs a clouding operation for a certain period of time in order to remove the adjustment of the eye 1 to be examined. While the apparatus main body is fogging, a character 27 representing this action is displayed above the anterior segment image 22 on the monitor screen 21. The examiner sees this and can grasp that the apparatus main body is fogging the eye E to be examined. When the cloud for the eye E is finished, the apparatus main body starts measurement.
FIG. 4 is a television monitor screen that displays during measurement. During the refractive power measurement, a character 28 representing this action is displayed above the anterior segment image 22 on the monitor screen 21. The examiner sees this, and can grasp that the apparatus main body is measuring the eye E to be examined.
FIG. 5 is a television monitor screen that displays the end of refractive power measurement. On the monitor screen 21 of the television monitor 5, an anterior segment image 22 of the eye E is displayed, and a reference mark 23 and an alignment bright spot 24 are displayed in the center. When the measurement for the eye E is completed, the character disappears, the reference mark 23 blinks, and the measurement value display area 26 displays the measurement values of the eye E, for example, the spherical power S, the astigmatism power C, and the astigmatism axis A values. Is done. When the examiner recognizes at least one of the disappearance of the character, the reference mark 23 blinking, or the measurement value displayed in the measurement value display area 26, the measurement is completed. Grasp that. Of course, a character indicating the end of measurement may be displayed without erasing the character.
In this embodiment, an example is shown in which a character is displayed on a television monitor. However, if it is possible to inform the examiner what operation the apparatus body is performing, sound or vibration may be used. It may be used in combination with character display.
[0015]
【The invention's effect】
As described above, according to the ophthalmologic apparatus according to the present invention, it is possible to easily and reliably tell the examiner what operation the ophthalmologic apparatus main body is currently performing. It is possible to prevent erroneous operations such as moving the device inside, and to prevent the measurement accuracy from deteriorating.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of an ophthalmologic apparatus according to an embodiment of the present invention.
FIG. 2 is a television monitor screen that displays during alignment according to the embodiment of the present invention.
FIG. 3 is a television monitor screen that displays a cloud fog operation according to the embodiment of the present invention.
FIG. 4 is a television monitor screen that displays a measurement operation according to the embodiment of the present invention.
FIG. 5 is a television monitor screen that displays the end of measurement according to an embodiment of the present invention.
[Explanation of symbols]
E Eye to be inspected 1 Autorefractometer optical system 2 CCD camera 3 Control arithmetic circuit 4 Mixing circuit 5 TV monitor 6 Character control circuit 7, 27, 28 Character

Claims (3)

A light source for illuminating the eye to be examined;
  A light receiving element for measurement that receives the reflected light of the illumination light reflected by the eye to be examined; and
  An arithmetic circuit for calculating a refractive power measurement value based on a signal from the light receiving element for measurement;
  An imaging device for imaging the eye to be examined;
  An image processing unit that combines the observation image captured by the imaging device captured as a video signal and the eye refractive power measurement value;
In the eye refractive power measuring apparatus having a display for displaying the synthesized observation image and the eye refractive power measurement value,
  An eye refractive power measuring apparatus, comprising: a character control unit for displaying a character indicating that the display device is being aligned with the eye to be examined. The character control unit causes the display to display a character indicating that the eye refractive power is being measured for the eye to be examined. In the eye refractive power measurement device,
A fixation target that is movable in the direction of the focus of the eye to be used for the cloud fog operation for removing the adjustment action of the eye to be examined;
The eye refractive power measurement apparatus according to claim 1, wherein the character control unit displays a character representing that the cloud motion is being performed.

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