JPH09154818A - Eye examination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control an optometric part by detecting the attitude thereof. SOLUTION: When an examiner, while holding an optometric part 1 by his/her right hand, measures a testee's eye refractive power, an attitude detection right switch 10 laid at the corner of the optometric part 1 is pressed by the palm of the examiner's right hand. As a result, the screen of a TV monitor shows characters or numerals to be indicated along a normal direction easily visible to the examiner, upon receipt of a signal from the attitude detection right switch 10. Thereafter, the examiner observes right and left discrimination indications on the TV monitor 3, and makes confirmation as to whether the indications agree to an examined eye. If the indications relate to an eye not examined, the right and left indication selector switch of a switch part 7 is pressed to obtain correct indications. Then, the examined eye. when made to gaze at a fixed target in the optometric part 1, is illuminated with an external ocular illumination light source, thereby forming an examined eye image E' on the area sensor surface of observation optical system in the optometric part 1. As a result, the image E' is displayed on the TV monitor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus used in an ophthalmology clinic, an eyeglass store, or the like.

[0002]

2. Description of the Related Art A conventional optometry apparatus is a stationary type which is installed and used in a predetermined place, and the function of the stationary type is partially omitted to reduce the size and weight of the apparatus so that the apparatus can be carried around at an appropriate place. There is a handheld type that allows you to examine the eye.

[0003]

However, in the case of the stationary type, normally, in order to stabilize the position of the eye to be inspected, a chin rest on which the subject's face is placed and an abutment surface for applying the forehead are provided. However, if the face of a subject sitting in a wheelchair is placed on the chin rest and the eye is examined, there is a problem that the subject is forced to have a leaning posture. In addition, optometry for bedridden elderly people and patients lying in bed is more difficult.

In the case of a hand-held type, the posture of the subject during eye examination can be flexibly dealt with, but the orientation with respect to the eye may not be constant depending on how the device is held. It is difficult to see, and there is a problem that erroneous measurement may be performed when the relative angle between the device and the eye to be inspected at the time of measurement, such as measurement of the eye refractive power and the radius of curvature of the cornea.

The object of the present invention is to solve the above problems,
An object is to provide an easy-to-handle optometry device that can be used as a hand-held type or a stationary type.

[0006]

An eye examination apparatus according to a first aspect of the present invention for achieving the above object comprises an eye examination section having an optical system, and a holding section for holding the eye examination section by an examiner's hand. In an optometry apparatus having, an attitude detection unit that detects an attitude of the optometry unit when the optometry unit is held by the holding unit, and a control that controls the optometry unit based on information of the attitude detection unit. And means.

An optometry apparatus according to a second aspect of the invention has an optometry section which has an optical system and is held by an examiner, attitude detection means for obtaining attitude information of the optometry section, and And a control means for controlling the optometry unit based on the obtained posture information.

An optometry apparatus according to a third aspect of the invention has an optometry section having an optical system and held by an examiner, a mounting section for fixedly mounting the optometry section, and a posture of the optometry section. And a control unit that executes control of the optometry unit, and the control unit stops the control when the optometry unit is placed on the placing unit.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows a first embodiment of the optometry apparatus, and is a perspective view showing a state in which a handheld autorefractometer is joined to a mounting table. In this case, the optometry section 1 and the mounting table 2 are generally included, and the optometry section 1 is bonded to a bonding surface on the upper surface of the mounting table 2. The optometry unit 1 includes a television monitor 3, a power switch 4, a measurement start right switch 5, a measurement start left switch 6, a switch unit 7, a forehead pad 8, a grip belt 9, a posture detection right switch 10, and a posture detection left switch 11. Is provided. Further, on the mounting table 2, a printer 12 for printing the measurement result, a power switch 13,
A power cable 14 is provided.

As shown in FIG. 2, when the optometry section 1 is viewed from the front, the measurement window 15 and four external eye illumination light sources 16 for illuminating the external eye of the subject's eye are surrounded by the measurement window 15. It is provided.

As shown in FIG. 3, the switch section 7 includes a left / right display changeover switch 7a, an angle correction switch 7b for correcting a slight angle, and a brightness of a fixation target inside the optometry section. It is composed of a dimming switch 7c and a transfer switch 7d for transferring the measured value data to the printer 12. Inside the optometry section 1, a projection optical system for projecting infrared light onto the fundus of the eye E, a light receiving optical system for receiving infrared light from the fundus, and a fixation target optic for guiding the eye E under fixation. A well-known measurement system 21 necessary for measuring the eye refractive power of the observation optical system for observing the external eye of the eye E for alignment is included.

Further, a CPU 22 for photoelectrically converting the measurement light received by the measurement system 21 and calculating the eye refractive power based on the data is provided in the optometry section 1. The CPU 22 has a measurement start switch 5, 6, switch unit 7, attitude detection switch 1
0, 11, a display control unit 23 that controls the display contents of the television monitor 3, a memory 24 that stores the obtained eye refractive power, and a battery (not shown) are connected.

On the joint surface of the optometry section 1 with the mounting table 2, a transmitting section 26 for transferring measured value data to the CPU 25 inside the mounting table 2 and for supplying electric power from the mounting table 2. A contactor is provided, and on the joint surface of the mounting table 2 with the optometry section 1, a receiving section 27 for receiving measurement value data from the transmitting section 26 and a contact for supplying power to the optometry section 1. There is a child.

When the power switch 4 is pressed, power is supplied to the optometry unit 1 by the power stored in the battery in advance. When the battery is not charged, the optometry unit 1 is joined to the mounting table 2 and the power switch 13 of the mounting table 2 is pressed to supply power to the battery.

FIG. 4 is an explanatory view showing a state in which the examiner holds the optometry unit 1 in his right hand and measures the eye refractive power of the subject S.
At this time, the posture detection right side switch 10 provided at the corner of the optometry unit 1 is pressed by the palm of the examiner's right hand. In addition, the examiner makes the forehead rest 8 project from the state where the forehead rest 8 is housed on the side surface of the eye examination unit 1 toward the subject S side by the rotating mechanism, and passes the right hand through the grip belt 9 to hold the eye examination unit 1 while holding the subject eye. The contact member 28 of the forehead support 8 is brought into contact with the amount of S. The contact member 28 is made of an elastic material such as rubber or synthetic resin, and is attached to the end surface of the expanding and contracting support 29. Is extended and rotated to the position of the forehead S of the subject S. Although not shown, the abutment member 28 is provided inside the column 29.
The lock mechanism is used for storing the spring and the spring is installed so that it does not contract immediately when it is extended and brought into contact with the forehead.

FIG. 5 shows the display screen of the television monitor 3 at that time. The CPU 22 receives the signal from the posture detection right switch 10 and transmits it to the display control unit 23, and the display control unit 2
3 displays the characters or numbers displayed on the television monitor 3 in the direction of FIG. Further, the display control unit 23 displays the orientation on the upper left of the television monitor 3 in order to notify the examiner that the right hand is recognized. Further, the CPU 22 takes into consideration that the horizontal direction of the optometry unit 1 is in the same direction as the characters or numbers displayed on the television monitor 3 when calculating the measurement value.

The examiner looks at the left / right discrimination display displayed on the television monitor 3 and confirms whether or not it matches the eye to be measured. In the case of FIG. 5, R (right eye) is displayed. if,
When the display is for the eye on the side not to be measured, the left and right display changeover switch 7a of the switch unit 7 is pressed to match. When the eye E is made to gaze at the fixation target inside the optometry section 1 through the measurement window 15, the eye E is illuminated by the extraocular illumination light source 16, and the area sensor surface of the observation optical system in the optometry section 1 is further illuminated. An eye image E ′ to be inspected is formed on the image, and the image is photoelectrically converted and displayed on the television monitor 3 from the CPU 22 via the display control unit 23.

When the examiner determines that the relative angle between the eye image E'on the television monitor 3 and the eye examination unit 1 is deviated, when the examiner pushes the angle correction switch 7b of the switch unit 7, As shown in FIG. 5, the correction angle A is displayed on the television monitor 3 by the amount of pressing, and this angle is added when calculating the astigmatic axis of the measurement value. In the case of FIG. 5, the angle correction value is displayed as 0. Further, the optometry unit 1 is held so that the iris I of the eye image E ′ is focused and the center of the circular character C and the center of the pupil P projected on the television monitor 3 are within the measurable range. Align while doing. At this time, if the pupil P of the eye image E ′ to be inspected is narrower than that of the character C, in order to avoid erroneous measurement due to vignetting of the fundus reflected light of the eye E, the dimming switch 7c of the switch unit 7 is avoided. Press to reduce the brightness of the fixation target and dilate the eyes.

When the measurement start right switch 5 is pressed, the refractive power measurement value is calculated by the well-known measurement system 21 and CPU 22 described above. The calculated measured values are displayed on the TV monitor 3 as shown in FIG.
The image is displayed as shown in FIG.

Next, when measuring the other eye, the right and left display changeover switch 7a is pushed to match the eye to be measured, and the position of the contact member 28 of the forehead support 8 is measured above the eye. Move to. After that, measurement is performed in the same manner as the above-mentioned operation.

When the transfer switch 7d of the switch unit 7 is pressed, light or radio waves are transmitted as a medium from the transmitting unit 26 provided on the joint surface of the optometry unit 1 to the receiving unit 27 provided on the joint surface of the mounting table 2. The measurement data of both eyes stored in the memory 24 is transferred by the well-known communication means, and further transmitted from the receiving unit 27 to the CPU 25 in the mounting table 2 to output the measurement data from the printer 12.

FIG. 6 is an explanatory diagram showing a state in which the examiner holds the optometry unit 1 with his left hand and measures the eye refractive power of the subject S.
At this time, the posture detection left switch 11 provided at the corner of the optometry unit 1 is pressed by the palm of the examiner's left hand. In addition, the examiner causes the forehead support 8 to be projected toward the subject S side by the rotating mechanism in the opposite direction from the state in which the forehead rest 8 is stored on the side surface of the optometry unit 1 with the right hand, and the left hand is passed through the grip belt 9 for inspection. While holding the eye portion 1, the contact member 28 of the forehead support 8 is brought into contact with the forehead of the subject S.

FIG. 7 is a display screen of the television monitor 3 when the examiner holds the optometry unit 1 with his left hand. Since the posture detection left switch 11 provided at the corner of the optometry unit 1 is pressed by the palm of the examiner's left hand, the CPU 22 receives the signal from the posture detection left switch 11 and transmits it to the display control unit 23. The display control unit 23 displays the characters or numbers displayed on the television monitor 3 in the direction of FIG. In addition, the display control unit 2
In order to inform the examiner that he / she recognizes his / her left hand, the direction is displayed on the upper left of the television monitor 3. Furthermore, CPU2
2 considers that the horizontal direction of the optometry unit 1 is the same direction as the characters or numbers displayed in FIG. 7 when calculating the measurement value.
A series of operations for performing the measurement is the same as the above-described operation for holding the right hand, except that the measurement start left switch 6 is pressed instead of the measurement start right switch 5.

It should be noted that either the posture detection right side switch 10 or the posture detection left side switch 11 is omitted, and the on / off signal of the posture detection switch is detected from the state in which the posture of the optometry unit 1 is set in advance. Thus, it is possible to switch the display by determining which of the left and right hands of the examiner holds the optometry unit 1.

In the first embodiment, the posture of the optometry unit 1 is detected by pressing the switches 5 and 6 with the palm of the examiner. Instead, the rotation mechanism of the forehead support 8 supports the support 29. It is also possible to switch the display content of the television monitor 3 by detecting which of the left and right directions is present.

FIG. 8 shows a second embodiment of the optometry apparatus and is a perspective view of a handheld autorefractometer joined to a movable table provided with an alignment function. The same reference numerals are given to the above-mentioned members, and the description will be omitted. The automatic refractometer in this case includes an optometry unit 1, a movable base 32, a base 33, and a chin rest 34, and the optometry unit 1 includes the movable base 32.
Is joined to an abutting portion 36 provided on the upper end surface of the vertically movable support column 35 protruding from the upper surface of the.

On the movable table 32, a joystick 37 for performing alignment with the eye to be inspected, a measurement start switch 38 provided on the upper end surface of the joystick 37,
A printer 39 for printing measurement results, a switch unit 40, a power switch 41, and a power cable 42 are provided.
The switch unit 40 includes a light control switch 40a and a print switch 40b.

9 and 10 are plan views showing the joint surfaces of the optometry section 1 and the contact section 36, respectively. Various joining elements are provided on the respective joining surfaces, and the elements provided on the optometry section 1 side and the elements on the abutting section 36 side that come into contact with each other at the time of joining should function correspondingly. Has become. The holes 45 and 46 of the optometry section 1 correspond to the pins 47 and 48 of the contact section 36, respectively, and when joined, position the optometry section 1 with respect to the contact section 36. The steel plates 49 and 50 of the optometry section 1 correspond to the magnets 51 and 52 of the contact section 36, and when joined, the optometry section 1 is fixed to the contact section 36 by magnetic attraction.

As shown in the block circuit configuration diagram of FIG. 11, the contactor 53 corresponds to the contactor 54, and each contactor 53,
Reference numeral 54 denotes the CPU 22 inside the optometry unit 1 and the movable table 3
A terminal for communication of the CPU 55 and a terminal for supplying power to the optometry unit 1 inside 2 are provided. The transmitting unit 26 corresponds to the receiving unit 56 and is used to transfer the measured value data as in the case of the first embodiment. The terminal parts 57 and 58 are adapted to detect the attachment / detachment state of the optometry part 1 to / from the contact part 36. A switch 38, a switch unit 40, and a printer 39 are connected to the CPU 55.

FIG. 12 is an explanatory view showing a state in which the eye examination unit 1 is joined to the contact portion 36 and the eye refractive power of the subject S is measured. At this time, the forehead support 8 is stored on the side surface of the optometry unit 1. Instead of the forehead rest 8, the subject S places his or her face on the chin rest 34 to fix the position of the face, and the examiner holds the joystick 37 provided on the movable base 32 for measurement. The optometry section 1 has a hole 4 of the optometry section 1 with respect to the contact section 36.
The pins 47 and 48 of the contact portion 36 are inserted into the pins 5 and 46 to be positioned, and the steel plates 49 and 50 are fixed by the magnetic force of the magnets 51 and 52. Further, the terminals for communication and the terminals for power supply provided on each of the contacts 53 and 54 contact each other, and similarly, the transmitter 26, the receiver 56, and the terminals 57, 58 also contact each other. doing.

As shown in FIG. 11, the measurement start switch 3
The signal from 8 is transmitted to the CPU 55 in the movable table 32, and from there to the CPU 22 in the optometry unit 1 via the contacts 54 and 53, and a command for the measurement process is issued to the measurement system 21. The measurement data calculated by the CPU 22 is displayed on the television monitor 3 via the display controller 23.
And is stored in the memory 24.

Signals from the dimmer switch 40a and the print switch 40b of the switch unit 40 are transmitted to the CPU 55, and from there, via the contacts 54 and 53, the CPU 22.
Is transmitted to The signal from the dimming switch 40a is dimmed by the CPU 22 to the fixation target of the measuring system 21 as in the dimming switch 7c. The signal from the print switch 40b is sent to the CPU via the transmitter 26 and the receiver 56 of the measured value data stored in the memory 3 similarly to the transfer switch 7d.
It is transmitted to the printer 55 and is output to the printer 39 as required.

As described above, the terminal portions 57 and 58 include
A terminal is provided for the CPU 22 in the optometry unit 1 and the CPU 55 in the movable base 32 to communicate with each other. Since the terminals 57 and 58 are in contact with each other at the time of joining, communication is possible. CPU 22 and 55 are the optometry unit 1
It is determined that the contact portion 36 is in the joined state. On the contrary, when the terminals 57 and 58 are also separated at the time of separation, the CPUs 22 and 55 cannot communicate with each other when communication cannot be performed.
Judges that the optometry section 1 and the contact section 36 are in a separated state.

When the terminals 57 and 58 are separated, C
PUs 22 and 55 cannot communicate. This state is CPU2
The CPUs 22 and 25 determine that they are in the separated state, and the CPU 22 executes the above-described functions of the posture detection right switch 10 and the posture detection left switch 11. If in the separated state, the measurement start switch 38 and each switch 40 of the switch unit 40
When a and 40b are pressed, the CPU 55 sounds a buzzer or the like provided inside the movable table 2 in order to notify that it is a malfunction. This action is particularly effective for notifying that the optometry part 1 and the contact part 36 are not properly joined. Then, the CPU 55 disconnects the circuit for supplying power to the optometry unit 1 to stop the power supply.

When the terminals 57 and 58 are joined, CP
U22 and 55 are in communication. This state is CPU2
When the CPUs 22 and 55 determine that they are in the joined state, the CPU 22 stops the functions of the posture detection right switch 10, the posture detection left switch 11, and the angle correction switch 7b. Also, CP
U22 informs the display control unit 23 that it is in the joined state, and the display control unit 23 displays the characters or numbers displayed on the television monitor 3 in the direction of FIG. Further, the display control unit 23 stops the display of the orientation and the display of the correction angle A which were displayed at the time of separation. Further, the CPU 22 adds that the horizontal direction of the optometry unit 1 is in the same direction as the characters or numbers displayed in FIG. 7 when calculating the measurement value.

At the time of measurement in this joined state, the power switch 4
When 1 is pressed, electric power is externally supplied to the movable base 32 and the base 33 via the power cable 42. Further, the contact portion 36
The electric power is also supplied to the optometry unit 1 through the power supply terminals of the contactor 54 and the contactor 53 of the optometry unit 1. When the battery in the optometry unit 1 is not charged, the battery is also supplied with power.

As shown in FIG. 12, the examiner performs alignment on the subject S by the same operation as that of a known stationary autorefractometer. That is, with respect to the eye E of the subject S whose face is fixed to the chin rest 34, the examiner moves the movable base 32 with respect to the base 33 in the X and Y directions of FIG. Then, the vertical movement support column 35 is moved up and down in the Z direction, and the optometry unit 1 is moved three-dimensionally for alignment.

As in the separated state, the television monitor 3
The iris I of the eye image E ′ projected on the
Further, the circular character C displayed on the TV monitor 3
When the center of and the center of the pupil P are within the measurable range,
The measurement start switch 38 on the joystick 37 is pushed. When the measurement start switch 38 is pressed, it is transmitted to the CPU 22 in the optometry unit 1 through the transmission path described above, and similarly to the actions of the measurement start right switch 5 and the measurement start left switch 6 at the time of separation, the measurement system 21 The refracting power is measured by and the refracting power measurement value is calculated.

The calculated measurement values are displayed on the television monitor 3 and are further stored in the memory 24. Switch part 40
When the print switch 40b is pressed, the measurement value data of both eyes stored in the receiving unit 56 is transferred from the transmitting unit 26 through the above-described transmission path, and further transmitted from the receiving unit 56 to the CPU 55 in the movable table 2 to the printer 39. Is output from.

Further, in the second embodiment, the posture detection right side switch 10 and the posture detection left side switch 11 are not present, and the optometry unit 1 has a structure capable of measuring in only one direction of FIG. 4 or 6. In this case, the functions of the terminal portions 57 and 58 can be used to switch the display of the television monitor 3 between separation and joining.

Further, although the autorefractometer has been described in the above-mentioned first and second embodiments, for example, if it is an optometry apparatus capable of performing optometry independently by an optometry section having an optical system such as an autokeratometer, The configurations described in the embodiments can be applied.

[0042]

As described above, the optometry apparatus according to the present invention can detect the posture of the optometry section depending on how the optometry section is held, so that the apparatus and the subject such as the corneal curvature can be measured. Erroneous measurements can be avoided in measurements that require a relative angle with the examiner. Further, since the display on the television monitor is switched to a position where the examiner can easily see it, it is easy to grasp the displayed measurement value and the like. Furthermore, when holding the device for a long time or when it is difficult to hold the device because one hand is injured, the other hand can easily hold the device, and by changing the orientation of the device. There is no need to bother with various settings such as display position.

[Brief description of the drawings]

FIG. 1 is a perspective view of an auto refractometer according to a first embodiment.

FIG. 2 is a front view of an optometry unit.

FIG. 3 is a block circuit configuration diagram of a signal transmission path when the optometry unit is separated from the mounting table.

FIG. 4 is an explanatory diagram showing a state in which the subject is measured by separating the eye examination unit from the mounting table.

FIG. 5 is a front view of the television monitor screen when the examiner holds the optometry unit with the right hand.

FIG. 6 is an explanatory diagram showing a state in which the subject is measured by separating the eye examination unit from the mounting table.

FIG. 7 is a front view of the television monitor screen when the examiner holds the optometry unit with the left hand.

FIG. 8 is a perspective view of an automatic refractometer according to a second embodiment.

FIG. 9 is a plan view of a joint surface of an optometry unit.

FIG. 10 is a plan view of a joint surface of a contact portion.

FIG. 11 is a block circuit configuration diagram of a signal transmission path when the optometry unit is joined to a mounting table.

FIG. 12 is an explanatory diagram showing a state in which the subject is measured by joining the optometry unit to a mounting table.

FIG. 13 is a front view of the television monitor screen when the optometry unit is joined to the mounting table.

[Explanation of symbols]

 1 Optometry part 2 Mounting base 3 Television monitor 9 Grip belt 10 Attitude detection right side switch 11 Attitude detection left side switch 22, 25, 55 CPU 21 Measurement system 23 Display control part 32 Movable base 33 Base 34 34 Jaw rest 57, 58 Terminals Department

Claims (12)

[Claims] 1. An optometry apparatus having an optometry section having an optical system and a holding section for holding the optometry section by an examiner's hand, wherein the optometry section holds the optometry section by the holding section. An optometry apparatus comprising: a posture detection unit that detects the posture of a body; and a control unit that controls the optometry unit based on information from the posture detection unit. 2. The optometry apparatus according to claim 1, wherein the optometry unit has a display unit, and the control unit has a display switching unit that switches a display content or a display position displayed by the display unit. 3. The optometry apparatus includes a mounting table on which the optometry unit is mounted, a joining unit that detachably joins the optometry unit and the placement table, and the optometry unit and the placement table are joined together. The detection means for detecting whether or not they are joined in the means, and the control stop means for stopping the control by the control means based on the information detected by the detection means. The described optometry device. 4. The optometry apparatus according to claim 1, wherein the posture detection means has a switch means for detecting the hand of the examiner when holding the optometry unit with the hand of the examiner. 5. An optometry unit having an optical system, which is held by an examiner, a posture detection unit for obtaining posture information of the examination unit, and based on the posture information obtained by the posture detection unit. An optometry apparatus comprising: a control unit that controls the optometry unit. 6. The optometry apparatus according to claim 5, wherein the optometry section has a display section, and the control means controls the display of the display section. 7. The optometry apparatus according to claim 5, wherein the posture detection unit obtains posture information of the optometry unit by detecting the hand of the examiner when holding the optometry unit with the hand of the examiner. 8. The apparatus according to claim 5, further comprising a mounting section for fixedly mounting the optometry section, wherein the control means stops the control when the optometry section is mounted on the mounting section. Optometry device. 9. An optometry section having an optical system and held by an examiner, a mounting section for fixedly mounting the optometry section, and control of the optometry section according to a posture of the optometry section. An optometry apparatus, wherein the control means stops the control when the optometry section is placed on the placing section. 10. The optometry apparatus according to claim 9, wherein the optometry unit has a display unit, and the control unit controls the display of the display unit. 11. The posture detecting means according to claim 9, wherein the control means has posture detecting means for obtaining posture information of the optometry portion by detecting the hand of the examiner when holding the optometry portion with the examiner's hand. Optometry device. 12. The optometry apparatus according to claim 11, wherein the posture detection means has a switch means for detecting the hand of the examiner when holding the optometry unit with the hand of the examiner.