JP2016150017A - Ophthalmologic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ophthalmologic apparatus capable of acquiring accurate subject eye information even in the case of the subject eye with a disease.SOLUTION: The ophthalmologic apparatus comprises an optical system, a movement mechanism, a position designation part, and a control part. The optical system irradiates a subject eye with light and acquires the subject eye information on the basis of return light from the subject eye. The movement mechanism relatively moves the optical system with respect to the subject eye. The position designation part designates a target position to the subject eye. The control part controls the movement mechanism so as to match the position of the optical system with the target position designated by the position designation part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an ophthalmologic apparatus.

  An ophthalmologic apparatus is an apparatus capable of optically acquiring eye information. In general, the ophthalmologic apparatus acquires the eye information to be examined after performing automatic alignment.

  Such an ophthalmologic apparatus includes, for example, a measurement head provided to be movable in the left-right direction, the up-down direction, and the front-rear direction with respect to the base. The measurement head is provided with an optical system for optically acquiring eye information and alignment means for aligning the optical system with respect to the eye. The alignment means, for example, uses the position of the center of the pupil of the eye to be examined and the position of the corneal apex as the measurement position (examination position), and aligns the position of the optical system with the measurement position.

  However, depending on the type of eye disease possessed by the eye to be examined, the eye information to be examined may not be acquired at the measurement position. For example, when the eye to be examined is a cataract eye, depending on the turbidity of the lens, the light irradiated to the eye to be examined is diffused at the measurement position, and sufficient light does not reach the fundus or the return light from the eye to be detected is detected. I can't do it.

  Therefore, in a conventional ophthalmic apparatus, a measurement position is shifted by a user such as a doctor moving a measurement head using an operation unit such as a control lever.

JP 2014-140482 A

  However, in the past, it has been necessary for the user to search for a measurable position while shifting the measurement position using the operation means, and manually adjust the focus at the searched position. There is a problem that the measurement time (inspection time) becomes long. In addition, since the user searches for the measurement position using the operation means, it is difficult to arrange the measurement head at the desired measurement position in a short time with high accuracy. Therefore, depending on the type of eye disease, the accuracy of the eye information to be examined may be lowered.

  The present invention has been made to solve such a problem, and an object thereof is to provide an ophthalmologic apparatus capable of acquiring highly accurate eye information even for an eye to be examined with a disease. There is.

  An ophthalmologic apparatus according to an embodiment irradiates light to an eye to be examined, acquires an eye information based on return light from the eye to be examined, a moving mechanism that relatively moves the optical system with respect to the eye to be examined, A position specifying unit that specifies a target position with respect to the eye to be examined; and a control unit that controls the movement mechanism so that the position of the optical system is aligned with the target position specified by the position specifying unit.

  According to the ophthalmologic apparatus according to the present invention, it is possible to acquire highly accurate eye information even for an eye with a disease.

It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the operation example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the operation example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is a flowchart which shows the structural example of the ophthalmologic apparatus which concerns on embodiment. It is the schematic which shows the structural example of the ophthalmologic apparatus which concerns on embodiment.

  The ophthalmologic apparatus according to the embodiment can perform any subjective examination and / or any objective examination. The ophthalmologic apparatus according to the following embodiments can perform a distance test, a near-field test, a contrast test, a glare test, and the like as a subjective test, and an objective refraction measurement, a corneal shape measurement, and the like as the objective test Is an optometry apparatus (auto reflex keratometer). However, the ophthalmologic apparatus according to the present invention is not limited to this, and is configured to include an optical system that optically obtains eye information and means for moving the optical system relative to the eye to be examined. Any device may be used. As an ophthalmologic apparatus to which the present invention can be applied, there are an optical coherence tomography (hereinafter referred to as OCT) apparatus, an axial length measuring apparatus, a tonometer and the like in addition to the optometry apparatus according to the following embodiment. . The OCT apparatus is an apparatus that performs OCT on an arbitrary part of an eye to be examined such as a fundus or an anterior eye. The axial length measuring device is, for example, a device that measures the distance from the corneal apex position to the front surface of the retina as the axial length by irradiating light on the subject's eye. A tonometer is a device that measures intraocular pressure based on, for example, the amount of return light from the cornea obtained by illuminating the anterior segment of the subject's eye to which compressed air is blown, the pressure of compressed air, and the like. is there.

[Constitution]
(Appearance structure of ophthalmic device)
An external configuration of the ophthalmologic apparatus according to the embodiment is shown in FIG. The ophthalmologic apparatus 1 includes a base 2, a gantry 3, a head unit 4, a face receiving unit 5, a joystick 8, and a display unit 10. The ophthalmologic apparatus 1 may be a single apparatus or a combination of two or more apparatuses. In the latter case, a plurality of components described below are distributed in two or more apparatuses. For example, the ophthalmologic apparatus 1 includes an apparatus including an optical system, a driving mechanism, a control board, and the like for performing an examination, and a device for performing control and information input to the apparatus, and processing of output information from the apparatus. Consists of.

  The gantry 3 can be moved back and forth and left and right with respect to the base 2. The head unit 4 is configured integrally with the gantry 3. The face receiving portion 5 is configured integrally with the base 2.

  The face receiving portion 5 is provided with a chin rest 6 and a forehead rest 7. The face of the subject (not shown) is fixed by the face receiving unit 5. For example, the examiner performs an examination by positioning the ophthalmologic apparatus 1 on the opposite side of the subject. The joystick 8 and the display unit 10 are arranged at the position on the examiner side. The joystick 8 is provided on the gantry 3. The display unit 10 is provided on the surface of the head unit 4 on the examiner side. The display unit 10 is, for example, a flat panel display such as a liquid crystal display. The display unit 10 includes a touch panel display screen 10a.

  The head unit 4 is moved back and forth and left and right by tilting the joystick 8. The head unit 4 is moved in the vertical direction by rotating the joystick 8 with respect to its axis. By these operations, the position of the head unit 4 with respect to the face of the subject held by the face receiving unit 5 changes. The movement in the left-right direction is performed, for example, in order to switch the examination target by the ophthalmologic apparatus 1 from the left eye to the right eye or from the right eye to the left eye.

  An external device 11 is connected to the ophthalmologic apparatus 1. The external device 11 may be an arbitrary device, and the connection mode (communication mode or the like) between the ophthalmic device 1 and the external device 11 may be arbitrary. The external device 11 includes, for example, a spectacle lens measurement device for measuring the optical characteristics of the lens. The spectacle lens measuring device measures the power of the spectacle lens worn by the subject and inputs this measurement data to the ophthalmic device 1. The external device 11 may be any other ophthalmic device. The external device 11 may be a device (reader) having a function of reading information from a recording medium or a device (writer) having a function of writing information to the recording medium.

  Another example of the external device 11 is a computer used in the medical institution. Such hospital computers include, for example, a hospital information system (HIS) server, a DICOM server, a doctor terminal, and the like. The external device 11 may include a computer that is used outside the medical institution. Examples of such out-of-hospital computers include mobile terminals, personal terminals, servers and terminals on the manufacturer side of the ophthalmic apparatus 1, and cloud servers.

(Configuration of optical system)
The ophthalmologic apparatus 1 has an optical system for inspecting an eye to be examined. A configuration example of this optical system will be described with reference to FIG. The optical system is provided in the head unit 4. The optical system includes an observation system 12, a fixation target projection system 13, an objective measurement system 14, a subjective measurement system 15, and alignment systems 16 and 17. Reference numeral 9 denotes a processing unit that executes various processes.

  The observation system 12 has a function for observing the anterior segment of the eye E. The fixation target projection system 13 has a function for presenting a fixation target to the eye E. The objective measurement system 14 has a function for performing an objective test. The objective measurement system 14 of this example has a function of projecting a predetermined measurement pattern onto the fundus oculi Ef of the eye E and a function of detecting an image of the measurement pattern projected onto the fundus oculi Ef. The subjective measurement system 15 has a function for performing a subjective examination. The subjective measurement system 15 of this example has a function of presenting a visual target to the eye E to be examined. The alignment systems 16 and 17 have a function for aligning the optical system with the eye E (alignment). The alignment system 16 has a function for performing alignment in the direction (front-rear direction) along the optical axis of the observation system 12. The alignment system 17 has a function for performing alignment in a direction (vertical direction, horizontal direction) orthogonal to the optical axis of the observation system 12.

(Observation system 12)
The observation system 12 includes an objective lens 12a, a dichroic filter 12b, a half mirror 12c, a relay lens 12d, a dichroic filter 12e, an imaging lens 12f, and an image sensor (CCD) 12g. The output of the image sensor 12g is input to the processing unit 9. The processing unit 9 displays the anterior segment image E ′ on the display unit 10 based on the signal input from the image sensor 12g.

  A kerato plate 12h is provided between the objective lens 12a and the eye E to be examined. The kerato plate 12h is used to project a ring-shaped light beam for measuring the corneal shape onto the cornea C of the eye E. A configuration example of the kerato plate 12h is shown in FIG.

(Alignment systems 16 and 17)
An alignment system 16 is provided behind the kerato plate 12h. As described above, the alignment system 16 is used for alignment in the front-rear direction. The alignment system 16 includes an alignment light source 16a and a projection lens 16b. The projection lens 16b converts the light beam output from the alignment light source 16a into a parallel light beam and projects it onto the cornea C. The user or the processing unit 9 performs alignment by moving the head unit 4 in the front-rear direction with reference to an image (bright spot image) projected onto the cornea C by the alignment system 16.

  The alignment system 17 forms an optical path branched from the observation system 12 via the half mirror 12c. As described above, the alignment system 17 is used for vertical and horizontal alignment. The alignment system 17 includes an alignment light source 17a and a projection lens 17b. The projection lens 17b converts the light beam output from the alignment light source 17a into a parallel light beam. This parallel light beam is reflected by the half mirror 12 c and projected onto the cornea C through the optical path of the observation system 12. The user or the processing unit 9 performs alignment by moving the head unit 4 in the vertical direction and the horizontal direction based on the image (bright spot image) projected onto the cornea C by the alignment system 17.

  As shown in FIG. 2, an alignment mark AL and an index image (bright spot image) Br are displayed on the display screen 10a together with the anterior segment image E '. The alignment in the front-rear direction is performed, for example, by adjusting the position of the head unit 4 so that the index image Br is focused by the alignment light source 17a. Further, the alignment in the front-rear direction may be performed by adjusting the position of the head unit 4 so that the ratio of the distance between the two bright spot images by the alignment light source 16a and the diameter of the keratling image falls within a predetermined range.

  When the alignment is performed manually, the user adjusts the position of the head unit 4 by operating the joystick 8 while referring to the information displayed on the display screen 10a, for example. At this time, for example, the processing unit 9 may calculate an alignment shift amount from the ratio and display the shift amount on the display screen 10a. The processing unit 9 can perform control so as to start measurement in response to the completion of alignment.

  When the alignment is performed automatically, for example, the processing unit 9 calculates an alignment shift amount from the above ratio, and moves the head unit 4 by controlling the electric mechanism so that the shift amount is canceled. This mechanism includes an actuator that generates a driving force and a member that transmits the driving force to the head unit 4. The processing unit 9 can perform control so as to start measurement in response to the completion of alignment.

  In this embodiment, when the left-right direction is the X direction (first direction), the up-down direction is the Y direction (second direction) orthogonal to the left-right direction, and the front-rear direction is the Z direction orthogonal to both the left-right direction and the up-down direction. (Third direction).

(Fixation target projection system 13, subjective measurement system 15)
The fixation target projection system 13 (a subjective measurement system 15) includes an LED light source 13a that generates white light, a color correction filter 13b, a collimator lens 13b ′, a chart plate 13c, a half mirror 13d, and a relay lens 13e. A reflecting mirror 13f, a focusing lens 13g, a relay lens 13h, a field lens 13i, a variable cross cylinder lens (VCC) 13j, a reflecting mirror 13k, dichroic filters 13m and 12b, and an objective lens 12a. Including. The subjective measurement system 15 includes a glare light source 13n that irradiates the eye E with glare light.

  A fixation target and a target chart are formed on the chart plate 13c. The fixation target is a target for fixing the eye E to be examined. The fixation target in this example is, for example, a landscape chart. The optotype chart is an optotype for subjectively measuring the visual acuity value and correction power (distance power, near power, etc.) of the eye E. In this example, a plurality of target charts are formed on the chart plate 13c.

  In an objective test (objective refraction measurement or the like), a landscape chart is projected onto the fundus oculi Ef. Alignment is performed while the subject is staring at the scenery chart, and the eye refractive power is measured in a clouded state.

(Objective measurement system 14)
The objective measurement system 14 includes a ring-shaped light beam projection system 14A and a ring-shaped light beam light receiving system 14B. The ring-shaped luminous flux projection system 14A projects a ring-shaped measurement pattern on the fundus oculi Ef. The ring-shaped light beam receiving system 14B detects the reflected light from the fundus oculi Ef of this measurement pattern.

  The ring-shaped luminous flux projection system 14A includes a reflex measurement unit 14a, a relay lens 14b, a pupil ring 14c, a field lens 14d, a perforated prism 14e, a rotary prism 14f, dichroic filters 13m and 12b, and an objective lens. 12a. The reflex measurement unit 14a includes a reflex measurement light source (LED) 14h, a collimator lens 14i, a conical prism 14j, and a ring-shaped measurement pattern forming plate 14k.

  The ring-shaped light beam receiving system 14B includes an objective lens 12a, a dichroic filter 12b, a dichroic filter 13m, a rotary prism 14f, a perforated prism 14e, a field lens 14m, a reflection mirror 14n, and a relay lens 14p. It includes a focusing lens 14q, a reflecting mirror 14r, a dichroic filter 12e, an imaging lens 12f, and an image sensor (CCD) 12g.

  Each unit of the ophthalmologic apparatus 1 is controlled by the processing unit 9. For example, the processing unit 9 includes the LED light source 13a, the light source 14h, the glare light source 13n, the alignment light sources 16a and 17a, the kerato ring light source 12h ′ of the kerato plate 12h, the reflex measurement unit portion 14a, the focusing lenses 13g and 14q, and the chart plate 13c. The variable cross cylinder lens 13j, the display unit 10 and the like are controlled.

(alignment)
The ophthalmologic apparatus 1 moves the head unit 4 with respect to the subject's eye to be examined fixed to the face receiving unit 5, thereby obtaining various types of information about the subject's eye with respect to the subject's eye E. It is possible to perform alignment (alignment).

  When alignment is performed, the processing unit 9 turns on the alignment light sources 16a and 17a. The light beam output from the alignment light source 16a is projected onto the cornea C via the projection lens 16b and the kerato plate 12h. The light beam projected onto the cornea C is guided to the imaging element 12g via the kerato plate 12h, the objective lens 12a, the dichroic filter 12b, the half mirror 12c, the relay lens 12d, the dichroic filter 12e, and the imaging lens 12f. Thereby, two index images (bright spot images) of the alignment light source 16a are formed on the image sensor 12g. On the display screen 10a, index images (bright spot images) Lr1 and Lr2 are displayed on the anterior segment image E ′ (corneal image C ′ and pupil image P ′ shown in FIG. 4). For example, the processing unit 9 controls the actuator so that the index images Lr1 and Lr2 have a predetermined positional relationship, thereby moving the head unit 4 in the front-rear direction to perform front-rear alignment.

  The light beam output from the alignment light source 17a is projected onto the cornea C via the projection lens 17b, the half mirror 12c, the dichroic filter 12b, the objective lens 12a, and the kerato plate 12h. The light beam projected onto the cornea C by the alignment light source 17a is guided to the imaging element 12g through the same path as the light beam projected onto the cornea C by the alignment light source 16a. Thereby, an index image (bright spot image) of the alignment light source 17a is formed on the image sensor 12g. On the display screen 10a, an index image Br is displayed on the anterior segment image E ′ (corneal image C ′, pupil image P ′ shown in FIG. 4). For example, the processing unit 9 controls the actuator so that the shift amount between the position of the index image Br and the target position corresponding to the target position image in the alignment mark AL is canceled, thereby moving the head unit 4 in the left-right direction and the up-down direction. To the right and left and up and down.

(Cornea shape measurement function)
When the corneal shape measurement mode is selected, the processing unit 9 turns on the kerating light source 12h ′. The light beam output from the kerato ring light source 12h ′ is projected onto the cornea C as a corneal shape measuring ring light beam. The dichroic filter 12b transmits the corneal shape measurement ring-shaped light beam projected onto the cornea C. As a result, the image sensor 12g detects an image (not shown) of the corneal shape measurement ring-shaped light beam.

(Objective measurement function)
When the objective measurement mode is selected, the processing unit 9 turns on the light source 14h. The reflex measurement unit 14a is moved in the optical axis direction, and the focusing lens 13g is moved in the optical axis direction correspondingly.

  The ring-shaped measurement pattern (light beam) is guided to the dichroic filter 13m via the relay lens 14b, the pupil stop 14c, the field lens 14d, and the reflection surface 14e 'of the holed prism 14e. The measurement pattern reflected by the dichroic filter 13m is guided to the objective lens 12a via the dichroic filter 12b and projected onto the fundus oculi Ef.

  The ring-shaped measurement pattern formed on the fundus oculi Ef is condensed by the objective lens 12a, and the dichroic filters 12b and 13m, the rotary prism 14f, the hole 14e "of the holed prism 14e, the field lens 14m, the reflection mirror 14n, the relay The image is formed on the imaging element 12g by the imaging lens 12f via the lens 14p, the focusing lens 14q, the reflection mirror 14r, and the dichroic filter 12e, whereby the imaging element 12g forms an image of a ring-shaped measurement pattern (not shown). Abbreviated).

(Awareness measurement function)
When the awareness measurement mode is selected, the processing unit 9 turns on the light source 13a. The light beam output from the light source 13a illuminates the chart plate 13c through the color correction filter 13b. Various charts (charts) are provided on the chart plate 13c. Further, the processing unit 9 moves the focusing lens 13g to a position corresponding to the result of the objective measurement. Similarly, the processing unit 9 controls the variable cross cylinder lens 13j so that the astigmatism state is corrected based on the astigmatism state (astigmatism degree, astigmatism axis) of the eye E obtained by objective measurement.

  When the examiner or the processing unit 9 selects the target, the processing unit 9 controls the chart plate 13c so that the selected target is arranged in the optical path. The luminous flux that has passed through the target is a half mirror 13d, a relay lens 13e, a reflecting mirror 13f, a focusing lens 13g, a relay lens 13h, a field lens 13i, a variable cross cylinder lens 13j, a reflecting mirror 13k, dichroic filters 13m and 12b, The light is projected onto the fundus oculi Ef via the objective lens 12a.

  The subject responds to the visual target projected onto the fundus oculi Ef. The selection of the target and the response thereto are repeatedly performed based on the judgment of the examiner or the processing unit 9. The examiner or the processing unit 9 determines the prescription value based on the response from the subject. Further, when the glare inspection is performed, the processing unit 9 turns on the glare light source 13n. In this state, awareness measurement is performed.

  Configuration of objective measurement system 14, configuration of subjective measurement system 15, configuration of alignment systems 16 and 17, configuration of kerato system, measurement principle of eye refractive power (ref), measurement principle of subjective measurement, measurement of corneal shape Since the principle is well-known, detailed description is abbreviate | omitted.

(Information processing system configuration)
The information processing system of the ophthalmologic apparatus 1 will be described. An example of the functional configuration of the information processing system of the ophthalmologic apparatus 1 is shown in FIG. The information processing system includes a control unit 100, an inspection unit 110, a display unit 130, an operation unit 140, and a communication unit 150. The control unit 100 controls the inspection unit 110, the display unit 130, and the communication unit 150.

(Inspection unit 110)
The inspection unit 110 can perform a plurality of different types of inspection. In the ophthalmologic apparatus 1 having the configuration shown in FIG. 2, a plurality of examinations including objective refraction measurement, subjective refraction measurement (distance examination, near-distance examination, contrast examination, glare examination, etc.) and corneal shape measurement are executed. be able to.

  The inspection unit 110 includes an optical system 111 and a moving mechanism 112. The optical system 111 optically acquires eye information. In this embodiment, the optical system 111 includes an observation system 12, a fixation target projection system 13, an objective measurement system 14, a subjective measurement system 15, and alignment systems 16 and 17, as shown in FIG. And an optical system. The moving mechanism 112 moves the optical system 111 relative to the eye to be examined. In this embodiment, the moving mechanism 112 is a mechanism that drives the optical system 111 and an optical member that constitutes the optical system 111, and an actuator that generates a driving force that can be controlled by the control unit 100, and this driving force is transmitted to the optical system. 111 and a member that transmits to an optical member constituting the optical system 111. Moreover, the test | inspection part 110 may include the function which calculates | requires a test result by analyzing the data acquired by the optical system. In that case, the inspection unit 110 includes at least a part of the processing unit 9 shown in FIG.

(Display unit 130, operation unit 140)
The display unit 130 displays information under the control of the control unit 100. The display unit 130 includes the display unit 10 shown in FIG.

  The operation unit 140 is used for operating the ophthalmologic apparatus 1. The operation unit 140 includes various hardware keys (joystick 8, buttons, switches, etc.) provided in the ophthalmologic apparatus 1. The operation unit 140 includes various software keys (buttons, icons, menus, etc.) displayed on the touch panel display screen 10a.

  At least a part of the display unit 130 and the operation unit 140 may be integrally configured. A typical example is a touch panel display screen 10a.

(Communication unit 150)
The communication unit 150 has a function for communicating with the external device 11 shown in FIG. The communication unit 150 is provided in the processing unit 9, for example. The communication unit 150 has a configuration corresponding to the form of communication with the external device 11.

(Control unit 100)
The information processing system is configured around the control unit 100. The control unit 100 executes various types of information processing such as arithmetic processing and control processing. The control unit 100 includes at least a part of the processing unit 9 shown in FIG. The control unit 100 includes a position specifying unit 101, a positioning unit 102, a determination unit 103, a storage unit 104, and a display control unit 105. Storage unit 104 includes a pattern storage unit 104A and a position storage unit 104B.

(Position specifying unit 101)
The position specifying unit 101 specifies a target position for alignment with respect to the eye E. The position designation unit 101 can designate a target position corresponding to the position designated by the user using the operation unit 140. For example, the user can specify the target position on the anterior segment image of the eye to be examined displayed on the display unit 130. The position specifying unit 101 is a second coordinate system (control coordinates by the positioning unit 102) in which the position specified by the user in a predetermined first coordinate system (display coordinate system of the display unit 130) is defined. The position after conversion is stored in the storage unit 104 or the like as a target position for alignment.

  In addition, the position specifying unit 101 can specify a target position corresponding to the position stored in advance in the storage unit 104. For example, the position specifying unit 101 reads the position stored in advance in the storage unit 104, converts the read position to a position in the second coordinate system as necessary, and converts the position in the second coordinate system to the alignment position. The target position is stored in the storage unit 104 or the like.

(Alignment unit 102)
The alignment unit 102 controls the moving mechanism 112 so that the position of the optical system 111 is aligned with the target position specified by the position specifying unit 101. For example, when the target position is designated by the user using the operation unit 140, the positioning unit 102 moves the moving mechanism 112 so as to align the position of the optical system 111 with the target position designated by the user using the operation unit 140. To control. As a specific example, the alignment unit 102 controls the moving mechanism 112 so that the deviation amount between the target position in the second coordinate system converted by the position specifying unit 101 and the current position of the optical system 111 is canceled. The optical system 111 is moved.

  Also, two or more target positions and their order may be designated by the user using the operation unit 140. In this case, the alignment unit 102 sequentially aligns the position of the optical system 111 with two or more target positions in the order specified by the user using the operation unit 140 (or by the control unit 100 according to a predetermined algorithm). It is possible to control the moving mechanism step by step. At each stage of control of the moving mechanism 112, the eye information is acquired by the optical system 111.

  The alignment unit 102 can control the moving mechanism 112 so that the position of the optical system 111 is aligned with the target position stored in advance in the storage unit 104. For example, the control unit 100 converts the position specified by the user using the operation unit 140 into a position in the second coordinate system, and causes the storage unit 104 to store the converted target position. The alignment unit 102 controls the moving mechanism 112 so that the position of the optical system 111 is aligned with the target position stored in the storage unit 104. As a specific example, the alignment unit 102 controls the moving mechanism 112 so that the deviation amount between the target position in the second coordinate system read from the storage unit 104 and the current position of the optical system 111 is canceled. The optical system 111 is moved. The storage unit 104 stores a position in the first coordinate system, and the alignment unit 102 converts the position into a target position in the second coordinate system, and the converted target position and the current position of the optical system 111. The optical system 111 may be moved by controlling the moving mechanism 112 so that the deviation amount is canceled.

  The alignment unit 102 can control the moving mechanism 112 step by step so that the position of the optical system 111 is sequentially aligned with respect to two or more target positions stored in advance in the storage unit 104. At each stage of control of the moving mechanism 112, the eye information is acquired by the optical system 111.

(Determination unit 103)
The determination unit 103 is subject eye information (measurement value, examination value, or measurement value (information on eye to be examined) acquired by the optical system 111 that has been aligned with a predetermined target position (first target position). It is determined whether or not the value obtained by (inspection value) is an error. The predetermined target position (first target position) includes a default target position (for example, a pupil center of gravity position or a corneal vertex position), a target position specified by the user using the operation unit 140, or 2 specified in advance. There is one of the above target positions.

  The determination unit 103 has a low intensity of the return light from the anterior eye part or the fundus of the light irradiated to the eye to be examined by the optical system 111, and an error in the eye information to be examined acquired by the optical system 111 is equal to or greater than a predetermined threshold value. When it is determined that the subject eye information is an error. For example, when the intensity of the return light from the anterior eye part or the fundus of the light irradiated to the eye to be examined by the optical system 111 is equal to or lower than the first threshold, the determination unit 103 acquires the eye information to be obtained by the optical system 111. Can be determined to be an error. Further, the determination unit 103 acquires, for example, an image shape, an image contour shape, and an image contrast by analyzing an image (ring image or the like) detected by the image sensor 12g, and based on the acquired information. Thus, it is possible to determine whether the eye information acquired by the optical system 111 is an error.

(Storage unit 104)
The storage unit 104 stores various computer programs and data. The computer program includes a calculation program and a control program for causing the ophthalmologic apparatus 1 to execute various examinations. The data includes data used in various tests. Examples of such data include target position pattern information and acquired position information.

(Target position pattern information)
The target position pattern information is information indicating an array of two or more target positions (target position pattern). The target position pattern information may further include a designation order of two or more target positions. The target position pattern information is generated in advance and is stored in the pattern storage unit 104A by the control unit 100. The control unit 100 can sequentially specify the target positions based on the target position pattern information stored in the pattern storage unit 104A. In addition, when target position pattern information does not include said designation | designated order, a user or the control part 100 can set a designation | designated order.

(Acquisition position information)
The acquired position information is information indicating the position of the optical system 111 when the subject eye information has been acquired in the past for the subject eye. The acquired position information is generally considered to have a high possibility of acquiring highly accurate eye information according to the type of eye disease and the attributes of the subject (eye to be examined) regardless of the eye to be examined. It may be information indicating the position (default position) of the optical system 111 to be used. The acquired position information is generated in advance and stored in the position storage unit 104B by the control unit 100. The control unit 100 can specify the target position based on the acquired position information stored in the position storage unit 104B. Moreover, the control part 100 can designate a target position (and its order) based on target position pattern information and acquisition position information. For example, it is possible to specify a plurality of target positions including at least one of the target positions indicated in the target position pattern information and a target position based on the acquired position information.

(Display control unit 105)
The display control unit 105 displays various information on the display unit 130. In this embodiment, the display control unit 105 causes the display unit 130 (display unit 10) having the touch panel display screen 10a to display a target position image at a position corresponding to the target position on the display screen 10a. The display control unit 105 may further display the alignment mark AL on the display unit 130. Further, the display control unit 105 may further display an image of the eye to be examined on the display unit 130. The display control unit 105 may display the target position image on the image of the eye to be examined. Examples of the eye image include a real-time image of the eye to be examined, an image of the eye to be examined acquired in the past, an image of the eye to be registered in advance, and an image (schematic diagram) schematically representing the eye to be examined. The real-time image of the eye to be examined may be an anterior segment image obtained from the detection result of the image sensor 12g.

  FIG. 6 schematically shows an example of the display screen 10a according to the embodiment. In FIG. 6, the same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  When the target position is designated by the user using the operation unit 140, for example, the control unit 100 sets an operable region where the user can perform a touch operation in the display screen 10a on which the anterior segment image E ′ is displayed. To do. The display control unit 105 displays the operation image AR corresponding to the operable region set by the control unit 100. For example, as shown in FIG. 6, the operation image AR includes an operation region image TR representing the operable region, a target position image T, a center position image CN corresponding to the center position of the operable region, and the like. For example, the control unit 100 identifies the pupil centroid position or the corneal vertex position by analyzing the image of the eye to be examined, and performs tracking on the identified pupil centroid position or corneal vertex position. Based on the tracking control by the control unit 100, the display control unit 105 can display the center position image CN so that the center position of the operable region matches the pupil barycenter position or the corneal apex position.

  The user can move the target position corresponding to the target position image T in the XY directions by moving the target position image T in the left-right direction and the up-down direction by a touch operation (for example, a drag operation).

  Further, the operation image AR may include operation keys UK and DK for moving the position of the target position in the front-rear direction (Z direction) as shown in FIG. The user can move the target position in the Z direction by a touch operation on the operation keys UK and DK.

  Furthermore, as shown in FIG. 6, the display control unit 105 can display an image of the eye to be examined (anterior eye image E ′) on the display screen 10a. The display control unit 105 displays a target position image T ′ indicating a position on the anterior segment image E ′ corresponding to the position of the target position image T and an alignment mark AL centered on the target position image T ′. Display on E '. In addition, the display control unit 105 displays the center position image CN ′ at a position on the anterior segment image E ′ corresponding to the position of the center position image CN.

  Note that the display control unit 105 may display only the operation image AR without displaying the anterior segment image E ′ on the display screen 10a. Further, the display control unit 105 may display the anterior segment image E ′ on the display screen 10a without displaying the operation image AR on the display screen 10a. In this case, as shown in FIG. 7, the display control unit 105 displays the target position image T ′ on the anterior segment image E ′ and displays the operation keys UK and DK. The user can move the target position corresponding to the target position image T in the XY directions by moving the target position image T ′ in the horizontal direction and the vertical direction by a touch operation (for example, a drag operation). The user can move the target position in the Z direction by touching the operation keys UK and DK.

  The position specifying unit 101 uses the operation unit 140 (in FIG. 6 and FIG. 7, the touch-panel display screen 10a) by any one of the methods described above to determine the target position X based on the position of the target position image T. By specifying coordinates in the direction, the Y direction, and the Z direction, the target position can be specified.

[Operation example]
The operation of the ophthalmologic apparatus 1 will be described.

  FIG. 8 shows a flowchart of an operation example of the ophthalmologic apparatus 1. FIG. 8 shows an operation example when the refractive power is acquired as the eye information in the ophthalmologic apparatus 1 described above.

(S1)
First, when the user turns on the power of the ophthalmologic apparatus 1, puts the face of the subject on the face receiving unit 5, and instructs the start of measurement using the operation unit 140, the ophthalmologic apparatus 1 causes the fixation target projection system 13 ( The LED light source 13a of the subjective measurement system 15) is turned on. The anterior eye portion of the eye E is illuminated by turning on the LED light source 13a. By illuminating the anterior segment, an anterior segment image is formed on the imaging surface of the imaging element 12g of the observation system 12, and the anterior segment image is stored in a frame memory (not shown) of the processing unit 9. The ophthalmologic apparatus 1 displays the anterior ocular segment image E ′ on the display screen 10 a of the display unit 10.

(S2)
Subsequently, the ophthalmologic apparatus 1 performs auto alignment with respect to the default target position. That is, the ophthalmologic apparatus 1 first turns on the alignment light source 17a of the alignment system 17 and projects the parallel light flux converted by the projection lens 17b onto the eye E to be aligned in order to perform alignment in the XY directions. The parallel light flux projected onto the eye E is reflected by the cornea C of the eye E, and the index image Br is projected onto the image sensor 12g in the observation system 12. This index image Br is displayed together with the anterior segment image E ′ as shown in FIG.

  The control unit 100 analyzes the anterior ocular segment image stored in the frame memory in S1 by a known method, and specifies the pupil barycentric position or the corneal apex position of the eye E as the default target position. The alignment unit 102 controls the moving mechanism 112 to align the position of the optical system 111 with the default target position specified by the control unit 100, and moves the optical system 111 in the XY directions. For example, the alignment unit 102 controls the moving mechanism 112 so that the deviation amount between the default target position specified by the control unit 100 and the position of the optical system 111 in the control coordinate system by the alignment unit 102 is canceled. The optical system 111 is moved. By doing so, alignment in the XY directions is completed.

(S3)
Next, the ophthalmologic apparatus 1 turns on the alignment light source 16a of the alignment system 16 and projects the parallel light beam converted by the projection lens 16b onto the eye E to perform alignment in the Z direction. The parallel light flux projected onto the eye E is reflected by the cornea C of the eye E, and two index images Lr1 and Lr2 are projected onto the image sensor 12g in the observation system 12. The index images Lr1 and Lr2 are displayed together with the anterior segment image E ′ as shown in FIG.

  The alignment unit 102 controls the moving mechanism 112 to align the position of the optical system 111 with the default target position specified by the control unit 100, and moves the optical system 111 in the Z direction. For example, the alignment unit 102 moves the optical system 111 by controlling the moving mechanism 112 so that the index images Lr1 and Lr2 have a predetermined positional relationship. As a specific example, the alignment unit 102 controls the actuator so that the deviation amount between the target position where the index images Lr1 and Lr2 have a predetermined positional relationship and the coordinate position in the Z direction of the optical system 111 is canceled. Thus, the head portion 4 is moved in the front-rear direction to perform front-rear alignment. By doing so, the alignment in the Z direction is completed.

(S4)
When the alignment in the Z direction in S3 is completed, the ophthalmologic apparatus 1 performs the refractive power measurement of the eye E and acquires the refractive power of the eye E as the eye information. In S4, for example, after the refractive power as the objective value is acquired by the objective measurement function, the refractive power as the subjective value is measured by the subjective measurement function based on the acquired refractive power (objective value). To do. Note that the corneal shape may be acquired by the above corneal shape measurement function before the objective measurement or after the subjective measurement. In addition, since the measurement principle of various types of eye information such as refractive power is well known, detailed description is omitted.

(S5)
Subsequently, the control unit 100 determines whether or not the refractive power acquired in S4 is an error by the determination unit 103. The determination unit 103 can determine whether or not the refractive power is an error as described above. When the determination unit 103 determines that the refractive power acquired in S4 is an error (S5: Y), the process of the ophthalmologic apparatus 1 proceeds to S6. When the determination unit 103 determines that the refractive power acquired in S4 is not an error (S5: N), the processing of the ophthalmologic apparatus 1 ends (end).

(S6)
When the determination unit 103 determines that the refractive power acquired in S4 is an error (S5: Y), the ophthalmologic apparatus 1 accepts designation of the target position by the user using the operation unit 140 as described above. That is, when the target position is designated by the user using the operation unit 140, the control unit 100 designates the target position for the eye E by the position designation unit 101 as described above in the position designation unit 101. In addition, the control unit 100 controls the eye E to be inspected based on the acquired position information indicating the position of the optical system 111 when the eye information is acquired in the past and stored in the position storage unit 104B. A target position may be designated for the target.

(S7)
Next, the ophthalmologic apparatus 1 performs alignment in the XY directions with respect to the target position designated in S6 as in S2. That is, the alignment unit 102 controls the moving mechanism 112 so that the position of the optical system 111 is aligned with the coordinate position in the X direction and the coordinate position in the Y direction of the target position specified in S6. By moving in the direction, alignment in the XY direction is performed with respect to the target position.

(S8)
Subsequently, the ophthalmologic apparatus 1 performs alignment in the Z direction with respect to the target position designated in S6 as in S2. That is, the alignment unit 102 performs alignment in the Z direction with respect to the target position by controlling the moving mechanism 112 based on the target position designated in S7 and moving the optical system 111 in the Z direction.

(S9)
When the alignment in the Z direction in S8 is completed, the ophthalmologic apparatus 1 performs the refractive power measurement of the eye E as in S4. Thus, the operation of the ophthalmologic apparatus 1 ends (END).

  In addition, after the measurement of S9 is completed, it may be determined whether the refractive power acquired in S9 is an error or not, as in S5. S6 to S9 may be repeated until it is determined that there is no error, or S6 to S9 may be repeated a predetermined number of times after it is determined that there is no error.

  In S6, the case where one target position is specified for the eye to be examined has been described. However, two or more target positions and their order are specified in advance, and after the measurement in S9 is completed, the position is specified in S6. The XY direction alignment and the Z direction alignment may be sequentially performed on the two or more target positions in the order specified by the unit 101, and the refractive power may be acquired at each step of the control. . The two or more target positions specified in advance are stored in advance in the pattern storage unit 104A as target position patterns, and the control unit 100 uses the position specifying unit 101 to target the eye E to be examined based on the target position patterns. The position may be specified sequentially. For example, as shown in FIG. 9, the target position can be specified in the order of P1, P2, P3, P4, and P5.

  In the above embodiment, the case where both the alignment in the XY direction and the alignment in the Z direction are performed with respect to the target position has been described. However, only one of the alignment in the XY direction and the alignment in the Z direction with respect to the target position is performed. You may make it perform.

(Action / Effect)
The operation and effect of the ophthalmologic apparatus according to the embodiment will be described.

  The ophthalmologic apparatus (for example, ophthalmologic apparatus 1) according to the embodiment includes an optical system (for example, the optical system 111), a moving mechanism (for example, the moving mechanism 112), a position specifying unit (for example, the position specifying unit 101), A control unit (for example, the control unit 100). The optical system irradiates the subject's eye (for example, the subject's eye E) with light, and acquires subject's eye information (for example, refractive power) based on the return light from the subject's eye. The moving mechanism moves the optical system relative to the eye to be examined. The position specifying unit specifies a target position for the eye to be examined. The control unit controls the moving mechanism so as to align the position of the optical system with the target position specified by the position specifying unit.

  According to such a configuration, since the moving mechanism can be controlled so as to align the position of the optical system with the target position specified by the position specifying unit, the optical system can be moved to the desired position without complicated work. Can be arranged in a short time and with high accuracy. As a result, the measurement time can be shortened and highly accurate eye information can be acquired even for an eye to be examined with a disease.

  The position designation unit designates two or more target positions and their order for the eye to be examined, and the control unit sequentially positions the optical system to the two or more target positions in the order designated by the position designation unit. The movement mechanism may be controlled step by step so that the eye information is matched, and the optical system may acquire the eye information to be examined at each step of the control.

  According to such a configuration, even when the state of the eye disease is unknown, it is possible to obtain highly accurate eye information within a short measurement time.

  Moreover, the ophthalmologic apparatus may include a pattern storage unit (for example, the pattern storage unit 104A). The pattern storage unit stores in advance target position pattern information indicating an array of two or more target positions. The position specifying unit sequentially specifies two or more target positions based on the target position pattern information stored in the pattern storage unit.

  According to such a configuration, it is not necessary for the user to specify the target position, and thus it is possible to obtain highly accurate eye information within a short measurement time while further simplifying the work.

  The ophthalmologic apparatus may include a determination unit (for example, the determination unit 103). The determination unit determines whether or not the first eye information of the eye to be examined acquired by the optical system that has been aligned with the first target position is an error. When the determination unit determines that the first eye information is an error, the control unit controls the moving mechanism to align the position of the optical system with the target position specified by the position specifying unit, and the optical system Then, new information on the eye to be examined (for example, new eye information to be examined) is acquired in a state where the position is aligned with the target position.

  According to such a configuration, it is possible to perform auto alignment with respect to the target position according to the eye information acquired after performing normal auto alignment. Accordingly, an ophthalmologic apparatus capable of acquiring eye information by performing auto-alignment on a subject eye that does not require designation of a target position (for example, a subject eye having no eye disease) can be provided.

  The ophthalmologic apparatus may include a position storage unit (for example, the position storage unit 104B). The position storage unit stores in advance the position of the optical system when the eye information is acquired in the past. The control unit controls the movement mechanism so that the position of the optical system is aligned with the position stored in the position storage unit, and the optical system is in a state in which the alignment is performed at the position stored in the position storage unit. Get information.

  According to such a configuration, for example, since it is possible to obtain new eye information at a position where the past eye information can be obtained for the eye to be examined, it is possible to repeatedly search for a target position for auto alignment. Can be greatly reduced.

  Further, the ophthalmologic apparatus may include a display control unit (for example, the display control unit 105) and an operation unit (for example, the operation unit 140). A display control part displays a target position image on a display means (for example, display part 130). The operation unit is used to move the target position image. The position specifying unit specifies a position corresponding to the position of the target position image specified using the operation unit as the target position.

  According to such a configuration, the target position can be specified while looking at the display means on which the target position image is displayed, so that the user can easily specify the desired target position.

  Further, the ophthalmologic apparatus may include a display control unit (for example, the display control unit 105) and an operation unit (for example, the operation unit 140). The display control unit displays the image of the eye to be examined on a display unit (for example, the display unit 130), and displays the target position image on the image of the eye to be examined. The operation unit is used to move the target position image. The position specifying unit specifies a position corresponding to the position of the target position image specified using the operation unit as the target position.

  According to such a configuration, the target position at which the target position image is displayed on the image of the eye to be examined can be specified, so that the user can easily specify the desired target position.

  The control unit also includes a first direction (for example, X direction) and a second direction (for example, Y direction) orthogonal to the optical axis of the optical system, and a third direction (for example, Z direction) parallel to the optical axis. Among them, the moving mechanism is moved at least in the first direction and the second direction.

  According to such a configuration, by performing alignment in a plane orthogonal to the optical axis of the optical system with respect to the target position or in the optical axis direction, high-precision eye information can be obtained even for a subject eye having a disease. It becomes possible to acquire.

(Modification)
The embodiment described above is merely an example for carrying out the present invention. A person who intends to implement the present invention can make arbitrary modifications, omissions, additions and the like within the scope of the present invention.

  For example, a first operation mode and a second operation mode may be provided as the operation mode of the ophthalmologic apparatus. In the first operation mode, the normal operation mode is performed in which the eye center position and the corneal apex position are automatically aligned to acquire the eye information. In the second operation mode, the flow shown in FIG. 8 or the target position can be specified. Set to operation mode.

  In the above-described embodiment, an ophthalmologic apparatus capable of at least subjective refraction measurement and further objective refraction measurement (and corneal shape measurement) has been described. However, the ophthalmologic apparatus to which the present invention is applicable is not limited to these. For example, an apparatus having an arbitrary function that can be used in the ophthalmic field, such as an axial length measurement function, an intraocular pressure measurement function, a fundus imaging function, an anterior ocular segment imaging function, an optical coherence tomography (OCT) function, and an ultrasonic examination function However, the present invention can be applied. The axial length measurement function is realized by an optical coherence tomometer or the like. The intraocular pressure measurement function is realized by a tonometer or the like. The fundus photographing function is realized by a fundus camera, a scanning ophthalmoscope (SLO), or the like. The anterior segment imaging function is realized by a slit lamp or the like. The OCT function is realized by an optical coherence tomograph or the like. The ultrasonic inspection function is realized by an ultrasonic diagnostic apparatus or the like. In addition, the present invention can be applied to an apparatus (multifunction machine) having two or more of such functions. Therefore, the eye information to be examined according to the embodiment may include the axial length, intraocular pressure, information about the fundus, information about the anterior segment, OCT information acquired by OCT, ultrasound information acquired by ultrasound, and the like. Good.

DESCRIPTION OF SYMBOLS 1 Ophthalmologic apparatus 100 Control part 101 Position designation part 102 Positioning part 103 Determination part 104 Storage part 104A Pattern storage part 104B Position storage part 105 Display control part 110 Inspection part 111 Optical system 112 Moving mechanism 130 Display part 140 Operation part 150 Communication part

Claims (8)

An optical system for irradiating the eye to be examined and acquiring eye information based on return light from the eye to be examined;
A moving mechanism for moving the optical system relative to the eye to be examined;
A position designating unit for designating a target position for the eye to be examined;
An ophthalmologic apparatus comprising: a control unit that controls the moving mechanism to align the position of the optical system with the target position specified by the position specifying unit. The position specifying unit specifies two or more target positions and their order with respect to the eye to be examined.
The control unit controls the moving mechanism step by step so that the position of the optical system is sequentially aligned with the two or more target positions in the order specified by the position specifying unit;
The ophthalmologic apparatus according to claim 1, wherein the optical system acquires the eye information to be examined at each stage of the control. A pattern storage unit that stores in advance target position pattern information indicating an array of the two or more target positions;
The ophthalmic apparatus according to claim 2, wherein the position specifying unit sequentially specifies the two or more target positions based on the target position pattern information stored in the pattern storage unit. A determination unit that determines whether or not the first eye information of the eye to be examined acquired by the optical system aligned with the first target position is an error;
When the determination unit determines that the first eye information is an error, the control unit controls the moving mechanism to align the position of the optical system with the target position specified by the position specifying unit. The optical system acquires new information of the eye to be examined in a state where the optical system is aligned with the target position. The ophthalmologic according to any one of claims 1 to 3, apparatus. A position storage unit that stores in advance the position of the optical system when the eye information is acquired in the past;
The control unit controls the moving mechanism to align the position of the optical system with the position stored in the position storage unit;
The said optical system acquires the said to-be-tested eye information in the state aligned to the position memorize | stored in the said position memory | storage part. The Claim 1 characterized by the above-mentioned. Ophthalmic equipment. A display control unit for displaying the target position image on the display means;
An operation unit for moving the target position image,
The said position designation | designated part designates the position corresponding to the position of the said target position image designated using the said operation part as said target position. The Claim 1 characterized by the above-mentioned. The ophthalmic device described. A display control unit for displaying an image of the eye to be examined on a display unit and displaying a target position image on the image of the eye to be examined;
An operation unit for moving the target position image,
The said position designation | designated part designates the position corresponding to the position of the said target position image designated using the said operation part as said target position. The Claim 1 characterized by the above-mentioned. The ophthalmic device described. The control unit moves the moving mechanism in at least the first direction and the second direction among a first direction and a second direction orthogonal to the optical axis of the optical system and a third direction parallel to the optical axis. The ophthalmic apparatus according to any one of claims 1 to 7, wherein

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