JP2017018191A - Standard eye module device and method for evaluating campimeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a standard eye module device that functions as a model eye capable of adapting to a functional evaluation of a campimeter adequately and appropriately.SOLUTION: A standard eye module device 1 used for a functional evaluation of a campimeter 10 for examining a visual field of a subject includes: an imaging unit 2 for capturing an image of a visual target presented by the campimeter 10; a control unit 3 by which visual recognition level data of a visual field model that serves as a reference is set, and which compares imaging data of the visual target obtained by the imaging unit 2 with the visual recognition level data and determines a state of visual recognition of the visual target in the visual field model; and an interface unit 4 for inputting the result of determination by the control unit 3 to the campimeter 10 as a response result for visual field examination by the campimeter 10.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a standard eye module device and a perimeter evaluation method.

  Visual field inspection is one of the visual inspections of the eyes. Visual field inspection is performed to diagnose visual field stenosis, visual field loss, etc. caused by glaucoma, retinal detachment, etc., and measure the range that can be seen around when a subject gazes at one point. Do by.

  One perimeter used in the visual field inspection is to inspect the visual field of a subject by presenting a visual target on a dome-shaped screen (see, for example, Patent Document 1). In this perimeter, when the subject's eyeball (hereinafter also referred to as “test eye”) is placed at the center of the dome and the subject observes the screen, for example, to what extent It is inspected whether the target is visible, or at which position the target is not visible.

  Another perimeter is one that presents a visual target to a subject using a flat display element (see, for example, Patent Document 2). In this perimeter, a flat display element is installed in a large case so as not to be affected by external light. Then, the subject's chin is supported from below and the subject's head is fixed, and in this state, the subject observes the display surface of the flat display element through the viewing hole on the side of the case.

JP 2012-20196 A Japanese Patent No. 4518077

As for the perimeter used in the visual field inspection, any of the above-mentioned types requires a desired inspection accuracy. For this purpose, it is conceivable to perform functional evaluation of the perimeter using a model eye having known optical characteristics, and to calibrate the perimeter so that the evaluation result obtained with the model eye is appropriate.
However, there is no model eye that is configured to be used in a perimeter and has optical characteristics assuming a human eye. In other words, the model eye existing as a conventional product cannot sufficiently and appropriately cope with the function evaluation for the perimeter.

  Therefore, the present invention provides a standard eye module device that functions as a model eye that can sufficiently and appropriately correspond to a function evaluation for a perimeter, and a perimeter evaluation method using the standard eye module device. With the goal.

The present invention has been devised to achieve the above object.
(First aspect)
The first aspect of the present invention is:
A standard eye module device used for functional evaluation of a perimeter for inspecting a subject's visual field,
An imaging unit for imaging a visual target presented by the perimeter;
Visibility level data of a visual field model serving as a reference is set, and imaging data of the visual target obtained by the imaging unit is compared with the visual recognition level data to determine the visual recognition state of the visual target in the visual field model. A control unit;
An interface unit for inputting a determination result in the control unit to the perimeter as a response result to a visual field inspection by the perimeter.
(Second aspect)
The second aspect of the present invention is:
The imaging unit according to the first aspect, wherein the imaging unit includes an optical system that satisfies a predetermined condition assuming the eye to be examined.
(Third aspect)
The third aspect of the present invention is:
The standard imaging module device according to the first or second aspect, wherein the imaging unit includes a logarithmic conversion type imaging device.
(Fourth aspect)
The fourth aspect of the present invention is:
In the standard eye module device according to any one of the first to third aspects, the visual recognition level data is configured by a visible luminance data group using a visual field of a normal eye or a diseased eye as a model. is there.
(5th aspect)
According to a fifth aspect of the present invention,
The interface unit is configured to be connected to at least one of a response switch included in the perimeter and a connection terminal for the response switch. According to any one of the first to fourth aspects, Standard eye module device.
(Sixth aspect)
The sixth aspect of the present invention is:
The standard eye module device according to any one of the first to fifth aspects, further comprising a fixing unit for fixing a position of the imaging unit with respect to the perimeter.
(Seventh aspect)
The seventh aspect of the present invention is
A perimeter evaluation method for evaluating the function of a perimeter for inspecting the visual field of a subject,
An imaging step of imaging a visual target presented by the perimeter;
A determination step of comparing the imaging data of the target obtained in the imaging step with the visual recognition level data of a visual field model serving as a reference set in advance to determine the visual recognition state of the visual target in the visual field model;
And a response step of inputting the determination result in the determination step to the perimeter as a response result to the visual field inspection by the perimeter.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to fully and appropriately respond | correspond to function evaluation with respect to a perimeter.

It is explanatory drawing which shows typically a specific example of schematic structure of an automatic perimeter. It is explanatory drawing which shows typically a specific example of schematic structure of a head mount type perimeter. It is explanatory drawing which shows typically a specific example of schematic structure of the standard eye module apparatus in one Embodiment of this invention. It is explanatory drawing which shows a specific example of the visual recognition level data set to the standard eye module apparatus in one Embodiment of this invention. It is a flowchart which shows a specific example of the procedure of the perimeter evaluation method in one Embodiment of this invention. It is explanatory drawing which shows a specific example of the sensitivity map obtained when the standard eye module apparatus in one Embodiment of this invention is used.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, description will be given in the following order.
1. 1. Overview of perimeter 2. Configuration of standard eye module device Perimeter evaluation method 4. 4. Effects of the present embodiment Modifications etc.

<1. Overview of perimeter>
First, a perimeter that is a target of function evaluation in the present embodiment will be described.

(Example of perimeter)
Here, as an example of the perimeter, an example in which a visual target is presented on a dome-shaped screen to inspect a subject's visual field will be described. As such a perimeter, an automatic perimeter that performs a static quantitative perimetry such as a Humphrey perimeter is known.

  The static quantitative visual field inspection performed by the automatic perimeter is performed as follows. First, a fixation target is presented at the center of the visual field, and the fixation target is fixed to the subject. Next, with the subject fixation on the fixation target, the visual target is presented at one point in the field of view and the brightness is gradually increased. Then, when the target has a certain brightness, the target can be seen from the subject. Therefore, the value corresponding to the brightness when the subject can see the target is set as the retina sensitivity at the point where the target is presented at that time. Then, the same measurement is performed for each point in the field of view, thereby quantitatively examining the difference in retinal sensitivity in the field of view and creating a map.

An automatic perimeter that performs a static quantitative visual field inspection is configured as shown in FIG.
FIG. 1 is an explanatory diagram schematically showing a specific example of a schematic configuration of an automatic perimeter.
The automatic perimeter 10 includes a hemispherical field dome 11 in the main body. The visual field dome 11 is configured such that a visual field measurement target (not shown) can be freely projected onto an arbitrary position in the dome. A fixture 12 such as a chin rest is provided on the front side of the main body so that the face 50 of the subject is fixed at a position facing the visual field dome 11. Furthermore, a control unit 13 is provided inside the main body, and a response switch 14 operated by the subject is connected to the control unit 13.

  The “target” presented in the dome is displayed in order to stimulate the eyeball of the subject with light when examining the visual field of the subject. There are no particular restrictions on the size, shape, etc. of the visual target. For example, when glaucoma is examined, a point of light is displayed as a target with a predetermined size, and the position of the point of light is changed to examine the presence or absence of the missing visual field and the location of the defect (specification). can do.

In the automatic perimeter 10 having such a configuration, the response switch 14 is held in the hand of the subject while the subject's face 50 is fixed to the position facing the visual field dome 11 by the fixture 12. Next, based on a command from the control unit 13, a fixation target is displayed at a predetermined position in the visual field dome 11 (for example, the center of the dome) to cause the subject to fixate, and in that state, the visual field is displayed at an arbitrary point in the dome. Display a test target. At this time, first, a visual target is displayed with a luminance that can be seen if it is normal according to the age of the subject. Then, the retina of the subject responds to the light stimulus, and the target can be seen from the subject. For this reason, when the visual target becomes visible from the subject, the subject presses the response switch 14 as the reaction. When the subject presses the response switch 14, an ON signal is sent to the control unit 13. When there is a reaction from the subject, the brightness of the displayed target is decreased by a predetermined unit (for example, 4 dB (decibel)). Then, when the subject's reaction ceases, a target with a brightness that is brighter by a predetermined unit (for example, 2 dB) is displayed, and the brightness of the point of the target when the subject's reaction occurs is displayed. Let the corresponding value be the sensitivity of the retina at that point. By performing such measurement for each point while randomly changing arbitrary points, the control unit 13 examines the difference in retinal sensitivity in the field of view quantitatively and creates a retinal sensitivity map.
The automatic perimeter 10 performs a static quantitative visual field inspection on the subject in the above procedure.

  In addition to the automatic perimeter 10 described above, the perimeter that presents the target on the dome-shaped screen and inspects the visual field of the subject, for example, a dynamic quantitative visual field inspection such as a Goldman perimeter An automatic perimeter is known. The details of the dynamic quantitative visual field inspection and the automatic perimeter for performing the dynamic quantitative visual field inspection are well known, so the description thereof is omitted here, but such an automatic perimeter is also described above. Similar to the automatic perimeter 10 that performs a static quantitative visual field inspection, this embodiment can be a target of functional evaluation, which will be described in detail later.

(Other examples of perimeter)
Next, another example of the perimeter will be described in which a visual target is presented to the subject using a flat display element to examine the subject's visual field. As such a perimeter, for example, there is a head-mounted perimeter that is used by being mounted on the head of a subject.

The head mount type perimeter is configured as shown in FIG.
FIG. 2 is an explanatory diagram schematically showing a specific example of a schematic configuration of a head-mounted perimeter.
The head-mounted perimeter includes an apparatus main body 20, an attachment tool 31 mechanically connected to the apparatus main body 20, and a control unit 32 attached to the attachment tool 31. Further, the perimeter includes a response switch (not shown) that can be placed near the subject.

  Since the apparatus main body 20 performs the examination separately with the left eye 51L and the right eye 51R of the subject 50, the internal space is divided into left and right. In one internal space, a flat display element 21L and a display optical system 22L are provided. In the other internal space, a flat display element 21R and a display optical system 22R are provided. The display element 21L and the display optical system 22L are provided to inspect the left eye 51L of the subject 50. The display element 21R and the display optical system 22R are provided to inspect the right eye 51R of the subject 50.

  The display elements 21L and 21R present a target to the eyeballs 51L and 51R using a flat display surface. For example, a liquid crystal display element having a backlight or a self-luminous organic EL (Electro Luminescence). The display element is used. The display surfaces of the display elements 21L and 21R have a configuration in which a large number of pixels are arranged in a matrix. The display elements 21L and 21R are connected to the control unit 32. When an image (including a visual target) is actually displayed on the display surface, the display elements 21L and 21R are displayed in units of pixels based on an instruction from the control unit 32. Display and non-display (ON / OFF) can be controlled. Thereby, the display elements 21L and 21R can present, for example, a cross-shaped fixed target or a stimulus target having a predetermined brightness (luminance) for visual field inspection as a target.

  The display optical systems 22L and 22R are for guiding light from the visual target to the retina of the eyeballs 51L and 51R of the subject 50. Therefore, the display optical systems 22L and 22R include a plurality of lens groups arranged on the optical axis between the eyeball position where the eyeballs 51L and 51R of the subject 50 are disposed and the display surfaces of the display elements 21L and 21R. (Not shown) and a mirror (not shown) disposed on the optical axis as necessary.

  In the internal space of the apparatus main body 20, in addition to the display elements 21L and 21R and the display optical systems 22L and 22R, an observation optical system (not shown) for observing the eyeballs 51L and 51R of the subject 50 is provided. An imaging device (not shown) that images the eyeballs 51L and 51R of the subject 50 through this observation optical system, and an infrared light source (not shown) that irradiates the eyeballs 51L and 51R of the subject 50 with infrared rays. , May be provided.

  In the head mount type perimeter having such a configuration, in addition to the above-described static quantitative visual field inspection and dynamic quantitative visual field inspection, fundus visual field inspection (microperimetry), electroretinography (ERG) and others It is possible to perform the inspection. Here, the case where a static quantitative visual field inspection is performed is described as an example.

  The static quantitative visual field inspection is performed as follows. First, the apparatus main body 20 of the head-mounted perimeter is mounted on the head of the subject 50, and a response switch is provided in the hand of the subject 50. Next, based on an instruction from the control unit 32, the left eye 51L and the right eye 51R of the subject 50 are separately examined. Specifically, a fixation target is displayed on the display surface of one of the display elements 21L and 21R to cause the subject to fixate, and in this state, the visual target for visual field inspection is set at an arbitrary point on the display surface. Is displayed. At this time, first, a visual target is displayed with a luminance that can be seen if it is normal according to the age of the subject. Then, the retina of the subject responds to the light stimulus, and the target can be seen from the subject. For this reason, when the visual target becomes visible from the subject, the subject presses the response switch 14 as the reaction. When the subject presses the response switch 14, an ON signal is sent to the control unit 13. When there is a reaction from the subject, the brightness of the displayed target is decreased by a predetermined unit (for example, 4 dB (decibel)). Then, when the subject's reaction ceases, a target with a brightness that is brighter by a predetermined unit (for example, 2 dB) is displayed, and the brightness of the point of the target when the subject's reaction occurs is displayed. Let the corresponding value be the sensitivity of the retina at that point. By performing such measurement for each point while randomly changing arbitrary points, the control unit 13 examines the difference in retinal sensitivity in the field of view quantitatively and creates a retinal sensitivity map.

When the head-mounted perimeter is equipped with an observation optical system, an image sensor, and an infrared light source, an objective visual field inspection is performed instead of the subjective visual field inspection using the response switch as described above. It is also possible to do this. The objective visual field inspection is performed by utilizing the change in the size of the pupil of the subject (pupil diameter) according to the brightness of the target. Specifically, the state change of the eyeballs 51L and 51R when the retina of the subject responds to the light stimulus and the target is visible from the subject is imaged. The imaging of the eyeballs 51L and 51R is performed by irradiating infrared rays from an infrared light source toward the eyeballs 51L and 51R, and the resulting image light of the eyeballs 51L and 51R is connected to the imaging surface of the imaging device via the observation optical system. It is done by making it image. Incidentally, since the human retina has no sensitivity to infrared rays, it does not affect the state changes of the eyeballs 51L and 51R.
Image data of the eyeballs 51 </ b> L and 51 </ b> R captured using the image sensor is captured by the control unit 32. At this time, the control unit 32 determines whether the pupil diameter of the subject has changed (enlarged or reduced) in response to the brightness of the target in the process of gradually decreasing or increasing the brightness of the target. Is determined based on image data sent from the image sensor. When determining that the pupil diameter of the subject has changed, the control unit 32 sets the value corresponding to the brightness of the point of the target at that time as the sensitivity on the retina of that point. By performing such measurement automatically and successively for each point in the field of view, the control unit 32 quantitatively checks the difference in sensitivity on the retina in the field of view and automatically creates a sensitivity map on the retina. .

With the above-described procedure, the head-mounted perimeter performs a subjective visual field inspection or an objective visual field inspection for the subject.
Such a head-mounted perimeter can be a target for functional evaluation, which will be described later in detail in the present embodiment.

<2. Configuration of standard eye module device>
Next, a configuration of a standard eye module device used for function evaluation of the perimeter in the present embodiment will be described.
Here, a standard eye module device configured to perform functional evaluation of the automatic perimeter 10 that performs static quantitative visual field inspection will be described as an example.

FIG. 3 is an explanatory view schematically showing a specific example of the schematic configuration of the standard eye module device in the present embodiment.
The standard eye module device 1 is used for functional evaluation of the automatic perimeter 10, and is roughly configured to include an imaging unit 2, a control unit 3, and an interface unit 4.

(Imaging part)
The imaging unit 2 images the visual target 15 presented by the automatic perimeter 10 in place of the subject's eye. For this purpose, the imaging unit 2 includes at least an optical system 2a composed of one lens or a plurality of lens groups, and an imaging element 2b composed of a complementary metal oxide semiconductor (CMOS) sensor or a charge coupled device (CCD) sensor. ing.

In the optical system 2a, since the imaging unit 2 replaces the eye to be examined, a predetermined condition assuming the eye to be examined that the viewing angle is wide and the pupil size (F value) is equal to the pupil diameter is set. It is configured to meet. Specifically, the predetermined condition assuming the eye to be examined is configured to satisfy the following condition.
That is, the optical system 2a has a viewing angle (full angle) θ in the short side direction (vertical direction) as follows.
40 [°] <θ <120 [°] (1)
Further, in the optical system 2a, the relationship between the focal length f [mm] and the F value is as follows.
1.5 [mm] <f / F value <10.0 [mm] (2)
In addition, the optical system 2a may implement | achieve the optical characteristic that a peripheral region blurs like a human eye.

  The imaging device 2b is configured to have a characteristic that assumes the eye to be inspected and has a sensitivity band of about 0 to 40 in dB notation because the imaging unit 2 replaces the eye to be inspected. Specifically, it is constituted by a logarithmic conversion type image pickup device that realizes a so-called high dynamic range in which the output of the image pickup device 2b is proportional to the logarithm of the luminance of received light. Note that details of the logarithmic conversion type imaging device are well known, and thus the description thereof is omitted here.

  In the imaging unit 2 including the optical system 2a and the imaging element 2b as described above, a function for performing focus adjustment when imaging the visual target 15 is provided in at least one of the optical system 2a or the imaging element 2b.

  Further, the imaging unit 2 is provided with a fixing unit 2c for fixing the position of the imaging unit 2 with respect to the automatic perimeter 10 so that the imaging unit 2 can image the target 15 instead of the eye to be examined. ing. Examples of the fixing unit 2c include, but are not limited to, a tripod stand, and the imaging unit 2 is fixed at a position where the target 15 can be imaged instead of the eye to be examined. If there is, it may be configured using other known techniques.

(Control part)
The control unit 3 includes a computer device connected to the imaging unit 2 and the interface unit 4, and controls processing operations in the standard eye module device 1 when the function of the automatic perimeter 10 is evaluated. More specifically, the control unit 3 is configured by a computer device including a combination of a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), various interfaces, and the like. . The control unit 3 is configured to realize various functions by the CPU executing a predetermined program. The predetermined program for realizing each function is used by being installed in a computer device, but may be provided by being stored in a storage medium readable by the computer device prior to the installation, or It may be provided through a communication line connected to the computer device.

Functions realized by the control unit 3 include a data management function and a determination processing function.
The data management function is a function for setting visual level data of a visual field model that is a reference when performing the function evaluation of the automatic perimeter 10 and storing and holding the set visual level data. Details of the viewing level data managed by the data management function will be described later.
When the determination processing function receives imaging data of the target 15 obtained by the imaging unit 2 from the imaging unit 2, the determination processing function compares the imaging data with the viewing level data managed by the data management function, and the viewing level data is assumed. This is a function of determining the visual recognition state of the visual target 15 in the visual field model to be output and outputting the determination result to the interface unit 4.

(Interface part)
The interface unit 4 is composed of, for example, a manipulator that is connected to the response switch 14 of the automatic perimeter 10 and operates the response switch 14. The interface unit 4 operates the response switch 14 according to the output result from the determination processing function of the control unit 3. To do. That is, the interface unit 4 inputs the determination result by the determination processing function of the control unit 3 to the automatic perimeter 10 as a response result to the visual field inspection by the automatic perimeter 10. The interface unit 4 is not necessarily a manipulator or the like for operating the response switch 14 as long as it can input the determination result of the determination processing function of the control unit 3 to the automatic perimeter 10. It may be composed of a connector or the like directly connected to the connection terminal 16.

(Viewing level data)
Here, the viewing level data managed by the data management function of the control unit 3 will be described.
FIG. 4 is an explanatory diagram showing a specific example of the visual level data set in the standard eye module device in the present embodiment.

The visual recognition level data is data relating to a visual field model that serves as a reference when the function of the automatic perimeter 10 is evaluated. The visual field model is obtained by modeling the visual field of a normal eye or a diseased eye. The visual recognition level data is constituted by a set of numerical data that defines the luminance level that can be visually recognized in each partial region within the visual field for such a visual field model.
Specifically, as shown in the figure, the field of view of the visual field model is simulated as one two-dimensional coordinate plane, and multiple partial areas partitioned on the coordinate plane can be visually recognized in each partial area. Brightness level is defined by a value in dB (decibel). That is, the visual recognition level data is constituted by a visual recognition luminance data group using a visual field of a normal eye or a diseased eye as a model.
According to such visual recognition level data, the dB value of the luminance level defined for each partial region functions as a threshold for determining whether the visual field model can visually recognize the light incident on each partial region. It will be. If it is determined for each partial region whether or not the incident light can be visually recognized, the position, size, and brightness (luminance) of the light visually recognized by the visual field model can be recognized. .
In the visual recognition level data, the portion where the luminance level dB value is not defined corresponds to a portion outside the visual field range of the visual field model or a visual field defect portion. Further, the specified number of dB values of the luminance level on the two-dimensional coordinate plane is not particularly limited, and may be set as appropriate according to the resolution of the automatic perimeter 10 to be evaluated. .

  It is assumed that such visual level data is set and stored in advance in the data management function of the control unit 3 prior to the function evaluation of the automatic perimeter 10. The method for setting the viewing level data is not particularly limited, and may be performed using a known method. Further, regarding the data content of the visual level data to be set, for example, it may be created based on the test result of the automatic perimeter 10 for normal eyes or diseased eyes, but is not limited thereto. Anything created in advance may be used.

<3. Perimeter evaluation method>
Next, the function evaluation procedure of the automatic perimeter 10 performed using the standard eye module device 1 having the above-described configuration, that is, the procedure of the perimeter evaluation method in the present embodiment will be described.
FIG. 5 is a flowchart showing a specific example of the procedure of the perimeter evaluation method in the present embodiment.

  When evaluating the automatic perimeter 10, first, a preparation step (S 101) is performed. In the preparation step (S101), the imaging unit 2 is set at a position facing the visual field dome of the automatic perimeter 10 while using the fixing unit 2c. As a result, the imaging unit 2 can capture the visual target presented on the visual field dome of the automatic perimeter 10. Further, in the preparation step (S101), for example, if the interface unit 4 is a manipulator type, the interface unit 4 is connected to the response switch 14 of the automatic perimeter 10 so that the interface unit 4 can operate the response switch 14. To do. For example, if the interface unit 4 is a connector type, the interface unit 4 is connected to the connection terminal 16 for the response switch so that the interface unit 4 can input a signal to the automatic perimeter 10. In the control unit 3 connected to the imaging unit 2 and the interface unit 4, it is assumed that the visual field level data of the reference visual field model is already set at the stage of the preparation step (S101). As the viewing level data, information on the position, size, and brightness (luminance) of the target visually recognized by the visual field model is recorded. Such visual recognition level data is recorded in a table managed by the control unit 3, and the table (that is, the table for determining the target luminance) is adapted to each device (that is, the evaluation target). Is set to adapt to the automatic perimeter 10), and the background brightness (that is, the brightness of the background when presenting the target) is calibrated for each device. And

After the preparation step (S101), a target presentation step (S102) and an imaging step (S103) are performed.
In the visual target presentation step (S102), the visual target is presented by a technique that can be inspected by the automatic perimeter 10, and visual field inspection is started. The inspection method may be different for each apparatus (model) of the automatic perimeter 10 that performs the visual field inspection. Specifically, the position, brightness, size, order, etc. where the visual target is presented may differ depending on the algorithm for each device. Therefore, for example, in the case of the automatic perimeter 10 of the algorithm that randomly presents the target, the position, brightness, size, order, etc. of the target are presented at random.
Further, in the imaging step (S103), the imaging unit 2 images the visual target presented by the automatic perimeter 10. Then, the imaging data obtained by imaging is sent from the imaging unit 2 to the control unit 3. Based on such imaging data, the control unit 3 recognizes at which position on the surface of the visual field dome in the automatic perimeter 10 and how much brightness (light quantity) the target is presented. To get.

Thereafter, a determination step (S104) and a response step (S105) are performed.
In the determination step (S104), the control unit 3 compares the imaging data of the visual target obtained in the imaging step (S103) with the visual level data of the visual field model that is set as a reference in advance, so that the visual field in the visual field model is viewed. Judge the visibility of the mark. Specifically, the control unit 3 sets the brightness value (luminance value) of the target in the imaging data to the dB value of the luminance level specified in the visual recognition level data, and corresponds to the position of the target. This is compared with the dB value of the luminance level for the partial area. When the luminance value of the visual target in the imaging data exceeds the luminance level dB value in the visual recognition level data, the control unit 3 visually recognizes the visual target presented by the automatic perimeter 10 in the reference visual field model. Judge that it is possible to do.
In the response step (S105), the interface unit 4 sends the determination result in the determination step (S104) to the automatic perimeter 10 as the response result to the visual field inspection by the automatic perimeter 10 while following the instruction from the control unit 3. input. Specifically, the interface unit 4 is in a state where the magnitude of the luminance value of the visual target in the imaging data exceeds the dB value of the luminance level in the visual recognition level data, and the visual target can be visually recognized in the visual field model. When the control unit 3 determines, the response switch 14 of the automatic perimeter 10 is operated or a signal is input to the connection terminal 16 for the response switch while following the instruction from the control unit 3.

  When the interface unit 4 operates the response switch 14 or inputs a signal to the connection terminal 16, an ON signal is sent to the control unit of the automatic perimeter 10. Upon receiving this ON signal, the control unit of the automatic perimeter 10 determines that the brightness of the target point at that time was visible.

  The series of steps (S102 to S105) as described above are repeatedly performed by the automatic perimeter 10 and the standard eye module device 1 until the automatic perimeter 10 finishes presenting all the targets (S106). That is, the automatic perimeter 10 and the standard eye module device 1 repeatedly perform the same measurement for each point in the preset visual field.

When the presentation and measurement for all the targets are completed (S102 to S106), a result acquisition step (S107) is performed thereafter.
In the result acquisition step (S107), the control unit of the automatic perimeter 10 examines the difference in the retinal sensitivity in the visual field in the standard visual field model in the same procedure as in the normal visual field inspection, and Create a sensitivity map for the model and output the sensitivity map. The output of the sensitivity map may be a display output using a display device or a print output using a printer device.
FIG. 6 is an explanatory diagram showing a specific example of a sensitivity map sensitivity map obtained when the standard eye module device according to the present embodiment is used. By referring to a sensitivity map as shown in the figure, it is possible to recognize which position in the field of view and what degree of retinal sensitivity.
The automatic perimeter 10 performs a static quantitative visual field inspection on the visual field model provided by the standard eye module device 1 by the procedure as described above.

After the result acquisition step (S107), an evaluation step (S108) is performed.
In the evaluation step (S108), the operator of the automatic perimeter 10 and the standard eye module device 1 compares the sensitivity map obtained in the result acquisition step (S107) with the data content of the visual level data in the standard eye module device 1. Meanwhile, the inspection function of the automatic perimeter 10 is evaluated. Specifically, whether or not the inspection result by the automatic perimeter 10 specified by the sensitivity map conforms to the data content of the visual recognition level data, and if there is an error, what is the amount of error? Evaluate the validity of the test results. If the function evaluation of the automatic perimeter 10 is performed, for example, it is possible to calibrate the automatic perimeter 10 as necessary.

<4. Effects of this embodiment>
According to the standard eye module device 1 and perimeter evaluation method described in the present embodiment, the following effects can be obtained.

In this embodiment, the visual target presented by the perimeter is imaged, and the imaging data of the visual target obtained thereby is compared with the visual level data of the visual field model that is set as a reference in advance, so that the visual field in the visual field model is viewed. The visual recognition state of the target is determined, and the determination result is input to the perimeter as a response result to the visual field inspection by the perimeter. Therefore, the validity of the inspection result on the perimeter can be evaluated by judging whether or not the inspection result on the perimeter based on the input result is the data content of the visual level data. . In addition, by performing a function evaluation of the perimeter using a standard eye module device having known visual level data, the perimeter is calibrated so that the evaluation result obtained by the standard eye module device is appropriate. Is feasible.
Therefore, with the standard eye module device 1 and the perimeter evaluation method of the present embodiment, it is possible to evaluate the correctness of the inspection results and perform proper calibration for the perimeter used in the perimetry. It becomes possible, and it can respond sufficiently and appropriately to the function evaluation for the perimeter.

  Moreover, in this embodiment, the imaging part 2 which comprises the standard eye module apparatus 1 has the optical system 2a which satisfy | fills the predetermined conditions supposing the eye to be examined. Therefore, the standard eye module device 1 can function as a model eye having optical characteristics assuming a human eye, and is very effective in sufficiently and appropriately responding to the function evaluation for the perimeter. .

  Moreover, in this embodiment, the imaging part 2 which comprises the standard eye module apparatus 1 has a logarithm conversion type image sensor as the image sensor 2b. Even in this respect, the standard eye module device 1 can function as a model eye having optical characteristics assuming a human eye. It will be effective.

  In the present embodiment, the control unit 3 constituting the standard eye module device 1 is set with the visual level data configured by the visible luminance data group modeled on the visual field of the normal eye or the diseased eye, The visual recognition state of the visual target by the visual field model is determined using the visual recognition level data. In this way, if the visual recognition level data is configured by the visible luminance data group, it is possible to determine the visual recognition state of the visual target by comparing the numerical data for each position where the visual target is presented. Therefore, it is possible to facilitate and speed up the processing for the determination. In addition, it is possible to deal with either normal eyes or diseased eyes, depending on the setting of the respective visible brightness data constituting the visual level data. Also from these things, according to this embodiment, it can be said that it is very effective in responding sufficiently and appropriately to the function evaluation for the perimeter.

  Moreover, in this embodiment, the interface part 4 which comprises the standard eye module apparatus 1 is comprised so that it may connect with at least one of the response switch 14 of a perimeter, or the connection terminal 16 for response switches. Therefore, regardless of the configuration of the perimeter to be evaluated, the standard eye module device 1 side can flexibly cope with it. That is, even if the perimeter to be evaluated is an existing one, if it has a general configuration, it is possible to perform the function evaluation using the standard eye module device 1 as it is. Will be very convenient.

  Moreover, in this embodiment, the imaging part 2 which comprises the standard eye module apparatus 1 is provided with the fixing | fixed part 2c for fixing the position with respect to the perimeter of the said imaging part 2. FIG. Therefore, in the standard eye module device 1, the imaging unit 2 can capture the visual target instead of the eye to be examined. Also in this respect, it can be said that the present embodiment is very effective in sufficiently and appropriately supporting the function evaluation for the perimeter.

<5. Modified example>
The technical scope of the present invention is not limited to the contents of the above-described embodiment, and includes various modifications and improvements as long as a specific effect obtained by the constituent elements of the invention and combinations thereof can be derived. .

  For example, in the above-described embodiment, the automatic perimeter 10 that performs the static quantitative visual field inspection is described as an example in which the functional evaluation is performed using the standard eye module device 1, but the present invention is limited to this. Never happen. That is, it does not matter whether the perimeter to be evaluated in the present invention is a type that presents a visual target on a dome-shaped screen or a type that presents a visual target to a subject using a flat display element. . Similarly, it does not matter whether it is a static quantitative visual field inspection or a dynamic quantitative visual field inspection.

  In the above-described embodiment, the case where the index is presented randomly in the visual target presentation step (S102) has been described as an example, but the present invention is not limited to this. That is, the position, brightness, size, and order of presentation of the indices presented in the target presentation step (S102) are not particularly limited, and each presented index is not limited to any algorithm. The visual recognition state may be determined in the determination step (S104).

DESCRIPTION OF SYMBOLS 1 ... Standard eye module apparatus 2 ... Imaging part 2a ... Optical system 2b ... Imaging element 2c ... Fixed part 3 ... Control part 4 ... Interface part 10 ... Automatic perimeter

Claims (7)

A standard eye module device used for functional evaluation of a perimeter for inspecting a subject's visual field,
An imaging unit for imaging a visual target presented by the perimeter;
Visibility level data of a visual field model serving as a reference is set, and imaging data of the visual target obtained by the imaging unit is compared with the visual recognition level data to determine the visual recognition state of the visual target in the visual field model. A control unit;
A standard eye module device comprising: an interface unit configured to input a determination result in the control unit to the perimeter as a response result to a visual field inspection by the perimeter. The standard eye module device according to claim 1, wherein the imaging unit includes an optical system that satisfies a predetermined condition assuming an eye to be examined. The standard eye module device according to claim 1, wherein the imaging unit includes a logarithmic conversion type imaging device. The standard eye module device according to any one of claims 1 to 3, wherein the visual recognition level data is configured by a visible luminance data group using a visual field of a normal eye or a diseased eye as a model. 5. The interface according to claim 1, wherein the interface unit is configured to be connected to at least one of a response switch included in the perimeter and a connection terminal for the response switch. Standard eye module device. The standard eye module device according to any one of claims 1 to 5, further comprising a fixing unit for fixing a position of the imaging unit with respect to the perimeter. A perimeter evaluation method for evaluating the function of a perimeter for inspecting the visual field of a subject,
An imaging step of imaging a visual target presented by the perimeter;
A determination step of comparing the imaging data of the target obtained in the imaging step with the visual recognition level data of a visual field model serving as a reference set in advance to determine the visual recognition state of the visual target in the visual field model;
And a response step of inputting the determination result in the determination step to the perimeter as a response result to the visual field inspection by the perimeter.