Ophthalmic device control program

Abstract

To provide an ophthalmic device control program that can appropriately release the accommodation of the eye being examined. [Solution] An ophthalmic device control program executed in a control unit 40 that controls an ophthalmic device 1 comprising an eye refractive power measurement system 43 for objectively measuring the ocular characteristics of the eye E under examination, and a target projection system 42 for presenting a fixation target to the eye E under examination at a predetermined presentation position and creating a cloud over the eye E, wherein the control unit 40 is instructed to perform the following steps: an objective measurement step of changing the presentation position of the fixation target in a direction that increases the amount of cloud, causing the target projection system 42 to present the fixation target, and objectively measuring the ocular characteristics in a time series using the eye refractive power measurement system 43; and an estimation step of estimating the tension tendency of the eye under examination, which indicates the property of each eye under examination to cloud, based on the objective measurement results of the ocular characteristics measured in a time series.

Description

Technical Field

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[0001] The present invention relates to an ophthalmic device control program.

Background Art

[0002] Conventionally, an ophthalmic device is known that presents a fixation target at a predetermined presentation position to the test eye, applies a fog, continuously measures the spherical refractive power of the test eye while removing the accommodation of the test eye, and determines whether the accommodation of the test eye has been removed based on the measured spherical refractive power (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in children or examinees with a lot of myopia, the lens is tense even in distant vision, and may be in a state of so-called pseudomyopia. And in the state of pseudomyopia, it is difficult to release the accommodation of the test eye. Therefore, when presenting the fixation target at a uniform presentation position, even if the change in the spherical refractive power has converged, in fact, the accommodation of the test eye may not be completely released (the pseudomyopia may not be relieved). That is, there are individual differences in the presentation position of the fixation target for applying the fog necessary to release the accommodation of the test eye, and there is a problem that it is difficult to appropriately release the accommodation of the test eye.

[0005] The present invention has been made paying attention to the above problems, and an object thereof is to provide an ophthalmic device control program capable of appropriately releasing the accommodation of the test eye.

Means for Solving the Problems

[0007] With the ophthalmic device control program of the present invention configured in this way, the accommodation of the eye under examination can be appropriately released. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the overall configuration of the ophthalmic device of Example 1. [Figure 2] This figure shows the detailed configuration of the left measuring optical system of the ophthalmic device in Example 1. [Figure 3] This flowchart shows the flow of objective and subjective examinations performed in the control unit of Example 1. [Figure 4] This flowchart shows the flow of cloud and fog control performed in the control unit of Example 1. [Figure 5] This is the first example of a graph showing the relationship between cloud / fog volume and objective measurement results of ocular characteristics. [Figure 6] This is a second example of a graph showing the relationship between cloud / fog volume and objective measurement results of ocular characteristics. [Figure 7] This is an explanatory diagram showing the display unit of the ophthalmic device of Example 1. [Modes for carrying out the invention]

[0009] Hereinafter, embodiments for implementing the ophthalmic device control program of the present invention will be described based on Embodiment 1 shown in the drawings.

[0010] (Example 1) The ophthalmic device 1 of Example 1 is a binocular open-type ophthalmic device that can measure eye characteristics of both eyes simultaneously while the subject has both eyes open. Furthermore, with the ophthalmic device 1 of Example 1, it is also possible to measure eye characteristics of each eye individually by occluding one eye or turning off the fixation target.

[0011] As shown in Figure 1, the ophthalmic apparatus 1 of Example 1 comprises a support base 10, a measurement unit 20, an examiner controller 30, a control unit 40, and a subject controller (not shown). Hereafter, with respect to the subject, the left-right direction will be the X direction, the up-down direction (vertical direction) will be the Y direction, and the direction perpendicular to the X and Y directions (depth direction) will be the Z direction.

[0012] The support base 10 includes a support column 11 that rises from the floor and an eye examination table 12 supported by the support column 11. The eye examination table 12 is a platform for placing devices and tools used in eye examinations, such as the examiner's controller 30, and for supporting the posture of the subject. The eye examination table 12 may be supported by the support column 11 so as to be adjustable in the Y direction (height position).

[0013] The measuring unit 20 includes an arm 21, a measuring head 22, and a forehead rest 23. One end of the arm 21 is supported at the tip of the support column 11, and the other end extends from the support column 11 toward the front (towards the subject) along the Z direction, with the measuring head 22 attached to the tip. As a result, the measuring head 22 is suspended from the support column 11 via the arm 21 above the eye examination table 12. The arm 21 is also movable in the Y direction relative to the support column 11. The arm 21 may also be movable in the X and Z directions relative to the support column 11.

[0014] The measuring head 22 is the part that measures the ocular characteristics of the eye E under test. The measuring head 22 has a drive unit 22a and a pair of left and right measuring units 22L and 22R located below the drive unit 22a. Here, the left measuring unit 22L and the right measuring unit 22R are paired to correspond individually to the left and right eyes of the subject. The left measuring unit 22L incorporates a left measuring optical system 25L that measures the ocular characteristics of the subject's left eye E (left eye under test). The right measuring unit 22R incorporates a right measuring optical system 25R that measures the ocular characteristics of the subject's right eye E (right eye under test). The measurement results from the measuring head 22 are input to the control unit 40.

[0015] The drive unit 22a is a mechanism that individually drives the left measuring unit 22L and the right measuring unit 22R to move horizontally (in the X direction), move vertically (in the Y direction), rotate in the X direction, and rotate in the Y direction, respectively.

[0016] Furthermore, the ophthalmic device 1 of Example 1 can objectively and subjectively measure the ocular characteristics of the eye E under examination. In other words, the examiner can perform any objective and subjective examinations using the ophthalmic device 1. In objective examinations, light is shone onto the eye E under examination, and information about the eye E (ocular characteristics) is measured based on the detection of the reflected light. Here, objective examinations include measurements to acquire the ocular characteristics of the eye E under examination and imaging to acquire an image of the eye E under examination. Objective examinations include objective refraction measurement (refractive measurement), corneal topography measurement (keratometry), intraocular pressure measurement, fundus photography, tomographic imaging using optical coherence tomography (OCT), and measurements using OCT. In subjective examinations, a visual target is presented to the subject, and information about the eye E (ocular characteristics) is measured based on the subject's response to the presented visual target. Subjective examinations include subjective refraction measurements such as distance vision tests, intermediate vision tests, near vision tests, contrast tests, and glare tests, as well as visual field tests.

[0017] Therefore, as shown in FIG. 2, the left measurement optical system 25L and the right measurement optical system 25R built into the measurement head 22 include an observation system 41 for observing the anterior segment of the test eye E, a target projection system 42 for presenting a target to the test eye E, an eye refractive power measurement system 43 for measuring the eye characteristics of the test eye E, and a keratometry system 47 (left objective measurement system, right objective measurement system), etc. The detailed configurations of the left measurement optical system 25L and the right measurement optical system 25R will be described later.

[0018] The forehead rest 23 is provided in the measurement unit 20 and is disposed between the left measurement unit 22L and the right measurement unit 22R. The forehead rest 23 supports the subject's face by contacting a part (forehead) of the subject's face during the measurement of eye characteristics. That is, the subject facing the ophthalmic examination table 12 presses their forehead against the forehead rest 23 to stabilize the orientation and position of the face so that they do not move. The position adjustment of the forehead rest 23 is performed by moving the arm 21 in the Y direction with respect to the support column 11.

[0019] The examiner's controller 30 is an information processing device that receives an operation by the examiner and outputs a control signal to the control unit 40. The examiner's controller 30 is, for example, a tablet terminal, a smartphone, etc., is separated from the measurement unit 20, and can be carried by the examiner. Note that the examiner's controller 30 may be a notebook personal computer, a desktop personal computer, etc., or may be a controller dedicated to the ophthalmic device 1. The examiner's controller 30 exchanges information with the control unit 40 via wireless communication or network communication.

[0020] Further, as shown in FIG. 1, the examiner's controller 30 includes a display unit 31, an operation-side control unit (not shown), and an input button (not shown). The display unit 31 is a touch panel display provided on the surface of the examiner's controller 30, and an input button is set. The operation-side control unit consists of a microcomputer built into the examiner's controller 30. The operation-side control unit controls the image displayed on the display unit 31 based on the measurement result and the detection result transmitted from the control unit 40. Also, the operation-side control unit outputs a control signal corresponding to the operation on the input button to the control unit 40.

[0021] The control unit 40 is an information processing device provided below the ophthalmic examination table 12. Based on the control signal transmitted from the examiner controller 30, the control unit 40 comprehensively controls each part of the measurement unit 20 including the left measurement optical system 25L and the right measurement optical system 25R having an objective measurement optical system (eye refractive power measurement system 43, keratometry system 47), a visual target projection system 42, etc. Further, the control unit 40 transmits the measurement result of the eye characteristics of the subject eye E measured by the measurement head 22 to the examiner controller 30.

[0022] Also, when measuring eye characteristics by objective examination and subjective examination, as shown in FIG. 3, the control unit 40 first performs preliminary measurement (step S1), and then performs fog control (step S2), and then measures the eye characteristics by main measurement (step S3). The control unit 40 in the first embodiment controls the measurement unit 20 in fog control, changes the presentation position of the fixation target in the direction of increasing the fog amount, presents the fixation target to the subject eye E, and objectively measures the eye characteristics of the subject eye E in time series while applying fog to the subject eye E. Note that the "fog amount" is the amount (strength) of fog added to the subject eye E, and is expressed as a diopter conversion value indicating the presentation position of the fixation target. And the presentation position of the fixation target is determined according to the fog amount. That is, when increasing the fog amount, the control unit 40 changes (moves) the presentation position of the fixation target in the distant vision direction (plus side), and when reducing the fog amount, the control unit 40 changes (moves) the presentation position of the fixation target in the near vision direction (minus side).

[0023] Then, when performing fog control, the control unit 40 determines whether to continue changing the presentation position of the fixation target for the subject eye E, that is, whether to increase the fog amount and continue applying fog, based on the objective measurement results of the eye characteristics measured in time series. And when the fluctuation of the objective measurement results converges within a preset predetermined range, the control unit 40 ends the change of the presentation position of the fixation target. Also, when the fluctuation of the objective measurement results does not converge within the preset predetermined range, the control unit 40 further changes the presentation position in the direction of increasing the fog amount, increases the fog amount, and then continues to apply fog to the subject eye E.

[0024] Furthermore, when performing cloud control, the control unit 40 displays a graph showing the relationship between the amount of cloud when the fixation target is presented and the objective measurement results of eye characteristics measured over time (see Figures 5 and 6). Here, the graph G showing the relationship between the amount of cloud and objective measurement results is displayed on the display unit 31 of the examiner controller 30, as shown in Figure 7.

[0025] The detailed configurations of the left measuring optical system 25L and the right measuring optical system 25R will be described below based on Figure 2. Note that the left measuring optical system 25L and the right measuring optical system 25R have the same configuration. Therefore, the description of the right measuring optical system 25R will be omitted below, and only the left measuring optical system 25L will be described.

[0026] As shown in Figure 2, the left measurement optical system 25L includes an observation system 41, a target projection system 42, a subjective measurement optical system 44, a first alignment system 45, a second alignment system 46, and an example of an objective measurement optical system, an ocular refractive power measurement system 43 and a keratological system 47. Here, the subjective measurement optical system 44, the ocular refractive power measurement system 43, and the keratological system 47 are all measurement optical systems that measure the ocular characteristics of the eye E under examination.

[0027] The observation system 41 includes an objective lens 41a, a first dichroic filter 41b, a first half mirror 41c, a first relay lens 41d, a second dichroic filter 41e, an imaging lens 41f, and an image sensor (CCD) 41g.

[0028] In the observation system 41, the light beam reflected from the eye E (anterior segment) is imaged onto the image sensor 41g by the imaging lens 41f after passing through the objective lens 41a. As a result, an anterior segment image E' is formed on the image sensor 41g, onto which the keratinizing light beam, the light beam from the first alignment light source 45a, and the light beam from the second alignment light source 46a (bright spot image Br) are projected. The image sensor 41g captures the anterior segment image E' and acquires the image signal of the anterior segment image E'. The control unit 40 displays the anterior segment image E', etc., based on the image signal output from the image sensor 41g on the display unit 31 of the examiner controller 30.

[0029] A keratin system 47 is provided in front of the objective lens 41a. The keratin system 47 is an example of an objective measurement optical system and measures the corneal shape (radius of curvature) of the eye E under examination. The keratin system 47 has a keratin plate 47a and a keratin ring light source 47b. The keratin plate 47a is plate-shaped with a slit concentric with respect to the optical axis of the observation system 41 and is provided near the objective lens 41a. The keratin ring light source 47b is provided in accordance with the slit of the keratin plate 47a.

[0030] In the keratography system 47, the light beam from the lit keratography light source 47b passes through the slit in the keratography plate 47a, projecting a keratography light beam (a ring-shaped target for measuring corneal curvature) onto the eye E (cornea Ec) for measuring corneal shape. The keratography light beam is reflected by the cornea Ec of the eye E and is imaged onto the image sensor 41g by the observation system 41. As a result, the image sensor 41g detects (receives) an image of the ring-shaped keratography light beam. The control unit 40 displays the image of the keratography light beam detected by the image sensor 41g on the display unit 31. Furthermore, the control unit 40 measures the corneal shape (radius of curvature) of the eye E using a well-known method based on the image signal detected by the image sensor 41g.

[0031] A first alignment system 45 is provided behind the keratin system 47 (keratin plate 47a). The first alignment system 45 aligns the optical system with respect to the eye E under examination in the direction along the optical axis of the observation system 41 (front-to-back direction, Z direction). The first alignment system 45 has a pair of first alignment light sources 45a and a pair of first projection lenses 45b.

[0032] In the first alignment system 45, the light beams from each first alignment light source 45a are made into parallel light beams by each first projection lens 45b, and the parallel light beams are projected onto the cornea Ec of the eye E under examination through alignment holes provided in the keratin plate 47a.

[0033] The control unit 40 or the examiner performs alignment in the direction along the optical axis (front-to-back direction) of the observation system 41 by moving the left measuring unit 22L (or right measuring unit 22R) in the front-to-back direction based on the bright spot (bright spot image Br) projected onto the cornea Ec. When performing alignment in the front-to-back direction, the control unit 40 or the examiner adjusts the position of the left measuring unit 22L (or right measuring unit 22R) so that the ratio of the distance between the two point images from the first alignment light source 45a on the image sensor 41g to the diameter of the keratling image falls within a predetermined range.

[0034] Furthermore, the observation system 41 is provided with a second alignment system (parallel optical system) 46. The second alignment system 46 aligns the optical system with respect to the eye E under examination in directions perpendicular to the optical axis of the observation system 41 (up and down and left and right directions; Y direction and X direction). The second alignment system 46 has a second alignment light source 46a and a second projection lens 46b. The second alignment system 46 also shares a first half mirror 41c, a first dichroic filter 41b, and an objective lens 41a with the observation system 41.

[0035] In the second alignment system 46, the light beam from the second alignment light source (point light source) 46a is converted into a parallel light beam via the objective lens 41a and projected onto the cornea Ec of the eye E under examination. The parallel light beam projected from the second alignment system 46 onto the cornea Ec of the eye E under examination forms a bright spot of alignment light approximately midway between the corneal apex and the center of curvature of the corneal Ec.

[0036] The control unit 40 or the examiner moves the left measuring unit 22L (or the right measuring unit 22R) in the vertical or horizontal direction based on the bright spot (bright spot image Br) projected onto the cornea Ec, thereby performing alignment in a direction perpendicular to the optical axis of the observation system 41 (vertical direction, horizontal direction).

[0037] The target projection system 42 projects a target (fixation target) onto the fundus Ef of the eye under examination in order to fixate on and cloud the eye E. The subjective measurement optical system 44 also projects the target onto the eye under examination during subjective examination. In the ophthalmic device 1 of Example 1, the target projection system 42 and the subjective measurement optical system 44 share the same optical elements that constitute the optical system.

[0038] The target projection system 42 (subjective measurement optical system 44) includes a display 42a, a second half mirror 42b, a second relay lens 42c, a first reflective mirror 42d, a first focusing lens 42e, a third relay lens 42f, a first field lens 42g, a variable cross cylinder lens (VCC) 42h, a second reflective mirror 42i, and a third dichroic filter 42j. The target projection system 42 (subjective measurement optical system 44) also shares the first dichroic filter 41b and the objective lens 41a with the observation system 41. Furthermore, the target projection system 42 (subjective measurement optical system 44) has at least two glare light sources 42k that irradiate the eye E under examination with glare light at positions surrounding the optical axis via an optical path separate from the optical path leading to the display 42a, etc., for subjective examination.

[0039] The display 42a displays fixation targets and point targets as visual targets to fix the gaze when performing objective examinations or when applying fogging to the eye E under examination, or displays subjective test targets for subjectively examining the ocular characteristics of the eye E under examination (such as visual acuity values ​​and corrective powers (distance power, near power)). The display 42a can use electroluminescence (EL) or liquid crystal display (LCD) and is controlled by the control unit 40 to display any image. The display 42a is positioned in the optical path of the target projection system 42 (subjective measurement optical system 44) at a position conjugate to the fundus Ef of the eye E under examination.

[0040] The first focusing lens 42e is driven to move forward and backward along the optical axis by a drive motor (not shown) controlled by the control unit 40. The control unit 40 can shift the refractive index to the negative side by moving the first focusing lens 42e toward the eye under examination E. The control unit 40 can also shift the refractive index to the positive side (far viewing direction) by moving the first focusing lens 42e away from the eye under examination E. Therefore, the control unit 40 changes the presentation position of the target displayed on the display 42a by driving the first focusing lens 42e forward and backward, and changes the examination distance from the target presentation position to the eye under examination E.

[0041] Furthermore, the target projection system 42 (subjective measurement optical system 44) is equipped with a pinhole plate 42p at a position in the optical path that is approximately conjugate to the pupil of the eye E being examined (in the example shown in Figure 2, between the first field lens 42g and VCC 42h). The pinhole plate 42p is formed from a plate member with a through hole. The pinhole plate 42p is controlled by the control unit 40, which enables insertion into and removal from the optical path of the target projection system 42 (subjective measurement optical system 44). When the pinhole plate 42p is inserted into the optical path, the through hole is positioned on the optical axis. In addition, the pinhole plate 42p is inserted into the optical path during subjective examination, enabling a pinhole test to determine whether or not the eye E being examined can be corrected with glasses. Note that the pinhole plate 42p only needs to be positioned in the optical path that is approximately conjugate to the pupil of the eye E being examined, and is not limited to the configuration shown in Figure 2.

[0042] The visual targets displayed on the display 42a during subjective examinations are not particularly limited as long as they are used in optometry, and suitable examples include Landolt rings, Snellen targets, and E charts. The visual targets may be still images or moving images. The ophthalmic device 1 of Example 1 is equipped with a display 42a made of an LCD or the like, so that visual targets of the desired shape, form and contrast can be displayed at a predetermined examination distance, enabling multifaceted and thorough optometry. Furthermore, the ophthalmic device 1 of Example 1 is equipped with two displays 42a, each corresponding to the left and right eyes E under examination. Therefore, the ophthalmic device 1 can display visual targets that provide parallax in accordance with a predetermined examination distance (presentation position), and stereoscopic vision testing can be performed easily and precisely with a natural orientation of the visual axis.

[0043] Furthermore, in the target projection system 42, when applying a cloud to the eye E under examination, a fixation target (visual target) is presented to the eye E at a predetermined presentation position. The presentation position of the fixation target is set according to the amount of cloud (intensity of cloud) applied to the eye E under examination.

[0044] The refractive power measurement system 43 is an example of an objective measurement optical system and measures the refractive power of the eye E under examination. In Example 1, the refractive power measurement system 43 has the function of projecting a predetermined measurement pattern onto the fundus Ef of the eye E under examination and the function of detecting the image of the measurement pattern projected onto the fundus Ef. That is, the refractive power measurement system 43 has a ring-shaped light beam projection system 43A that projects a ring-shaped measurement pattern onto the fundus Ef of the eye E under examination, and a ring-shaped light beam receiving system 43B that detects (receives) the reflected light of the ring-shaped measurement pattern from the fundus Ef.

[0045] The ring-shaped light beam projection system 43A includes a reflector light source unit 43a, a fourth relay lens 43b, a pupil ring diaphragm 43c, a second field lens 43d, a perforated prism 43e, and a rotary prism 43f. The ring-shaped light beam projection system 43A also shares a third dichroic filter 42j with the target projection system 42 (subjective measurement optical system 44), and shares a first dichroic filter 41b and an objective lens 41a with the observation system 41. The reflector light source unit 43a includes, for example, a reflector measurement light source 43g using an LED, a collimator lens 43h, a conical prism 43i, and a ring pattern forming plate 43j. The reflector light source unit 43a is controlled by the control unit 40 and moves integrally along the optical axis of the eye refractive power measurement system 43.

[0046] The ring-shaped light beam receiving system 43B includes the hole 43p of the perforated prism 43e, the third field lens 43q, the third reflecting mirror 43r, the fifth relay lens 43s, the second focusing lens 43t, and the fourth reflecting mirror 43u. The ring-shaped light beam receiving system 43B shares the objective lens 41a, the first dichroic filter 41b, the second dichroic filter 41e, the imaging lens 41f, and the image sensor 41g with the observation system 41. Furthermore, the ring-shaped light beam receiving system 43B shares the third dichroic filter 42j with the target projection system 42 (self-awareness measurement optical system 44), and shares the rotary prism 43f and the perforated prism 43e with the ring-shaped light beam projection system 43A.

[0047] When measuring the refractive power of the eye E under examination using the eye refractive power measurement system 43, the control unit 40 first turns on the reflector measurement light source 43g. Then, the control unit 40 moves the reflector light source unit 43a of the ring-shaped light beam projection system 43A and the second focusing lens 43t of the ring-shaped light beam receiving system 43B in the optical axis direction. In the ring-shaped light beam projection system 43A, the reflector light source unit 43a emits a ring-shaped measurement pattern, which is then propagated through the fourth relay lens 43b, the pupil ring diaphragm 43c, and the second field lens 43d to the perforated prism 43e, where it is reflected by its reflective surface 43v and guided through the rotary prism 43f to the third dichroic filter 42j. The ring-shaped light beam projection system 43A projects a ring-shaped measurement pattern onto the fundus Ef of the eye E under examination by guiding its measurement pattern through the third dichroic filter 42j and the first dichroic filter 41b to the objective lens 41a.

[0048] The ring-shaped light beam receiving system 43B focuses the ring-shaped measurement pattern formed on the fundus Ef with the objective lens 41a, and directs it through the first dichroic filter 41b, the third dichroic filter 42j, and the rotary prism 43f to the hole 43p of the perforated prism 43e. Subsequently, the ring-shaped light beam receiving system 43B causes the measurement pattern to pass through the third field lens 43q, the third reflective mirror 43r, the fifth relay lens 43s, the second focusing lens 43t, the fourth reflective mirror 43u, the second dichroic filter 41e, and the imaging lens 41f, thereby forming an image on the image sensor 41g. As a result, the image sensor 41g detects the image of the ring-shaped measurement pattern, and the control unit 40 displays the image of the measurement pattern detected by the image sensor 41g on the display unit 31. The control unit 40 then measures the spherical power, cylindrical power, and axial angle as refractive power of the eye based on the image signal from the image sensor 41g using a well-known method.

[0049] The configurations of the refractive power measurement system 43, the first alignment system 45, the second alignment system 46, and the keratological system 47, as well as the measurement principles of refractive power (REF), subjective examination, and corneal shape (keratology), are publicly known, so a detailed explanation will be omitted.

[0050] The following describes the cloud and fog control process performed by the control unit 40 in Example 1, based on the flowchart shown in Figure 4.

[0051] As shown in Figure 3, cloud control (step S2) is performed between the preliminary measurement (step S1) and the main measurement (step S3) when conducting objective or subjective tests.

[0052] Here, "preliminary measurement" is the process of focusing the eye E under test at the clouding start position, and is performed, for example, in the following procedure. Specifically, the control unit 40 calculates the provisional spherical power S and astigmatism power C of the eye under test based on the captured ring image acquired using the eye refractive power measurement system 43. Then, based on the calculation results of the provisional spherical power S and astigmatism power C, the control unit 40 controls the second focusing lens 43t to move the focal position of the pattern light to a position corresponding to the equivalent spherical power (S + C / 2) (a position corresponding to the provisional far point: the clouding start position).

[0053] Furthermore, "this measurement" is a process for measuring a predetermined ocular characteristic for which the objective is to be measured. For example, when performing objective refraction measurement (refractive measurement), the following procedure is followed. Specifically, the control unit 40 projects a ring-shaped measurement pattern onto the fundus Ef of the eye E under cloud cover using the ring-shaped light beam projection system 43A. The control unit 40 then detects (receives) the reflected light of the ring-shaped measurement pattern from the fundus Ef using the ring-shaped light beam receiving system 43B, and measures the spherical power, cylindrical power, and axial angle as refractive power using a well-known method based on the image signal from the image sensor 41g.

[0054] Furthermore, the ophthalmic device 1 of Example 1 is a binocular open-type ophthalmic device capable of measuring eye characteristics in both eyes simultaneously. Therefore, each step of preliminary measurement, cloud control, and main measurement can be performed simultaneously on both the left and right eye E under examination.

[0055] Furthermore, in the ophthalmic device 1 of Example 1, the "amount of increase in cloud fog," the "predetermined amount of cloud fog," and the "threshold for judging fluctuations in objective measurement results" are predetermined when controlling cloud fog. The "amount of increase in cloud fog" is the amount of cloud fog to increase when changing the presentation position of the fixation target, for example, 0.25 diopters on the positive side (far gaze direction). The "predetermined amount of cloud fog" is the amount of cloud fog that triggers the judgment of whether or not the objective measurement results measured during cloud fog control have converged, and can be set arbitrarily. For example, the "predetermined amount of cloud fog" is 1.5 diopters on the positive side (far gaze direction) when the amount of cloud fog at the start of cloud fog is 0.0 diopters. The "threshold for judging fluctuations in objective measurement results" is a predetermined range for judging whether or not the objective measurement results measured during cloud fog control have converged, for example, ±0.1 diopters.

[0056] In step S201 of the fogging control, the control unit 40 changes the presentation position of the fixation target in a direction that increases the amount of fogging, and proceeds to step S202. Here, the amount by which the presentation position of the fixation target is changed is predetermined according to the "amount of increase in fogging". That is, the control unit 40 changes the presentation position of the fixation target from the currently set position to a position that increases the amount of fogging by a predetermined amount (for example, 0.25 diopters in the positive direction). As a result, the fixation target is moved to a position that increases the amount of fogging (a position shifted by 0.25 diopters in the positive direction). Note that the "amount of increase in fogging" (the amount of change in the presentation position of the fixation target) may be determined each time a change is made based on the objective measurement results of the ocular characteristics measured in step S202. As the presentation position of the fixation target is changed, the eye E under examination is subjected to fogging at the fixation target position with increased fogging.

[0057] In step S202, following the change in the presentation position of the fixation target and the increase in the amount of fogging performed in step S201, the control unit 40 objectively measures the ocular characteristics of the eye E being examined, that is, performs an objective examination, and proceeds to step S203. Here, the objective examination of the eye E being examined is, for example, an objective refraction measurement (ref measurement) performed using the ocular refractive power measurement system 43. As a result, the control unit 40 changes the presentation position of the fixation target in a direction that increases the amount of fogging and presents the fixation target while objectively measuring the ocular characteristics.

[0058] In step S203, following the objective examination in step S202, the control unit 40 displays a graph showing the relationship between the current amount of haze increased in step S201 and the objective measurement results of the ocular characteristics measured in step S202, and proceeds to step S204. Here, the graph G showing the relationship between the amount of haze and the objective measurement results may be shown by plotting values ​​as shown in Figure 5, or by connecting the plotted values ​​with a line as shown in Figure 6. Note that in Figure 6, in order to show that the objective measurement results differ for each subject, the results of multiple subjects are superimposed on a single graph G. Graph G is generated for each subject. Furthermore, graph G is displayed on the display unit 31 as shown in Figure 7. In addition, if the objective measurement results are shown in equivalent spherical power, for example, the range of astigmatism may be indicated on graph G.

[0059] In step S204, following the graph display in step S203, the control unit 40 determines whether the amount of fog at the time of the objective examination in step S202, i.e., the current amount of fog increased in step S201, has reached a preset "default amount of fog". If YES (the default amount of fog has been reached), proceed to step S205. If NO (the default amount of fog has not been reached), return to step S201.

[0060] If the process returns from step S204 to step S201, the control unit 40 changes the position of the fixation target again in a direction that increases the amount of fog. As a result, the eye E under examination is fogged again at the fixation target position where the amount of fog has increased further. Then, the process proceeds again to step S202, and the control unit 40 objectively measures the ocular characteristics of the eye under examination E. In other words, the change in the position of the fixation target and the subsequent objective examination are repeated until the amount of fog reaches a predetermined "default amount of fog". As a result, the control unit 40 objectively measures the ocular characteristics over time while presenting the fixation target by changing its position in a direction that increases the amount of fog.

[0061] In step S205, following the determination that the amount of fog in step S204 has reached a predetermined "default amount of fog," the control unit 40 decides whether or not to continue applying fog after changing the presentation position of the fixation target, based on the objective measurement results measured in step S202. In other words, in step S205, the control unit 40 determines whether or not the objective measurement results of the eye characteristics measured in step S202 have converged.

[0062] If the amount of variation in the objective measurement results is greater than a predetermined range (for example, ±0.1 diopters) between the last measurement and the measurement immediately preceding it (for example, subject 3 shown in Figure 6), the control unit 40 determines that the lens is tense and in a tense state where fogging is not sufficiently applied. In this case, the control unit 40 determines NO in step S205, stating that "the objective measurement results have not converged (fogging continues)," and returns to step S201. On the other hand, if the amount of variation in the objective measurement results is small between the last measurement and the measurement immediately preceding it (for example, if the amount of variation is within the predetermined range, for example, subjects 1 and 2 shown in Figure 6), the control unit 40 determines that the tension in the lens has eased and that fogging is sufficiently applied. In this case, the control unit 40 determines YES in step S205, stating that "the objective measurement results have converged (fogging ended)," and proceeds to step S206. Furthermore, the control unit 40 may analyze the fluctuations in the amount of cloud cover from the cloud cover start position and determine that "the objective measurement results have converged" if it estimates that the amount of change in the fluctuations in the amount of cloud cover has decreased.

[0063] Then, even if the process returns from step S205 to step S201, the control unit 40 changes the presentation position of the fixation target again in a direction that increases the amount of fog. The eye E under examination is then fogged again at the fixation target position where the amount of fog has increased further. Proceeding again to step S202, the control unit 40 objectively measures the ocular characteristics of the eye under examination E. In other words, the change in the presentation position of the fixation target and the accompanying objective examination are repeated until it is determined that the objective measurement results have converged. As a result, the control unit 40 objectively measures the ocular characteristics over time while presenting the fixation target by changing its presentation position in a direction that increases the amount of fog.

[0064] In step S206, following the determination that the objective measurement results in step S205 have converged, the control unit 40 estimates the tension tendency of the eye E measured in step S202 based on the objective measurement results of the ocular characteristics, notifies the examiner or the subject, and proceeds to the end. Here, the "tension tendency of the eye E measured" is information indicating how easily the eye E can readjust (the degree of relaxation of tension). The "tension tendency of the eye E measured" is determined from the amount of change in the objective measurement results from the start of the fogging process. The control unit 40 may estimate the tension tendency of the eye E under test as "prone to tension (insufficient fogging, low degree of remission, and easy readjustment)" if the amount of change in the objective measurement results from the start of fogging is greater than a predetermined amount (e.g., +0.5 diopters), or it may estimate the tension tendency of the eye E under test as "prone to tension (insufficient fogging, low degree of remission, and easy readjustment)" if the sum of the changes in the objective measurement results each time the fixation target position moves is greater than a predetermined amount (e.g., +1.0 diopters). Conversely, the control device 40 may estimate the tension tendency of the eye E under test as "less prone to tension (sufficiently relaxed and less prone to readjustment)" if the amount of change in the objective measurement results from the start of fogging is less than or equal to a predetermined amount (e.g., +0.5 diopters), or it may estimate the tension tendency of the eye E under test as "less prone to tension (sufficiently relaxed and less prone to readjustment)" if the sum of the changes in the objective measurement results each time the fixation target position moves is less than or equal to a predetermined amount (e.g., +1.0 diopter).

[0065] The "tension tendency of the eye under examination E" is notified by displaying it on the display unit 31 or by emitting an audible signal. Note that if the astigmatism of the eye under examination E is large, the depth of focus increases, which may affect the amount of variation in the objective measurement results. Therefore, if the astigmatism is large (for example, 1.0D or more), the astigmatism may also be notified.

[0066] The following describes the effects and benefits of the ophthalmic device 1 of Example 1.

[0067] In Example 1, the ophthalmic device 1 performs fogging control (step S2) between the preliminary measurement (step S1) and the main measurement (step S3) when measuring the ocular characteristics of the eye E under examination. Specifically, after performing the preliminary measurement (step S1), the control unit 40 changes the presentation position of the fixation target in a direction that increases the amount of fogging according to a predetermined "amount of increase in fogging" (step S201). As a result, the eye under examination E is covered with fogging with an increased amount of fogging, and the control unit 40 objectively measures the ocular characteristics of the eye under examination E in the state of fogging (step S202).

[0068] Next, the control unit 40 displays a graph showing the relationship between the amount of fog and the objective measurement results (step S203). Then, the control unit 40 determines whether the amount of fog has reached a "default amount of fog" (step S204). Furthermore, if the amount of fog has reached a "default amount of fog," the control unit 40 determines whether to change the presentation position of the fixation target and continue the fog, based on whether the objective measurement results have converged (step S205).

[0069] Then, when the objective measurement results converge (when it is determined that the fogging will not continue after changing the position of the fixation target), the control unit 40 estimates the tension tendency of the eye E being examined based on the objective measurement results and notifies the examiner or the subject (step S206). After that, the control unit 40 performs the measurement (step S3).

[0070] Furthermore, the control unit 40 repeatedly changes the position of the fixation target in a direction that increases the amount of cloud and fog, and performs objective tests, until the amount of cloud and fog reaches a "predetermined amount of cloud and fog" and the objective measurement results converge and it is determined that the change in the position of the fixation target should not be continued.

[0071] Thus, in the ophthalmic device 1 of Example 1, during the fog control (step S2), the fixation target is presented to the eye E under examination by changing the position of the fixation target in a direction that increases the amount of fog, and the eye characteristics are objectively measured over time while fog is applied to the eye E under examination. That is, the eye E under examination is fogged while the fixation target position is changed in a direction that increases the amount of fog, and at that time, the eye characteristics are objectively measured over time. Therefore, the control unit 40 can estimate the tension state of the eye E under examination based on the objective measurement results and apply additional fog as needed.

[0072] In other words, in the example shown in Figure 6, for example, in subject 1, shown by the solid line, there is no difference between the objective measurement value (equivalent spherical frequency) at a predetermined amount of fog at the start of fog application and the objective measurement value (equivalent spherical frequency) when the amount of fog is increased by 0.25 diopters from the amount of fog at the start of fog application. That is, in subject 1, when the fixation target is presented at the position where the amount of fog is the predetermined amount of fog application and fog is applied, the fluctuation of the objective measurement results is already within the predetermined range. Therefore, the control unit 40 can determine that "the objective measurement results have converged" when the fixation target is presented at the fog application start position, and the tension in subject eye E is relieved when the fixation target is presented at the fog application start position and fog is applied. For this reason, in the case of subject 1, when the amount of fog reaches the "predetermined amount of fog," the tension in subject eye E is relieved, and the control unit 40 can determine that additional fog by increasing the amount of fog is unnecessary.

[0073] Furthermore, in subject 2, shown by the dashed line in Figure 6, there is no difference between the objective measurement value (equivalent spherical frequency) when the amount of fog is increased by 1.0 diopter from the initial amount of fog and the objective measurement value (equivalent spherical frequency) when the amount of fog is increased by 1.25 diopters from the initial amount of fog. In other words, in subject 2, when a fixation target is presented at a position where the amount of fog increases by 1.0 diopter from the initial amount of fog and fog is applied, the fluctuation in the objective measurement results falls within a predetermined range. Therefore, in subject 2, the tension in the subject eye E is relieved when the fixation target is presented at a position where the amount of fog increases by 1.0 diopter from the initial amount of fog and fog is applied. For this reason, in the case of subject 2, when the amount of fog reaches the "specified amount of fog," the tension in the subject eye E is relieved, and the control unit 40 can determine that additional fog by increasing the amount of fog is unnecessary.

[0074] On the other hand, in subject 3, indicated by the dashed line in Figure 6, even when the position of the fixation target is gradually changed in a direction that increases the amount of fog, and the position of the fixation target is gradually moved to the positive side (far vision direction), the objective measurement value (equivalent spherical power) continues to fluctuate. Therefore, in subject 3, even when the fixation target is presented at a position where the amount of fog increases by +1.5 diopters from the amount of fog at the start of fog application and fog is applied, the fluctuation in the objective measurement results does not fall within the predetermined range, and it is not judged that "the objective measurement results have converged." For this reason, in the case of subject 3, even if the amount of fog reaches the "prescribed amount of fog," the tension in the subject's eye E does not ease, and the control unit 40 can determine that additional fog is necessary by further increasing the amount of fog.

[0075] As a result, the ophthalmic device 1 can appropriately release the accommodation of the eye E under examination, even in a state of pseudomyopia. Furthermore, the control unit 40 or the examiner can grasp the relationship between the fixation target presentation position and the objective measurement results in a time series. Therefore, the control unit 40 or the examiner can, for example, determine from the fixation target presentation position at the time when the objective measurement results converge how much fogging (fixation target position) caused the lens of the eye E under examination to relax, or determine whether pseudomyopia is present by whether or not the objective measurement results change in response to changes in the fixation target presentation position. In addition, the ophthalmic device 1 can be made to determine whether there is a possibility of insufficient fogging, etc., in response to changes in the objective measurement results.

[0076] Furthermore, in the ophthalmic device 1 of Example 1, the control unit 40 determines whether or not to continue the fogging after changing the presentation position of the fixation target, based on the objective measurement results of the eye characteristics measured in a time series (step S205). In other words, the ophthalmic device 1 determines whether or not to start the main measurement based on the objective measurement results of the eye characteristics measured in a time series during fogging control. This makes it possible to quickly start the next step (main measurement) at the timing when the appropriate fogging is applied to the eye E under examination, thereby preventing the examination time from becoming unnecessarily long and the burden on the subject from increasing unnecessarily.

[0077] Furthermore, in the ophthalmic device 1 of Example 1, the control unit 40 estimates and reports the tension tendency of the eye E under examination based on the objective measurement results of eye characteristics measured in a time series (step S206). This allows the examiner or the subject to easily grasp the tension tendency of the eye E under examination. The examiner can then perform the main measurement or re-fog after understanding the tension tendency of the eye E under examination. That is, if the amount of change in the objective measurement results from the start of fogging is large (indicating that the tension tendency of the eye E under examination is estimated to be "prone to tension"), even if the tension state is relieved at the end of fogging control, there is a high possibility that accommodation will change when performing the main measurement such as subjective measurement. For this reason, it is necessary to pay attention to the tension state of the eye E under examination during the main measurement. In the ophthalmic device 1 of Example 1, the examiner can grasp the tension tendency of the eye E under examination before performing the main measurement, so the examiner can perform the main measurement while monitoring the tension state of the eye E under examination.

[0078] Furthermore, in the ophthalmic device 1 of Example 1, the control unit 40 displays a graph showing the relationship between the amount of fogging when presenting the fixation target and the objective measurement results of the eye characteristics measured over time (step S203). This makes it easier for the examiner or the subject to understand the relationship between the amount of fogging and the objective measurement results of the eye E under examination, and to more accurately grasp the tension state of the eye E under examination.

[0079] Furthermore, the ophthalmic device 1 of Example 1 has a left measurement optical system 25L with an ocular refractive power measurement system 43 and keratin system 47 for objectively measuring the ocular characteristics of the left eye E under examination, and a right measurement optical system 25R with an ocular refractive power measurement system 43 and keratin system 47 for objectively measuring the ocular characteristics of the right eye E under examination. In other words, the ophthalmic device 1 of Example 1 is a binocular open-type ophthalmic device capable of measuring both the left and right eyes E of the subject. As a result, the ophthalmic device 1 can measure ocular characteristics of both eyes simultaneously, apply fogging to both eyes simultaneously, and set different fixation target presentation positions for the left and right eyes. Therefore, the accommodation of the left and right eyes E under examination can be appropriately released.

[0080] Furthermore, since the ophthalmic device 1 of Example 1 is a binocular open type, the ophthalmic device 1 can simultaneously display a graph G showing the relationship between the amount of cloudiness and the objective measurement results of eye characteristics measured over time, as shown in Figure 7. This allows the examiner to compare the graph G displayed for each of the left and right eyes E being examined and to determine, for example, whether the subject is anisometropic.

[0081] The ophthalmic device of the present invention has been described above based on Example 1, but the specific configuration is not limited to this example, and changes or additions to the design are permitted as long as they do not depart from the gist of the invention as described in each claim.

[0082] In other words, the ophthalmic device 1 of Example 1 is shown as a binocular open-type ophthalmic device capable of objectively measuring the ocular characteristics of the left and right eye E individually. However, the ophthalmic device of the present invention is not limited to this, and may be a monocular type ophthalmic device that measures the ocular characteristics of one eye at a time. That is, the ophthalmic device of the present invention may be equipped with an objective measurement optical system that objectively measures the ocular characteristics of the left eye E and the ocular characteristics of the right eye E, one at a time.

[0083] Furthermore, the left measuring optical system 25L and the right measuring optical system 25R of the ophthalmic device 1 in Example 1 include at least a target projection system 42 (subjective measurement optical system 44), an ocular refractive power measurement system 43, and a keratological system 47. In other words, Example 1 shows an example in which the ophthalmic device 1 has a so-called combined function, performing autorefraction / keratological measurement and subjective refraction testing under binocular vision in a single device. However, the ophthalmic device 1 is not limited to this, and may be, for example, a device capable of measuring only the refractive power of the eye E under examination. In this case, it is desirable that the ophthalmic device be equipped with a transmission mechanism that enables the transmission of information to other ophthalmic devices equipped with measuring optical systems for measuring ocular characteristics.

[0084] If the ophthalmic device is equipped with a transmission mechanism, it is possible to transmit objective measurement results of eye characteristics measured in time series to the other ophthalmic device via the transmission mechanism for use in setting the measurement state of the measuring optical system of that other ophthalmic device. This allows the other ophthalmic device to use the objective measurement results in cloud conditions acquired by ophthalmic device 1 for its own settings. In other words, by providing a transmission mechanism, the control unit 40 can link ophthalmic device 1 of Embodiment 1 with other ophthalmic devices.

[0085] Furthermore, in Example 1, an example was shown in which the presentation position of the fixation target was changed in a direction in which the amount of fog gradually increased, and the ocular characteristics of the eye E under examination were objectively measured each time. However, the method of changing the presentation position of the fixation target and the timing of objectively measuring the ocular characteristics are not limited to this. For example, the control unit 40 may continuously measure the objective ocular characteristics of the eye under examination while gradually changing the presentation position of the fixation target in a stepless manner in which the amount of fog increases. In this case, the presentation position of the fixation target can be changed steplessly and objective testing can be performed continuously, making it possible to accurately grasp the amount of fog at which accommodation of the eye under examination is released. In other words, objectively measuring ocular characteristics in a time series includes objectively testing the ocular characteristics in multiple stages while fog is applied to the eye under examination E, and objectively testing the ocular characteristics for a certain period of time while fog is applied to the eye under examination E.

[0086] Furthermore, Example 1 showed an example in which an objective examination was performed in the main measurement (step S3). However, in this measurement, a subjective examination may be performed using the subjective measurement optical system 44 after the objective examination. In this case, the settings of the subjective measurement optical system 44 may be adjusted before performing the subjective examination based on the objective measurement results of the eye characteristics measured in time series during cloud control.

[0087] Furthermore, in Example 1, an example was shown in which the objective measurement results were determined to have converged based on whether the amount of fog reached a predetermined "default amount of fog". However, the control unit 40 may also determine whether the objective measurement results have converged even if the amount of fog has not reached the "default amount of fog", and may terminate the fog control (decide not to continue changing the position of the fixation target) when the objective measurement results have converged, and then perform the measurement. In other words, the determination of whether the amount of fog has reached the "default amount of fog" (step S204 shown in Figure 4) does not necessarily have to be performed.

[0088] Alternatively, the control unit 40 may move the fixation target to a predetermined amount of cloudiness, then perform an objective examination of the eye E being examined, and determine whether the objective measurement results have changed.

[0089] Furthermore, in the ophthalmic device 1 of Example 1, an example was shown in which the relationship between the amount of clouding and the objective measurement results was displayed graphically each time the ocular characteristics of the eye E under examination were objectively measured. However, the graph may be displayed all at once at any arbitrary timing, such as when clouding control is completed (when the objective measurement results converge) or when necessary measurements such as this measurement are completed. In addition, the graph G may be displayed as a pop-up on the display unit 31 as shown in Figure 7, or it may be displayed in full screen on the display unit 31.

[0090] Furthermore, while the control unit 40 changes the presentation position of the fixation target at a constant speed until the amount of cloud fog increases by a predetermined amount, it performs an objective examination of the eye under test at high speed (e.g., 30 Hz) and performs frequency analysis of the objective measurement results. Based on the amount of frequency components related to the accommodative microfluctuation of the eye under test E, it may be determined that "the objective measurement results have converged" by identifying that the accommodative microfluctuation has been relieved.

[0091] Furthermore, if the objective measurement result changes in the negative direction (near vision direction), it is possible that the eye E under examination has adjusted regardless of the position of the fixation target. In such cases, the control unit 40 may return the presentation position of the fixation target to the same level as before the objective measurement result changed in the negative direction, present the fixation target at the returned position, apply the fixation again, and start the measurement.

[0092] Furthermore, if it is known that the objective measurement results converged before the amount of fog reached a predetermined "default amount of fog," the control unit 40 returns the fixation target presentation position to the amount of fog at the time when the objective measurement results converged before the amount of fog reached the "default amount of fog." The control unit 40 may then present the fixation target at the returned position, apply fog, and start the measurement.

[0093] Furthermore, the control unit 40 may set an upper limit (for example, +3.0 diopters) for the amount of fog, and terminate fog control when the amount of fog reaches the upper limit, even if the objective measurement results have not converged. In this case, the control unit 40 notifies the examiner, etc., in step S206, not only of the tendency of tension in the eye E under examination, but also that the tension in the eye E under examination has not been relieved. In other words, when the tension in the eye E under examination has not been relieved, the control unit 40 may notify both the tendency and the tension state of the eye E under examination. Note that "tension state of the eye E under examination" is information indicating whether or not the tension in the eye E under examination has been relieved. Also, in Example 1, if the tension in the eye E under examination has been relieved, the control unit 40 does not notify "tension state of the eye E under examination," that is, that the tension in the eye E under examination has been relieved. However, the control unit 40 may notify "tension state of the eye E under examination" regardless of whether or not the tension has been relieved.

[0094] Furthermore, in Example 1, the control unit 40 was shown to notify the "tendency of tension in the eye E under examination" and, if the tension in the eye E under examination has not been relieved, to notify the "tension state of the eye E under examination." However, the control unit 40 may not notify the "tendency of tension in the eye E under examination" and may simply notify whether or not the tension in the eye E under examination has been relieved, that is, only the "tension state of the eye E under examination." Also, the control unit 40 does not necessarily have to notify the "tendency of tension in the eye E under examination" and the "tension state of the eye E under examination." [Explanation of Symbols]

[0095] 1 Ophthalmology equipment 25L Left measurement optical system 25R Right measurement optical system 40 Control Unit 41 Observation System 42 Visual target projection system 43. Refractive power measurement system (objective measurement optical system) 44 Subjective Measurement Optical System 47. Keratonic system (objective measurement optical system)

Claims

1. An ophthalmic device control program executed in an information processing device that controls an ophthalmic device comprising an objective measurement optical system for objectively measuring the ocular characteristics of an eye under examination, and a target projection system for presenting a fixation target to the eye under examination at a predetermined presentation position and creating a cloud-like effect on the eye under examination, An objective measurement step involves changing the presentation position of the fixation target in a direction that increases the amount of cloud or fog, presenting the fixation target using the target projection system, and objectively measuring the eye characteristics in a time series using the objective measurement optical system. An estimation step in which, based on the objective measurement results of the aforementioned eye characteristics measured in a time series, the tension tendency of the eye being examined, which indicates the properties of each eye being examined for clouds and fog, is estimated. An ophthalmic device control program characterized by causing the information processing device to execute the following.

2. In the ophthalmic device control program described in claim 1, The information processing device is instructed to perform a notification step to notify the estimated result of the tension trend. An ophthalmic device control program characterized by the following:

3. In the ophthalmic device control program described in claim 1 or claim 2, In the estimation step, the tension tendency is estimated based on whether the amount of change in the objective measurement results measured from the start of clouding is greater than a predetermined amount. An ophthalmic device control program characterized by the following:

4. In an ophthalmic device control program according to any one of claims 1 to 3, Based on the objective measurement results of the aforementioned eye characteristics measured over time, the information processing device is instructed to perform the step of setting the amount of cloud fog to increase when changing the presentation position of the fixation target. An ophthalmic device control program characterized by the following:

5. In an ophthalmic device control program according to any one of claims 1 to 4, Based on the objective measurement results of the eye characteristics measured over time, the information processing device is instructed to perform a decision step of changing the presentation position of the fixation target and deciding whether or not to continue applying a cloud to the eye being examined. An ophthalmic device control program characterized by the following:

6. In the ophthalmic device control program described in claim 5, In the aforementioned determination step, if the amount of variation in the objective measurement results converges to a predetermined range, the system determines that it will end the change in the presentation position of the fixation target. If the amount of variation in the objective measurement results does not converge to the predetermined range, the system determines that it will change the presentation position of the fixation target in a direction that increases the amount of fog and continue to apply fog to the eye being examined. An ophthalmic device control program characterized by the following:

7. In an ophthalmic device control program according to any one of claims 1 to 6, The information processing device is instructed to perform a step of notifying the tension state of the eye being examined, based on the objective measurement results of the eye characteristics measured in a time series. An ophthalmic device control program characterized by the following:

8. In an ophthalmic device control program according to any one of claims 1 to 7, The information processing device is instructed to perform the step of displaying a graph showing the relationship between the amount of cloud fog when the fixation target is presented and the objective measurement results of the ocular characteristics measured over time. An ophthalmic device control program characterized by the following:

9. In an ophthalmic device control program according to any one of claims 1 to 8, The ophthalmic device includes a subjective measurement optical system for subjectively measuring the ocular characteristics, The information processing device is instructed to perform the following steps: adjust the settings of the subjective measurement optical system based on the objective measurement results of the eye characteristics measured in a time series, and measure the eye characteristics using the subjective measurement optical system. An ophthalmic device control program characterized by the following:

10. In an ophthalmic device control program according to any one of claims 1 to 9, the information processing device is made to perform the step of transmitting objective measurement results of the eye characteristics measured in time series to another ophthalmic device equipped with a subjective measurement optical system for subjectively measuring the eye characteristics, via a transmission mechanism that enables the transmission of information to the other ophthalmic device equipped with a subjective measurement optical system for subjectively measuring the eye characteristics, for use in setting the measurement state of the subjective measurement optical system provided by the other ophthalmic device. An ophthalmic device control program characterized by the following:

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