JP6104330B2 - Ophthalmic apparatus and method for controlling ophthalmic apparatus - Google Patents

Description

The present invention, ophthalmology device, and a method for controlling the ophthalmology device.

  Conventionally, a fundus camera having an illumination optical system that illuminates the fundus of the eye to be examined, a photographing optical system that captures the fundus, an observation optical system that observes the fundus, and a focusing optical system that focuses the fundus is known. It has been. In order to perform fundus photography, complicated operations and experience are required, such as positioning with the pupil of the eye to be examined, working distance, focusing, and gaze guidance, and paying attention to eyelid rise and blinking.

  Therefore, a fundus camera that automates focusing and facilitates fundus photography is used. There are two types of automatic focusing methods: a detection method in which a focus index is projected onto the fundus, the index image is captured and processed, and a focus index is not used. In other words, the method can be classified into methods for detecting blur in the captured fundus image.

  The fundus camera described in Patent Document 1 starts focusing after inputting the eye refractive power of the eye to be examined and moving the focusing lens to a corresponding position prior to fundus imaging in the focus index projection type. doing. This is to solve the problem that when the refractive power is large, the time for moving the focusing lens increases and the focusing time is delayed.

  On the other hand, in a fundus camera that performs focus control using the fundus image blur detection method, if the focus lens is moved approximately to the eye refractive power position of the eye to be examined, the focus lens moves near the top of the focus evaluation value curve. Will do. However, the shape of the focus evaluation value curve obtained from the fundus image is largely blurred, and even if you try to obtain the focus evaluation value after moving the focusing lens near the top, Cannot judge whether there is a peak. At least, if the peak of the focus evaluation value curve is scanned almost from the middle, the overall shape of the peak is grasped, and the top is not found, an accurate focus result cannot be obtained.

  For this reason, in the conventional fundus camera, once moving to the − end side of the moving range of the focusing lens, scanning for acquiring the focus evaluation value in the + end direction is started. After detecting the peak of the in-focus evaluation value, when the in-focus evaluation value falls below a certain set value, scanning is stopped and the in-focus lens is moved to the peak position of the in-focus evaluation value to perform shooting. .

  In FIG. 10, the horizontal axis indicates the movement range of the focusing lens, the + end indicates the limit position of the plus diopter, and the − end indicates the limit position of the minus diopter. The vertical axis (plus side) is a focus evaluation value, which is a value obtained by adding the values of high-frequency components in a predetermined region of the fundus image. The closer to the focus position, the higher the contrast and the greater the focus evaluation value. The in-focus evaluation value curve in FIG. 10 represents an example of the in-focus evaluation value when the focusing lens is scanned over the entire moving range, and only the curve in the scanned range is actually obtained. The lower side of the vertical axis in FIG. 10 shows a sequence of focusing lens movement and focusing evaluation value scanning on the time axis.

  The solid line Mx is used when only the focusing lens is moved, and the broken line Sx is shown when scanning for obtaining the focus evaluation value is performed, and x indicates the order. ◎ indicates the start position of the focusing lens control, and ◯ indicates the focus end position. Normally, shooting is performed at this position.

  The focusing lens in this example moves from the ◎ position to the-end, starts scanning S1 for acquiring the focusing value in the + direction from M1, and detects the peak of the focusing evaluation value curve in the middle. When the focus evaluation value becomes equal to or less than the threshold value L0, it stops, moves M2, and takes an image at the peak position. The movement speed of the focusing lens is significantly slower than the movement Mx in which the operation Sx accompanied by acquisition of the focus evaluation value is only moved.

Japanese Patent No. 4138101 JP-A-5-199998

  However, in such a fundus camera, it is assumed that the eye refractive power of the eye to be examined is known in advance, and means for inputting the eye refractive power is also required. For this reason, there is a problem that the number of operation units increases and becomes complicated, resulting in an increase in cost. Further, when the refractive power is used, the contrast of the fundus may not always be appropriate.

  An object of the present invention is to provide a fundus camera capable of automatically adjusting the contrast of the fundus.

To achieve the above object, an ophthalmologic apparatus according to the present invention uses a lens driving unit that moves a focusing lens that focuses an imaging unit with respect to the fundus of an eye to be examined in the optical axis direction of the imaging optical system, and a finder. Control means for changing the control method of the lens driving means to manual control or automatic control based on a mode selected from a mydriatic mode and a non-mydriatic mode for observing the fundus, and the control means It is a control method and manual control of the lens driving unit when the mydriatic mode is selected, you and automatically controlling the control method of the lens driving means when the non-mydriatic mode is selected.

  According to the fundus camera of the present invention, it is possible to shorten the time until the focusing is completed by performing the focusing evaluation value scanning after the movement by the predetermined movement amount. In addition to improving the efficiency of fundus imaging, there is an advantage that the burden on the subject is reduced. Furthermore, the focus control can be performed more efficiently by setting the predetermined movement amount to an appropriate value according to the situation.

It is a block diagram of the fundus camera of the embodiment. It is explanatory drawing of the area which calculates a focus evaluation value. It is operation | movement explanatory drawing of a focusing lens. It is operation | movement explanatory drawing of a focusing lens. It is operation | movement explanatory drawing of a focusing lens. It is operation | movement explanatory drawing of a focusing lens. It is a flowchart figure. It is operation | movement explanatory drawing of a focusing lens. It is a flowchart figure. It is operation | movement explanatory drawing of the conventional focusing lens.

  The present invention will be described in detail based on the embodiment shown in FIGS.

  FIG. 1 shows a configuration diagram of the fundus camera of the embodiment. In the illumination optical system from the halogen lamp 1 that is the fundus observation light source to the objective lens 2 in front of the eye E, the halogen lamp 1 that is the observation light source, the diffusion plate 3, the condenser lens 4, and the visible cut filter 5 are arranged. Has been. Further, a strobe light source 6, which is a photographing light source substantially conjugate to the pupil Ep of the eye E, a ring slit 7, a condenser lens 8, a fixed mirror 9, relay lenses 10, 11, a corneal baffle 12, and a perforated mirror 13 are sequentially provided. Has been placed. Arranged behind the perforated mirror 13 are an imaging aperture 14, a focusing lens 15, an imaging lens 16, a flip-up mirror 17 composed of a dichroic mirror that transmits infrared light and reflects visible light, and a fixed mirror 18. Yes. In the reflection direction of the fixed mirror 18, a relay lens 19, a mirror 20, a relay lens 21, an infrared cut filter 22 inserted in the optical path at the time of photographing, and a digital camera 23 for observing and photographing the fundus image are sequentially arranged. It is an observation photographing optical system.

  A movable mirror 24 and an internal fixation lamp 25 are arranged in the reflected light path of the flip-up mirror 17. Further, a finder optical system including a field stop 26 and an eyepiece lens 27 is disposed in the reflection direction of the movable mirror 24.

  The digital camera 23 is attached to the fundus camera body via a detachable mount. The digital camera 23 includes a quick return mirror 23a, a CMOS area sensor 23b, an LCD monitor 23c, and a processing circuit 23d. The CMOS area sensor 23b is provided with an RGB filter that transmits in the near-infrared region. The CMOS area sensor 23b has sensitivity in the visible and infrared regions, and can capture moving images and still images. At the time of moving image capturing, the gain of the amplifier with the built-in CMOS area sensor 23b is set to high sensitivity, and the processing circuit 23d thins out so as to match the resolution of the LCD monitor 23c. Is displayed.

  The focusing lens 15 is provided with a potentiometer 28 for detecting its position. The processing circuit 23 d of the digital camera 23 is connected to the control unit 31, and the control unit 31 is connected to the storage unit 32, the shooting mode switch 33, the left and right eye detection unit 34, and the shooting switch 35. Further, the output of the control unit 31 is connected to the focusing lens 15 to drive the focusing lens 15.

  The control unit 31 controls the raising mirror 17, the movable mirror 24 and the filters 5 and 22, the position control of the focusing lens 15, and the communication control with the digital camera 23. Furthermore, the photographing switch 35, the left and right eye detecting means 34 for detecting the direction of the eye to be photographed, the photographing mode switch 33, and the storage unit for storing the photographing mode and the photographing position distribution for each photographing in the form of a database in units of date and week. 32.

  When photographing the fundus oculi Er of the eye E, a strobe light source 6 is emitted to capture a still image. In this case, the gain of the amplifier with the built-in CMOS area sensor 23b is returned to normal, the S / N is increased, and image data having resolving power in all pixels of the CMOS area sensor 23b is developed by the processing circuit 23d. Save the file in the specified file format on the storage medium.

  FIG. 2 is an explanatory diagram of an area for calculating the contrast of the fundus image. The fundus image Er ′ is formed on the CMOS area sensor 23b, and the area A including the macular portion M and the nipple N is a range in which the contrast is calculated. Is shown. The processing circuit 23d adds a signal whose band is further limited from the high-frequency component of the image information in the area A of the moving image of the fundus image to be captured, and outputs a focus evaluation value which is a value indicating the level of the focus state.

  The focus evaluation value of a predetermined area is acquired while moving the focusing lens 15, and the focus evaluation value at each point in the moving range is complemented with a spline curve or the like, and the peak position of the focus evaluation value curve is calculated. To obtain the in-focus position. The control unit 31 moves the focusing lens 15 based on this result. The quick return mirror 23a in the digital camera 23 is held in a state of being flipped up while being mounted on the fundus camera.

  If there is no operation input for a certain period of time, the control unit 31 moves the focusing lens 15 to the approximate center position (0 diopter) of the movement range along the optical axis direction by the lens driving means. The control unit 31 controls to stop and shoot from the same direction in order to eliminate the influence of the backlash of the driving means of the focusing lens 15 and maintain the focusing accuracy.

  In the following example, the moving direction is the + to-direction and the focus evaluation value scanning direction is the-to + direction, but control may be performed in the opposite direction. When performing focus evaluation value scanning, there are two methods: a method of acquiring a focus evaluation value while moving the focusing lens 15 at a low speed, and a method of acquiring a focus evaluation value after stopping. There is. In the former method, it is necessary to slow down the moving speed so that the moving distance is less than the focusing accuracy during the time when the focus evaluation value is acquired. In the latter method, the moving speed is increased but the acceleration is accelerated. Vibration occurs due to sudden stop. Accordingly, in any method, the focus evaluation value scanning speed is slower than the speed when only the movement is performed.

  At the time of fundus observation, white light generated from the halogen lamp 1 passes through the visible cut filter 5 and illuminates the fundus Er with infrared light. At the time of photographing, the halogen lamp 1 is turned off and the strobe light source 6 emits light to illuminate the fundus Er.

  From this database, the photographing position distribution for one month can be read out according to the photographing mode, and the focusing lens 15 can be moved to the corresponding position. When a housing (not shown) on which the optical system of the fundus camera is mounted is moved according to the left and right eyes of the eye E, the left and right eye detection means 34 is turned on and off, and the left and right eyes to be photographed can be detected.

  In the above configuration, the mydriatic photographing and the non-mydriatic photographing can be selected by the photographing mode switch 33. When the mydriatic photographing mode is selected, the visible cut filter 5 is retracted out of the optical path, and the infrared cut filter 22 is disposed in the optical path. Inserted inside. In the setting for performing automatic focusing, the flip-up mirror 17 is retracted from the optical path. The visible light emitted from the halogen lamp 1 is reflected by the fixed mirror 9 through the ring slit 7 and the condenser lens 8, further reflected by the periphery of the perforated mirror 13, and after passing through the pupil Ep through the objective lens 2. Illuminates the fundus Er.

  Reflected light from the fundus Er passes through the central part of the pupil Ep, passes through the hole of the objective lens 2 and the perforated mirror 13, and is reflected by the fixed mirrors 18 and 20 through the photographing aperture 14 and the focusing lens 15. Further, the light passes through the infrared cut filter 22 and forms an image on the CMOS area sensor 23 b in the digital camera 23.

  When the non-mydriatic photographing mode is selected with the photographing mode switch 33, the visible cut filter 5 is inserted into the optical path, the flip-up mirror 17 enters the optical path, the movable mirror 24 is retracted in the direction of the broken line, and the red The outer cut filter 22 is retracted out of the optical path. The luminous flux emitted from the halogen lamp 1 is cut into visible light by the visible cut filter 5 to become near-infrared light, is reflected around the perforated mirror 13, and illuminates the fundus Er through the objective lens 2.

  The fundus image by near-infrared light reflected by the fundus Er passes through the holes of the objective lens 2 and the perforated mirror 13, passes through the focusing lens 15 and the flip-up mirror 17, and is reflected by the fixed mirrors 18 and 20. The image is formed on the CMOS area sensor 23b. Since the fundus observation image by the CMOS area sensor 23b is displayed as a moving image on the LCD monitor 23c, the examiner performs an alignment operation using an operation rod (not shown).

  In the non-mydriatic photographing mode, the visible light beam from the internal fixation lamp 25 travels straight because the movable mirror 24 is retracted from the optical path, and is reflected by the flip-up mirror 17 to be reflected by the focusing lens 15 and the apertured mirror 13. And is projected onto the eye E through the objective lens 2. Therefore, the eye E looks at the light source image from the internal fixation lamp 25, and the examiner adjusts the direction of the fundus Er by adjusting the light emission position of the internal fixation lamp 25 with a switch (not shown).

  In the mydriatic mode, an external fixation lamp (not shown) installed outside is focused on an eye different from the photographed eye to adjust the position of the fundus Er. When the finder optical system is used in the mydriatic mode, the flip-up mirror 17 and the movable mirror 24 are inserted into the optical path by a switch (not shown). The visible light reflected by the fundus Er is reflected by the flip-up mirror 17 and the movable mirror 24 and guided to the finder optical system by the eyepiece lens 27. Since the light beam from the fundus Er is not incident on the digital camera 23, automatic focusing control is not performed, and focusing is performed by rotating the knob (not shown) and moving the focusing lens 15 by the examiner.

  When the alignment with the fundus Er is completed and the photographing switch 35 is pressed halfway, the control unit 31 moves the focusing lens 15 by a predetermined amount of movement in the minus diopter direction (− direction) and then in the plus diopter direction (+ direction). Scanning with the acquisition of the focus evaluation value is started. This predetermined movement amount is set according to the photographing mode.

  When focusing is completed, the examiner is notified by display or sound. When the photographing switch 35 is fully pressed, the flip-up mirror 17 jumps up when the finder is used in the non-mydriatic mode or the mydriatic mode. In the non-mydriatic mode, the infrared cut filter 22 is inserted into the optical path, and the strobe light source 6 is turned on. Shoot with flash.

  In addition, the peak position of the focus evaluation value acquired in the non-mydriatic mode is far behind the retina of the fundus Er in comparison with the mydriatic mode in which the fundus Er is illuminated with visible light. Therefore, the correction is performed by moving the focusing lens 15 before emitting the photographing light.

  3 to 6 are explanatory views of the operation of the focusing lens 15 when the same eye E is continuously photographed. The horizontal axis is the range in which the focusing lens 15 can move, with the right side being the + end and the left side being the − end. The vertical axis + side indicates the focus evaluation value, and the negative side indicates the time axis when driving the focusing lens 15. ▽ indicates the position of the previous focusing lens 15, 開始 indicates the start position of the current focusing lens 15 drive sequence, and ◯ indicates the end position of the current focusing lens 15 drive sequence. A solid line indicates that only the focusing lens 15 is moved, and a broken line indicates focus evaluation value scanning that moves while acquiring the focus evaluation value.

  The threshold value L1 is a focus evaluation value level that determines a stop position and a return position of the focusing lens 15. The focus evaluation value curve is drawn when the focusing lens 15 is scanned over the entire range, but in fact, since the focus evaluation value in the range exceeding the threshold L1 is extracted, only this curve is obtained. Absent. W indicates movement by a predetermined movement amount set in advance.

  FIG. 3 shows an example in which the current focus position ◯ is within the range of the predetermined movement amount W on the − side with respect to the previous position ▽. When the photographing switch 35 is half-pressed, the focusing lens 15 is moved M1 from the ◎ position to the − direction by a predetermined movement amount W, the focus evaluation value at that position is set to the threshold value L1, and the moving direction to the + side. And the focus evaluation value scan S1 is started. If the focus evaluation value is below the threshold value L1 and a peak is detected, the focus evaluation value is stopped, and the movement M2 is moved to the peak position in the negative direction. Thus, the in-focus state is completed, and is recognized by the examiner by a display (not shown).

  FIG. 4 shows an example in which the current focus position ◯ is within the range of the predetermined movement amount W on the + side with respect to the previous position ▽. First, the movement M1 is moved from the start position ◎ in the − direction by a predetermined movement amount W, and the focus evaluation value at that position is set to the threshold L1. Next, the moving direction is changed to the + side, and focus evaluation value scanning S1 is started. If the acquired focus evaluation value is equal to or less than the threshold value L1 and a peak is detected, stop and move M2 in the negative direction to the peak position. Compared to FIG. 3, the distance between the scan S <b> 1 and the movement M <b> 2 is slightly longer, but the other is the same.

  FIG. 5 shows an example of the case where the current in-focus position ◯ is farther than the predetermined movement amount W on the − side with respect to the previous position ▽. This cannot happen, and is limited to the case where the difference in refractive power between the left and right eyes is very large. As an operation, it moves by W from the start position ◎ to the − side and starts scanning the focus evaluation value toward the + side. However, since the focus evaluation value acquired continuously is less than or equal to the threshold value L1, The focal scan S1 is immediately stopped.

  Next, from the position moved for the first time, the distance M2 is further moved in the negative direction from W, that is, from the start position A to the position 2W. Similarly, the focus evaluation value scan S2 is started in the + direction. Since the in-focus evaluation value continues below the threshold value L1, scanning S2 is stopped. Similarly, it moves to the − side to the position 3W, updates the threshold value L1, and starts scanning S3. Since the peak is detected and falls below the threshold value L1, the scanning is stopped and moved to the peak position M4.

  FIG. 6 shows an example in which the current in-focus position is away from the predetermined movement amount W on the + side with respect to the previous position. This cannot occur in the case of photographing with the same eye. Move by W to update the threshold L1 and start the scan S1. When the peak of the focus evaluation value curve is detected, a value obtained by subtracting the threshold value L1 set at the start position of the scan S1 from the peak value is set to h. If the value h is larger than the reference value, a value that is lowered from the peak value by the half value h / 2 of the value h is updated as the threshold value L1. If the scanning continues and falls below the threshold value L1, the scanning is stopped and moved to the peak position M2.

  FIG. 7 is a flowchart showing the operation of FIGS. First, in the focusing routine, the movement amount W1 is set to the predetermined movement amount W in step S101. In step S102, the flag for storing the presence or absence of the peak is cleared, and the number N of times of movement is set to 1. If the focusing lens 15 is moved W in the negative direction in step S103, it moves to the negative end if it exceeds the negative end. The focus evaluation value at the position moved in step S104 is acquired and set as a threshold value.

  In step S105, scanning in the positive end direction is started, a focus evaluation value is acquired in step S106, and whether or not a peak is detected is determined in step S107. The determination of the peak is performed by checking the shape, such as climbing up by a predetermined movement amount, descending by a predetermined movement amount, and still having a certain width.

  If there is a peak, a peak flag is set in step S108, and a value obtained by subtracting the focus evaluation value acquired at the start of the focus scanning S1 from the peak value of the focus evaluation value is set as the value h. In step S109, the value h is compared with the reference value. If it is larger than the reference value, the threshold value L1 is set to a value obtained by subtracting h / 2 from the peak value in step S110.

  In step S111, the current focus evaluation value is compared with the threshold value L1, and if smaller than the threshold value L1, the process proceeds to step S113, and if larger, the process proceeds to step S112. In step S112, it is determined whether or not the + end has been reached. If the + end has not been reached, the process is repeated from step S106. If the + end has been reached, scanning is stopped in step S116, and the focusing lens 15 is moved in step S118. Move to the initial position.

  The normal initial position is the 0 diopter position. In this case, the inspector is informed by a display (not shown) that the in-focus position is not detected. If the peak flag is detected by determining the peak flag in step S113, scanning is stopped in step S117. If no peak is detected in step S113, the process proceeds to step S114. In step S114, it is determined whether the focus evaluation value is continuously lower than the threshold value L1, and if it is continuously lower than the threshold value L1, scanning is stopped in step S115, N is incremented, and the process is repeated from step S103.

  If the focus evaluation value is not continuously equal to or less than the threshold value L1 in step S114, the process is repeated from step S106. From step S117, the process proceeds to step S119, where the obtained focus evaluation value curve is complemented by a spline curve or the like to calculate the focus evaluation value curve, and the focusing lens 15 is moved to the peak position of the mountain. The focus routine ends. Even when focusing is completed normally, the examiner is informed by a display (not shown).

  FIG. 8 shows an example in which one eye of the same subject is photographed and then switched to the other eye for photographing. When the photographing eye direction is switched, an on / off signal of the left and right eye detection means 34 is input to the control unit 31, and it is determined that the left and right eyes are switched. For example, when the right eye is photographed and switched to the left eye, the focusing lens 15 moves in the negative direction by a predetermined movement amount W from the right eye photographing position ▽. When the photographing switch 35 is pressed halfway, the focus scanning S1 is started, a peak is detected, and the focus M is moved to the peak position M2 to complete the focus.

  When the examiner recognizes the in-focus state with a display or sound (not shown) and confirms the imaging region and the like, when the imaging switch 35 is fully pressed, the strobe light source 6 emits light and fundus imaging is performed. In the case of this operation, if the focusing drive system can move the focusing lens 15 at high speed, it may be moved by a predetermined movement amount W after the photographing switch 35 is half-pressed.

  FIG. 9 is a flowchart in which the processing in the case where the right and left eyes are switched as shown in FIG. First, in step S201, it is determined whether or not the previous photographing has been performed based on whether or not photographing with the same eye has been performed within a predetermined time. If the photographing has been completed, the movement amount W1 is set to the predetermined movement amount W in step S202, and if the photographing has not been performed, the movement amount W3 is set to the predetermined movement amount W in step S203. Next, in step S204, it is determined whether or not switching to another eye is performed. If switched, the movement amount W2 is set to a predetermined movement amount W in step S205.

  When the same eye is repeatedly photographed, it does not change by more than one diopter even if a difference due to adjustment, a difference due to a photographing position, a difference in positional relationship with the fundus camera, or the like is included. A value obtained by adding the half-value width of the focus evaluation value curve to this diopter is defined as a movement amount W1. The difference between the refractive powers of the left and right eyes is within 1 to 1.5 diopters, and a value obtained by adding the half-value width of the focus evaluation value curve to the amount corresponding thereto is defined as the movement amount W2.

  From the database of the storage unit 32, the photographing position distribution of the focusing lens 15 photographed in the current photographing mode within the last one month is regarded as a normal distribution, and the half-value width of the focus evaluation value curve is added to the standard deviation from the center position. The obtained value is defined as a movement amount W3. When the number of data for performing statistical processing is small, if the range is expanded in order from one month, the magnitude of the movement amount becomes a large value in the order of W1 <W2 <W3. Step S207 and subsequent steps are the same as step S103 in FIG.

  In the flowcharts of FIGS. 7 and 9 described above, the first movement position of the focusing lens 15 is set in the focusing routine. This is not a problem when the moving speed of the driving system of the focusing lens 15 is sufficiently high, but when the moving speed is not sufficient, the focusing lens 15 is moved in advance when the left and right eyes are switched. deep.

  Similarly, when the same eye is repeatedly photographed, the movement M1 is performed immediately after photographing, and the next photographing starts from scanning S1. When the first movement M1 is performed separately from the focusing routine, N = 2 may be set when N is initialized in each flowchart.

  If the movement amounts W1, W2, and W3 for setting the predetermined movement amount are small, the movement time and the scanning time can be shortened, so that they are appropriately updated from the database so as to suit the environment used by the fundus camera. It has become.

  In this flowchart, it has been described that the moving direction is in the negative direction and the scanning for acquiring the focus value is in the positive direction, but both may be in the reverse direction.

DESCRIPTION OF SYMBOLS 1 Halogen lamp 2 Objective lens 6 Strobe light source 13 Perforated mirror 15 Focus lens 17 Bounce mirror 23 Digital camera 23b CMOS area sensor 25 Internal fixation lamp 31 Control part 32 Memory | storage part 34 Left-right eye detection means 35 Shooting switch

Claims (8)

A lens driving means for moving a focusing lens for focusing the imaging means on the fundus of the eye to be examined in the optical axis direction of the photographing optical system;
Control means for changing the control method of the lens driving means to manual control or automatic control based on a mode selected from a mydriatic mode and a non-mydriatic mode for observing the fundus using a viewfinder ;
Equipped with a,
The control means manually controls the control method of the lens driving means when the mydriatic mode is selected, and automatically controls the control method of the lens driving means when the non-mydriatic mode is selected. ophthalmology equipment characterized by Rukoto. Wherein, when the mydriatic mode is selected, ophthalmic device of claim 1, wherein the controller controls the lens driving means on the basis of the examiner operation on the operation acceptance means. Wherein, when said non-mydriatic mode is selected, according to claim 1 or claim, wherein the controller controls the lens driving means on the basis of the evaluation value indicating the contrast of the fundus image taken by the image pickup means Item 3. The ophthalmic apparatus according to Item 2 . The ophthalmologic apparatus according to any one of claims 1 to 3 , further comprising selection means for selecting one of the mydriatic mode and the non-mydriatic mode. Wherein the subject's eye when the mydriatic mode is selected is illuminated with visible light, according to claim 1 to 4 wherein the subject's eye when the non-mydriatic mode is selected characterized in that it is illuminated by the infrared light ophthalmic equipment according to any one of. A focusing lens that focuses the imaging means on the fundus of the eye to be examined;
The method of moving the focusing lens in the direction of the optical axis of the photographing optical system is changed to manual or automatic based on a mode selected from a mydriatic mode and a non-mydriatic mode in which the fundus is observed using a viewfinder and control means for,
The control means uses a manual method for moving the focusing lens when the mydriatic mode is selected, and an automatic method for moving the focusing lens when the non-mydriatic mode is selected. ophthalmology equipment characterized by Rukoto. A method for controlling an ophthalmologic apparatus including a focusing lens that focuses an imaging unit on the fundus of a subject's eye,
The method of moving the focusing lens in the direction of the optical axis of the photographing optical system is changed to manual or automatic based on a mode selected from a mydriatic mode and a non-mydriatic mode in which the fundus is observed using a viewfinder a control step of,
In the control step, the method of moving the focusing lens when the mydriatic mode is selected is manual, and the method of moving the focusing lens when the non-mydriatic mode is selected is automatic. A method for controlling an ophthalmologic apparatus. A dichroic mirror that splits light into visible light and infrared light;
The dichroic mirror reflects the return light of the visible light from the eye to be examined in the mydriatic mode to guide the return light of the visible light to the finder, and infrared from the eye to be examined in the non-mydriatic mode Guide the return light of the infrared light to the sensor by transmitting the return light of the light,
6. The ophthalmologic apparatus according to claim 5, wherein the control unit automatically controls the lens driving unit based on an output of the sensor that receives the return light of the infrared light.

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