JP2018064991A - Ophthalmologic apparatus, image processing method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display an observation image with an appropriate display magnification for each observation state to readily position a subject eye and focus on it.SOLUTION: An ophthalmologic apparatus includes: an imaging part for acquiring an image of a subject eye irradiated with illumination light from an observation light source of an illumination optical system via an imaging optical system; a detection part for detecting an adjustment operation to an optical element of the ophthalmologic apparatus; and an image processing part for displaying an image of the subject eye on a display part at a display magnification corresponding to the adjustment operation.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an ophthalmologic apparatus, an image processing method, and a program.

  In the conventional fundus camera, the examiner aligns the eye while observing the eye image on the display unit. When this alignment is performed, the anterior segment image and pupil of the eye to be examined are first observed with a wide field of view and alignment is performed. Thereafter, the fundus image of the eye to be examined is observed and aligned.

  In observing an anterior ocular segment image, a fundus camera that electronically magnifies the anterior segment image in order to magnify and observe the observed image is known (Patent Document 1). In observing the fundus image, the fundus camera (Patent Document 2) that enlarges and displays the fundus image captured on the internal organ monitor or the center part of the fundus image is enlarged and displayed during a focus operation when focusing. A fundus camera (Patent Document 3) is known.

  On the other hand, in recent years, a general-purpose digital camera can be mounted on the optical system of a fundus camera, a fundus image can be captured by an image sensor provided in the general-purpose digital camera, and the captured fundus image can be displayed on the display unit of the general-purpose digital camera. Proposed. Further, among recent fundus cameras, there are known fundus cameras capable of photographing not only a fundus image but also an anterior eye segment.

JP 7-194546 A JP-A-5-192299 JP 2010-148586 A

  However, the display unit provided in the general-purpose digital camera is often small in size, and there is a problem in that it is difficult to see the eye image displayed on the display unit of the general-purpose digital camera when aligning the eye to be examined. In particular, if the display magnification is determined so as to facilitate alignment during observation of the fundus image, the display during anterior eye observation becomes small depending on the optical design or the like. For this reason, it becomes difficult to accurately align the anterior eye part. Therefore, when switching from the anterior eye observation to the fundus image observation, the position of the fundus image is displayed shifted, and the alignment takes time. May end up.

  In order to solve the above problems, if the optical display magnification at the time of anterior eye observation is increased, the anterior eye part is displayed in a narrow range, so the position of the anterior eye part and pupil of the eye to be examined can be grasped. It becomes difficult to do so, and it takes time to align the anterior segment. Furthermore, when the optical display magnification is increased, the photographing range of the anterior eye portion is also narrowed.

  The present invention has been made in view of the above problems, and provides a technique capable of displaying an observation image with an appropriate display magnification for each observation state, and easily performing alignment and focus adjustment of the eye to be examined. With the goal.

An ophthalmologic apparatus according to one aspect of the present invention is:
An ophthalmologic apparatus having an imaging means for acquiring an image of an eye to be examined illuminated with illumination light of an observation light source of an illumination optical system via a photographing optical system,
Detecting means for detecting an adjustment operation of the optical element of the ophthalmic apparatus;
Image processing means for causing the display means to display an image of the eye to be examined at a display magnification corresponding to the adjustment operation.

  According to the present invention, it is possible to display an observation image with an appropriate display magnification for each observation state, and to easily perform alignment and focus adjustment of the eye to be examined.

The figure which illustrates the structure of the fundus camera which concerns on embodiment. The figure which shows the function structure of the fundus camera which concerns on 1st Embodiment. (A)-(c) is a figure which shows the example of a display of the observation image of an anterior eye part, (d), (e) is a figure which shows the example of a display of the observation image of a fundus. The figure which shows the example of a setting of a display magnification. The figure explaining the flow of switching processing of observation mode switching and display magnification. The figure which shows the function structure of the fundus camera which concerns on 2nd Embodiment. (A), (b) is the example of a display of the observation image of the fundus camera concerning a 3rd embodiment, (c), (d) is a figure which illustrates the setting of display magnification.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the constituent elements described in the embodiments are merely examples, and the technical scope of the present invention is determined by the claims, and is not limited by the following individual embodiments. .

(First embodiment)
FIG. 1 is a diagram illustrating the configuration of a fundus camera as an ophthalmologic apparatus according to an embodiment of the invention. On the optical path L1, an observation light source 1 that emits infrared light, a condenser lens 2, a filter 3 that transmits infrared light and blocks visible light, a photographing light source 4 such as a strobe, a lens 5, and a mirror 6 are disposed. . On the optical path L2 in the reflection direction of the mirror 6, a ring diaphragm 7 having a ring-shaped opening, a relay lens 8, and a perforated mirror 9 having an opening in the center are arranged.

  Further, the objective lens 10 is disposed on the optical path L3 in the reflection direction of the perforated mirror 9 so as to face the eye E to be examined. In the hole portion of the perforated mirror 9, a photographing aperture 11 is disposed on the optical path L3, and a focus lens 12 and a photographing lens 13 for adjusting the focus by moving the position on the optical path L3 are disposed. FIG. 1 shows a state in which the anterior eye lens 18 is inserted on the optical path L3 between the objective lens 10 and the perforated mirror 9. The anterior eye lens 18 is connected to a moving unit 19 that moves under the control of the control unit 31, and the anterior eye lens 18 moves so as to be inserted on the optical path L3 by the moving unit 19, or on the optical path L3. It is possible to move so as to deviate from (retract from).

  Inside the retinal camera C at the end of the taking lens 13, an image pickup unit (image pickup element 14) that combines both moving image observation and still image shooting is arranged. The image sensor 14 is connected to an image processing unit 17, and a display unit 15 is connected to the image processing unit 17. The image signal from the image sensor 14 is subjected to image processing by the image processing unit 17. As image processing, the image processing unit 17 displays an image of the eye to be examined on the display unit 15 with a display magnification corresponding to the observation site of the eye to be examined or a display magnification corresponding to the operation of the fundus camera. The output of the image processing unit 17 is output to the control unit 31 and the display unit 15 (monitor). The display unit 15 displays an observation image of the eye to be examined that has been subjected to image processing by the image processing unit 17. The fundus camera C (the image sensor 14 and the display unit 15) may be configured to be detachable from the photographing optical system.

  FIG. 2 is a diagram illustrating a functional configuration of the fundus camera. The control unit 31 controls the overall operation of the fundus camera. Connected to the control unit 31 are a moving unit 19 that moves the anterior lens 18, an image processing unit 17, a light emitting circuit 30, a change detection unit 41, a storage unit 37, a display magnification setting unit 36, and an operation unit 32. . The operation unit 32 is provided with a photographing start switch 33, an observation mode changeover switch 34, a focus drive operation switch 35 that drives the focus lens 12, and an alignment adjustment switch 45 that performs relative alignment between the eye E and the fundus camera. ing. In the storage unit 37, information on the anterior eye observation display magnification 38 and the fundus observation display magnification 39 is set as the display magnification corresponding to the observation site of the eye to be examined. In addition, in the storage unit 37, information regarding the display magnification 40 at the time of focus operation is set as a display magnification according to the operation of the imaging unit (imaging device 14).

  The change detection unit 41 detects a change in observation site or a change in operation of the fundus camera. When the change detection unit 41 detects a change in the observation site of the fundus camera (for example, a change from anterior eye observation to fundus observation), the display magnification setting unit 36 displays the display magnification corresponding to the changed observation site from the storage unit 37. Is set in the image processing unit 17 as the display magnification of the display unit 15. In accordance with the display magnification set by the display magnification setting unit 36, the image processing unit 17 generates a mask having an opening at a central position that defines a predetermined angle of view of the fundus Er.

  When the change detection unit 41 detects a change in the operation of the fundus camera, the display magnification setting unit 36 acquires information on the display magnification corresponding to the operation change from the storage unit 37, and displays the image as the display magnification of the display unit 15. Set in the processing unit 17. The image processing unit 17 displays an image of the eye to be examined on the display unit 15 according to the display magnification set by the display magnification setting unit 36.

  An imaging light source 4 and an observation light source 1 are connected to the light emitting circuit 30. The control unit 31 controls the light amount adjustment / lighting / extinguishing of the observation light source 1 and the light amount adjustment / lighting / extinguishing of the imaging light source 4 via the light emitting circuit 30.

  Before performing fundus observation, an anterior eye observation is performed to perform alignment for aligning the anterior eye portion (pupil Ep) of the eye to be examined with a specified position. In the normal case of anterior eye observation, it is necessary to make the subject sit down and first find out where the eye is. Therefore, the eye to be examined is found within the display range of the display unit 15 while moving the main body of the fundus camera up and down, left and right, and back and forth, and alignment is performed. What is important here is to quickly find the eye to be examined within the display range of the display unit 15 from the viewpoint of reducing the burden on the subject and improving the efficiency of imaging, and it is also necessary to display the periphery of the eye to be examined on the display unit 15.

  When the operator operates the observation mode switch 34, the control unit 31 controls the moving unit 19 to insert the anterior eye lens 18 into the optical path L3. Next, the control unit 31 controls the light emitting circuit 30 to turn on the observation light source 1. When the observation light source 1 is turned on by the light emitting circuit 30, the anterior eye portion of the eye E is illuminated through the optical paths L 1, L 2, L 3 of the illumination optical system from the observation light source 1 to the anterior eye lens 18 and the objective lens 10. The image of the anterior segment illuminated by the observation light passes through the objective lens 10, the anterior lens 18, the perforated mirror 9, the focus lens 12, and the photographic lens 13 on the optical path L 3 as a photographic optical system, and the photographic camera. It reaches the image sensor 14 inside C. At this time, the image of the anterior segment obtained by the image sensor 14 is subjected to image processing by the image processing unit 17 and displayed on the display unit 15 at a display magnification corresponding to the observation mode of the anterior segment.

  When performing fundus observation after aligning the anterior ocular segment to a specified position by anterior eye observation, the operator operates the focus drive operation switch 35 to precisely position the eye E for fundus imaging (fundus alignment). And adjust the focus. When the observation light source 1 is turned on by the light emitting circuit 30, the infrared observation light passes through the optical paths L1, L2, and L3 of the illumination optical system from the observation light source 1 to the objective lens 10 and passes through the pupil Ep of the eye E to be examined Er. Illuminate. The image of the fundus Er illuminated by the observation light passes through the optical path L3 of the objective lens 10 and the perforated mirror 9, and reaches the image sensor 14 inside the photographing camera C. At this time, the fundus image obtained by the infrared light obtained by the image sensor 14 is image-processed by the image processing unit 17 and displayed on the display unit 15 as an observation site with a display magnification corresponding to the fundus observation mode. In the present embodiment, the image sensor 14 is common to the fundus observation and the anterior eye observation. However, the image sensor for the anterior eye observation may be different from the image sensor for the fundus observation.

  3 (a), (b), and (c) show the anterior ocular segment whose display magnification is 1 × (× 1.0), 2 × (× 2.0), and 4 × (× 4.0), respectively. It is a figure which illustrates the observation image of (pupil Ep). In the anterior eye observation, the anterior eye portion (pupil Ep) is aligned so as to be concentric with the alignment mark 50 (alignment index). When the display magnification is changed, the display magnification setting unit 36 displays the size of the alignment mark 50 by changing the size according to the display magnification. The operator operates the alignment adjustment switch 45 while viewing the image displayed on the display unit 15. By moving the fundus camera body in the up / down, left / right, or front / rear direction, the anterior segment (pupil Ep) as an observation site is aligned so as to be concentric with the alignment mark 50. Perform relative alignment with the fundus camera.

  In the case of the display magnification as shown in FIG. 3A, since the anterior eye part can be observed widely, it becomes easy to find the eye to be examined. However, since the pupil Ep is displayed small, when the display unit 15 is small, it may be difficult to accurately align the pupil Ep. If the accuracy of the alignment of the pupil Ep is low, it is difficult to see the fundus image when switching to fundus observation, and the efficiency of alignment during fundus observation is reduced. In the case of the display magnification as shown in FIG. 3C, the pupil Ep is displayed in a large size, so that the pupil alignment accuracy can be improved. However, since the observation area of the anterior segment becomes narrow, it may be difficult to find the eye to be examined. Therefore, when it is difficult to align the pupil Ep with the display magnifications of FIGS. 3A and 3C, the magnifications of FIGS. 3A and 3C as shown in FIG. Medium display magnification is good. By setting an appropriate display magnification according to the size of the display unit 15, operability for aligning the pupil Ep at the time of anterior eye observation so as to be concentric with the alignment mark 50 is improved.

  FIGS. 3D and 3E are views illustrating fundus observation images when the display unit 15 is small. FIGS. 3D and 3E each have a display magnification of 1 (× 1). .0), 1.3 times (× 1.3). The image processing unit 17 displays on the display unit 15 an image obtained by electronically synthesizing a mask having an opening at a central position that defines a predetermined field angle of the fundus image and the fundus Er. The image processing unit 17 enlarges the fundus image and the opening of the mask according to the display magnification and displays the enlarged image on the display unit 15.

  In general, for fundus observation, the position of the macula, nipple, major arteries, veins) is taken as an example when photographing at the center of the posterior pole where the macular portion Y and the nipple N are in an equal positional relationship. It is done while looking at the relationship. In FIG. 3 (e), the fundus image is displayed lacking with respect to the angle of view taken at the time of fundus observation, but does not include the macula N, the papilla Y, the main artery, and the vein of FIG. 3 (e). Only the hatched portion is missing, and the alignment is not affected. Therefore, even with the small display unit 15, alignment (fundus alignment) and focus adjustment can be easily performed.

  3D and 3E, L21 indicates the length of the display area of the display unit 15 in the short direction, and L22 indicates the length of the display area of the display unit 15 in the longitudinal direction. L23 indicates the length of the mask opening M in the L21 direction at a display magnification of 1 ×, and L24 indicates the length of the mask opening M in the L22 direction at a display magnification of 1 ×. L25 indicates the length of the mask opening M in the L21 direction at a display magnification of 1.3 times, and L26 indicates the length of the mask opening M in the L22 direction at a display magnification of 1.3 times.

  In the case of FIG. 3E, the display magnification is 1.3 times as an example, but the present invention is not limited to this example, and the magnifications to be enlarged are lengths L21, L22, L25, It is also possible to determine using L26. In the display range of the display unit 15, any magnification may be used as long as the opening M of the mask is not missing in the longitudinal direction of the display area and is missing in the lateral direction. For example, any magnification that satisfies the relationship of L22 ≧ L26, L22≈L26, and L21 ≦ L25 may be used. When the display unit 15 is small, the display case rate as shown in FIG. Note that when focusing by focus, the target portion to be focused may be enlarged to make it easier to see. In this embodiment, the configuration in which the setting of the display magnification is stored in the storage unit 37 has been described. However, the display magnification setting unit 36 has a relationship of L22 ≧ L26, L22≈L26, and L21 ≦ L25. The magnification to satisfy may be calculated (obtained) and set as the display magnification of the display unit 15. The display magnification setting unit 36 may acquire display magnification information from an external information processing apparatus via a network.

  FIG. 4A shows an example of setting the display magnification for each observation mode when the display unit 15 is small, and anterior eye photography is a photography mode for photographing the anterior eye part. FIG. 4B is an example of setting the display magnification displayed on the display unit 15 when the operator operates the fundus camera. In FIG. 4B, for example, when the operator adjusts the focus of the fundus camera, the display magnification is set to double (× 2.0). When the operator performs an operation of moving the main body, the display magnification is set to 1 (× 1.0). Here, the main body operation is an operation when the fundus camera is moved up and down, left and right, and back and forth. In FIG. 4B, the main body movement of the fundus camera is set so that the display magnification in the up / down, left / right, and front / back movement is displayed at a common 1 × (× 1.0), but is limited to this example. For example, the display magnification may be set for each of the upper, lower, left, and right sides. In the case of a fundus camera having a variable magnification or small pupil mode, the display magnification may be set for these operations.

  FIG. 5 is a diagram for explaining the flow of processing for switching the observation mode (observation site) of the fundus camera and switching the display magnification. The display magnification shown in FIGS. 4A and 4B is set. It will be explained as being. First, in step S501, the operator operates the observation mode switch 34 to start examining the eye to be examined. Note that the switching operation of the observation mode changeover switch 34 at the start of examination may be performed by the control unit 31 of the fundus camera instead of the operator.

  Next, in step S502, when the change detection unit 41 detects that the observation mode is switched to the anterior eye observation by operating the observation mode changeover switch 34, the control unit 31 inserts the anterior eye lens 18 on the optical path L3. Thus, the moving unit 19 is controlled.

  In step S <b> 503, the display magnification setting unit 36 acquires the display magnification of the anterior eye observation mode from the storage unit 37 and sets it as the display magnification of the display unit 15 in the image processing unit 17. As a result, as shown in FIG. 3B, an observation image of the anterior ocular segment when the display magnification of the display unit 15 is double (× 2.0) is displayed on the display unit 15.

  In step S504, alignment of the anterior segment is executed. The operator operates the alignment adjustment switch 45 while observing the image displayed on the display unit 15 to move the fundus camera body in the up / down, left / right, and front / rear directions, so that the eye E and the fundus camera are relative to each other. Perform proper alignment. At this time, when the operator performs the movement operation of the fundus camera body, the control unit 31 sets the display magnification of the display unit 15 to display magnification × 1 as shown in FIG. 3A while the movement operation is continued. Control to display at 0x. By changing the display magnification from 2 times (× 2.0) to 1 time (× 1.0), it becomes possible to observe the anterior eye part widely, making it easier to find the eye to be examined and quickly positioning it. Can be combined.

  After the movement operation of the fundus camera body is completed, the control unit 31 returns the display magnification of the display unit 15 as shown in FIG. 3B and performs control so that the display magnification is displayed at double (× 2.0). To do. When the display magnification is manually changed, the display magnification setting unit 36 can control the setting of the display magnification so that display is performed with the manually changed display magnification until the observation mode is changed. is there.

  When the alignment of the pupil is completed by the alignment of the anterior segment, in step S505, the operator operates the observation mode switching switch 34 to switch the observation mode from the anterior ocular observation mode to the fundus oculi observation mode. At this time, by operating the observation mode changeover switch 34, the control unit 31 controls the moving unit 19 so that the anterior eye lens 18 is removed (withdrawn) from the optical path L3. Note that instead of the operator's operation, the control unit 31 may automatically detect pupil alignment and switch to the fundus observation mode.

  In step S506, the change detection unit 41 detects that the observation mode has been switched from the anterior ocular observation mode to the fundus oculi observation mode.

  In step S <b> 507, the display magnification setting unit 36 acquires the display magnification of the fundus observation mode from the storage unit 37 and sets it as the display magnification of the display unit 15 in the image processing unit 17. As a result, as shown in FIG. 3E, an image of the fundus portion with a display magnification of 1.3 times (× 1.3) is displayed on the display unit 15. In this display magnification display, the main part of the fundus necessary for position adjustment and focus adjustment is enlarged and displayed without displaying a portion that does not hinder position (fundus alignment) adjustment and focus adjustment. According to the display magnification display, the position and focus can be easily adjusted even with the small display unit 15.

  In step S508, fundus alignment is executed. The operator operates the focus drive operation switch 35 while viewing the image displayed on the display unit 15 to perform fundus position alignment and focus adjustment. When the focus operation is completed, the display magnification setting unit 36 returns the display magnification of the display unit 15 to the original display magnification (display magnification of 1). By returning the display magnification of the display unit 15 to the original display magnification (display magnification of 1) (FIG. 3 (d)), it can be confirmed that there is no shooting error for the fundus image of a predetermined angle of view. .

  In step S509, the operator operates the photographing start switch 33 to perform photographing of the fundus image. The photographed image is displayed at a display magnification as shown in FIG. 3D in order to confirm that there is no photographing mistake with respect to the fundus image having a predetermined angle of view.

  In step S510, it is determined whether or not to end the process. For example, when only one eye is photographed in one examination, the process ends (S510-Yes). On the other hand, when the left and right eyes are photographed or when the next examination is started (S510-No), the process returns to step S501 and the same process is repeated. At this time, the control unit 31 can also control the fundus camera so that it automatically returns to the anterior eye observation of the other eye after photographing one eye.

  According to the present embodiment, by setting the display magnification for each observation state of the eye to be examined, it is possible to easily perform eye alignment and focus adjustment even with a small display unit.

(Second Embodiment)
In the present embodiment, a configuration in which an external display unit 600 different from the display unit 15 is connected to the image processing unit 17 will be described. FIG. 6 is a diagram showing a functional configuration of a fundus camera and devices connected thereto according to the second embodiment of the present invention. The same components as those in FIG. 2 are denoted by the same reference numerals and description thereof is omitted. In the functional configuration shown in FIG. 6, an external display unit 600, a selection unit 610, and a comparison unit 620 are added to the configuration of FIG.

  The selection unit 610 and the comparison unit 620 are connected to the control unit 31, and the external display unit 600 is connected to the control unit 31 via the image processing unit 17. When the control unit 31 detects that the external display unit 600 is connected by the connection detection process, the control unit 31 notifies the comparison unit 620 and the display magnification setting unit 36 of the connection. The comparison unit 620 acquires information indicating the size of the display area of the newly connected external display unit 600 via the image processing unit 17 and the control unit 31. Similarly, the comparison unit 620 acquires information indicating the size of the display area of the display unit 15 via the image processing unit 17 and the control unit 31, and displays the size of the display area of the external display unit 600 and the display area of the display unit 15. Compare the size. The comparison unit 620 notifies the control unit 31 of the comparison result of the magnitude relationship and the information on the size of the display area.

  The selection unit 610 can select which one of the display unit 15 and the external display unit 600 is used for alignment and focus adjustment using the comparison result of the magnitude relation. This selection may be based on an operator input via the operation unit 32.

  When the external display unit 600 has a display area larger than that of the display unit 15, the external display unit 600 is connected to the fundus camera from the outside, so that the anterior eye part and the fundus of the eye to be examined can be displayed on the display unit larger than the display unit 15. Can be observed. In this case, when displaying an image on the external display unit 600, it is possible to observe the entire angle of view by displaying without enlarging display. Therefore, the anterior eye observation makes it easy to find the eye to be examined by displaying a wide range, and Since the size of the display area is sufficiently large, it is easy to align the pupil. Further, in fundus observation, since the entire angle of view can be observed, alignment and focus adjustment are easy. For this reason, the selection unit 610 preferentially selects a display unit having a large display area.

  The display magnification setting unit 36 acquires information indicating the size of the display area of the display unit selected by the selection unit 610 from the control unit 31. Then, the display magnification setting unit 36 uses the information indicating the size of the acquired display area to acquire information on the display magnification corresponding to the selected display unit from the storage unit 37 and sets it in the image processing unit 17.

  The enlarged display as described in the first embodiment is a display that makes it easy to see the main part of the eye to be examined in a small display unit. When displaying on the external display unit 600 having a large display area, there is no need to perform enlarged display by setting a display magnification exceeding 1 ×. In this case, the display magnification setting unit 36 acquires information of the display magnification (1 ×) as shown in FIG. 4C from the storage unit 37 and sets it as the display magnification of the external display unit 600 in the image processing unit 17. In accordance with the display magnification set by the display magnification setting unit 36, the image processing unit 17 generates a mask having an opening at a central position that defines a predetermined angle of view of the fundus Er.

  When a plurality of display units are connected to the fundus camera via the image processing unit 17, the selection unit 610, for example, positions any of the display units 15 and the external display unit 600 for alignment and focus adjustment. Select whether to use. The display magnification setting unit 36 acquires information indicating the size of the display area from the display unit selected by the selection unit 610 via the image processing unit 17 and the control unit 31. Then, using the information indicating the size of the acquired display area, the display magnification setting unit 36 acquires display magnification information corresponding to the selected display unit from the storage unit 37, and displays it as the display magnification of the selected display unit. Set in the image processing unit 17. By using the selection unit 610, the comparison unit 620, and the display magnification setting unit 36 to automatically set the display magnification according to the selected display unit, the usability is further improved.

(Third embodiment)
In the present embodiment, a description will be given of a configuration in which, when an image is displayed on a display unit having a large display area, a plurality of images are displayed in the display area. FIG. 7A is a diagram illustrating the display of a plurality of observation images of the anterior eye part. The display 61 is an enlarged display of the observation image of the anterior eye part with a display magnification of 4 times. The display 61 is shown in FIG. ). The display 62 is for displaying the anterior segment over a wide range at a display magnification of 1. The display 62 is a display corresponding to FIG.

  In the present embodiment, as the anterior eye observation display magnification 38, a display magnification is set for each of the partial display areas (display 61 and display 62) in the display area of the display unit. FIG. 7C is a diagram illustrating setting of the display magnification for the display 61 and the display 62 in the anterior eye observation mode. The setting of the display magnification is merely an example, and various magnification settings are possible. When the display as shown in FIG. 7A is performed, the display magnification setting unit 36 obtains the information of the display magnification such as the anterior eye observation 71 of FIG. 7C from the storage unit 37 and uses it as the display magnification of the display unit. Set in the image processing unit 17.

  With the display as shown in FIG. 7A, the operator roughly aligns the anterior segment of the eye to be examined while looking at the display 62, and more accurately moves the anterior segment of the eye to be examined while viewing the display 61. It becomes possible to align with high accuracy. By setting and displaying different display magnifications in the partial areas (displays 61 and 62) of the display area, it becomes possible to combine visibility and convenience, and optimal anterior eye observation alignment is possible. The display sizes of the display 61 and the display 62 can be changed, for example, by changing the setting of the display magnification shown in FIG. 7C. Even when the display unit is changed, the display size is changed according to the size of the display area of the display unit. Optimal anterior segment alignment and focus adjustment are possible.

  FIG. 7B is a diagram illustrating the display of a plurality of observation images of the fundus. The display 65 is a display of the full angle of view of the fundus, and this display corresponds to FIG. The display 66 is an enlarged display of the fundus artery or vein, the display 67 is an enlarged display of the macular region of the fundus, and the display 68 is an enlarged display of the fundus nipple. Display 66 to display 68 are partial image displays of each part of the fundus in the enlarged display of FIG.

  In the present embodiment, as the fundus observation display magnification 39, the display magnification is set for each of the partial display areas (display 65 to display 68) in the display area of the display unit. FIG. 7D is a diagram illustrating setting of the display magnification for the displays 65 to 68 in the fundus observation mode. The setting of the display magnification is merely an example, and various magnification settings are possible. When the display as shown in FIG. 7B is performed, the display magnification setting unit 36 acquires the information of the display magnification such as the fundus observation 72 in FIG. 7D from the storage unit 37, and displays the image as the display magnification of the display unit. Set in the processing unit 17.

  With the display as shown in FIG. 7B, the operator adjusts and confirms the focus while observing the enlarged display of each part of the fundus while aligning (alignment) the fundus with the full-view angle display of the fundus on the display 65. It can be carried out. In order to check whether each part of the fundus is in focus, it is not necessary to perform an enlargement operation for each part by operating the operation unit 32, and it is possible to check the focus on the macular part, papillae, artery and vein of the fundus. Can be done simultaneously. The display sizes of the displays 65 to 68 can be changed, for example, by changing the setting of the display magnification in FIG. 7D, and even when the display unit is changed, it corresponds to the size of the display area of the display unit. Optimal fundus alignment and focus adjustment are possible.

  In each of the above-described embodiments, the configuration example of the fundus camera is described as the ophthalmologic apparatus. However, the gist of the present invention is not limited to the fundus camera. For example, when applied to OCT (Optical coherence Tomography) and SLO (Scanning Laser Ophthalmoscope), an observation image of the eye to be examined can be displayed with an appropriate display magnification for each observation state. This makes it possible to easily perform position alignment and focus adjustment with respect to the eye to be examined.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

  1: observation light source, 2: condenser lens, 3: filter, 4: photographing light source, 5: lens, 6: mirror, 7: ring diaphragm, 8: relay lens, 9: perforated mirror, 14: image sensor, 15: Display unit, 17: image processing unit, 18: anterior eye lens, 19: moving unit

Claims (5)

An ophthalmologic apparatus having an imaging means for acquiring an image of an eye to be examined illuminated with illumination light of an observation light source of an illumination optical system via a photographing optical system,
Detecting means for detecting an adjustment operation of the optical element of the ophthalmic apparatus;
Image processing means for displaying an image of the eye to be examined on a display means at a display magnification corresponding to the adjustment operation;
An ophthalmologic apparatus comprising: The detection means detects an alignment operation or a focus operation as an adjustment operation of the optical element,
When the focus operation is detected, the image processing unit causes the display unit to display the image of the eye to be examined at a display magnification larger than a display magnification when the alignment operation is detected. The ophthalmic apparatus according to claim 1. An image processing method for an ophthalmologic apparatus having an imaging means for acquiring an image of an eye to be examined illuminated with illumination light of an observation light source of an illumination optical system via a photographing optical system,
A detection step of detecting an anterior eye portion or fundus of the eye to be examined as an observation site of the eye to be examined;
An image processing step of causing the display means to display the image of the eye to be examined acquired by the imaging means at a display magnification corresponding to the detected observation site;
An image processing method comprising: An image processing method for an ophthalmologic apparatus having an imaging means for acquiring an image of an eye to be examined illuminated with illumination light of an observation light source of an illumination optical system via a photographing optical system,
A detection step of detecting an adjustment operation of the optical element of the ophthalmic apparatus;
An image processing step of displaying an image of the eye to be examined on a display unit at a display magnification corresponding to the adjustment operation;
An image processing method comprising:   The program for making a computer perform each process of the image processing method of Claim 3 or 4.

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