JP2006043305A - Fundus camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fundus camera for easily and appropriately performing positioning for photographing, while simultaneously observing a fundus image and an anterior ocular segment image. <P>SOLUTION: The fundus camera for photographing the fundus oculi of an eye to be examined which is illuminated with photographing illumination light comprises a fundus observing optical system which has a first imaging device for imaging the fundus oculi of the eye to be examined illuminated with the observing illumination light; a monitor for displaying the image of the fundus oculi; an anterior ocular segment observing optical system which has a second imaging device for imaging the anterior-segment of the eye to be examined by optical axis which is made to be the same as the optical axis of the observing optical system; and a display control means which is the means for segmenting the image of the fundus oculi imaged by the first imaging device by a prescribed photographing field angle size so as to display the image on the monitor and displaying the image of the fundus oculi imaged by the second imaging device in the periphery of a part with the image of the fundus oculi displayed thereon, and which is the means for displaying a prescribed alignment mark indicating the desired diameter of a pupil in the anterior-segment, by overlapping it on the anterior ocular segment image and displaying the fundus oculi image in the area of the alignment mark. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fundus camera that captures a fundus image of a subject's eye.

In a conventional fundus camera, an examiner observes a fundus observation image displayed on a monitor, confirms uneven illumination, flare, and the like, and adjusts the alignment. In addition, there has been proposed an anterior ocular segment observation image displayed on a monitor together with a fundus oculi observation image so that both the ocular fundus observation image and the anterior ocular segment observation image can be observed (see Patent Document 1).
JP 2000-5131 A

  However, only by observing the fundus image, it is not easy for an examiner unfamiliar with imaging to adjust the alignment. In Patent Document 1, although both the fundus image and the anterior eye image can be observed, the anterior eye image and the fundus image are displayed in a divided format. The person needs to move the line of sight greatly from the fundus image to the anterior eye image. Also, the display of the anterior segment image is small and difficult to see. If the anterior segment image is displayed large in order to improve the visibility of the anterior segment image, a part of the fundus image is hidden. If the fundus image is reduced to avoid this, the visibility of the fundus image is adversely affected. For this reason, alignment adjustment suitable for photographing is not always easy.

  In view of the above problems, it is an object of the present invention to provide a fundus camera that can easily perform alignment suitable for photographing while simultaneously observing both a fundus image and an anterior eye image.

(1) A fundus observation optical system having a first image sensor that images a fundus oculi illuminated by observation illumination light and a fundus oculi image display in a fundus camera that images the fundus oculi illuminated by imaging illumination light And an anterior ocular segment observation optical system having a second imaging element that images the anterior ocular segment of the subject's eye with an optical axis that is coaxial with the optical axis of the observation optical system, and the first imaging element. A display control unit that cuts out a captured fundus image with a predetermined shooting angle of view and displays the image on the monitor, and displays an anterior segment image captured by the second image sensor around the display of the fundus image; Display control means for displaying an alignment mark indicating a predetermined required pupil diameter on the anterior ocular segment superimposed on the anterior ocular segment image and displaying the fundus image in the region of the alignment mark. Fundus camera characterized by that.
(2) The fundus camera according to (1), wherein the fundus image is displayed in the same size as a predetermined required pupil diameter on the anterior segment.
(3) In any one of the fundus cameras according to (1) and (2), the display control means includes the imaging optical axis position in the fundus image captured by the first image sensor and the image captured by the second image sensor. A fundus camera characterized in that an imaging optical axis position in an eye part image is substantially matched and displayed on the monitor.
(4) In the fundus camera according to any one of (1) to (3), the proportion of the fundus image in the horizontal or vertical direction of the image display of the monitor is larger than the display of the anterior segment image. A fundus camera characterized by that.
(5) In the fundus camera of (4), the anterior eye imaged by the second image sensor so that the fundus image displayed on the monitor has the same size as a predetermined required pupil diameter on the anterior eye part. A fundus camera comprising a scaling unit for optically or electronically scaling a partial image.
(6) In a fundus camera that photographs the fundus of the subject eye illuminated by the imaging illumination light, an observation optical system having a first image sensor that images the fundus of the subject eye illuminated by the illumination light for observation, and a fundus image are displayed. For imaging, an anterior ocular segment observation optical system having a second imaging element for imaging the anterior ocular segment of the eye to be examined with an optical axis coaxial with the optical axis of the observation optical system, and imaging with the first imaging means A display control unit that cuts out the fundus image with a predetermined shooting angle of view and displays the image on the monitor, and displays an anterior segment image captured by the second imaging unit around the display of the fundus image. The image pickup optical axis position in the fundus image picked up by the first image pickup device and the image pickup optical axis position in the anterior segment image picked up by the second image pickup device are substantially matched and displayed on the monitor. Fundus camera.

  According to the present invention, it is possible to easily perform alignment suitable for photographing while simultaneously observing both the fundus image and the anterior segment image.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a non-mydriatic fundus camera according to the present invention.

  The fundus camera includes a base 1, a movable base 2 that can be moved in the left and right direction (X direction) and the front and rear direction (Z direction) with respect to the base 1 by operating the joystick 4, An imaging unit 3 that can be moved three-dimensionally in the vertical and front-rear directions (Z direction) and a face support unit 5 that is fixed to the base 1 to support the face of the subject. Reference numeral 6 denotes a Y drive unit that moves the photographing unit 3 in the vertical direction, and reference numeral 7 denotes an XZ drive unit that moves the photographing unit 3 back and forth. The XZ drive unit 7 arranges a Z table movable in the Z direction on the Y table, arranges an X table movable in the X direction on the Z table, and arranges the photographing unit 3 on the X table. Then, the photographing unit 3 is moved in the XY directions by driving the Z table and the X table by motors. The Y drive unit 6 moves the photographing unit 3 in the Y direction by driving the Y table up and down by a motor. This type of three-dimensional drive mechanism can be a known mechanism. The photographing unit 3 is moved up and down by the Y drive unit 6 being operated by rotating the joystick 4. A monitor 8 for displaying an observation image or a photographed image is provided on the examiner side of the photographing unit 3.

  FIG. 2 is a schematic configuration diagram of an optical system and a control system housed in the photographing unit 3. The optical system is roughly divided into fundus illumination optical system 10, fundus observation / imaging optical system 30, focus index projection optical system 40, anterior segment illumination light source 50, anterior segment observation optical system 60, and fixation target optical system 70. It is configured.

  The fundus illumination optical system 10 includes an observation illumination optical system and a photographing illumination optical system. The photographing illumination optical system includes a photographing light source 14 such as a flash lamp, a condenser lens 15, a large ring slit 17a having a ring-shaped opening, a relay lens 18, a mirror 19, a black spot plate 20 having a black spot at the center, a relay lens 21, A perforated mirror 22 and an objective lens 25 are provided. The large ring slit 17a is provided at a conjugate position with the eye pupil to be examined. Further, the large ring slit 17a is disposed so as to be replaceable by a small ring slit 17b in which the inner diameter of the ring-shaped light beam is smaller than that of the large ring slit 17a by driving the solenoid 26. The small ring slit 17b is used to increase the luminous flux passing through the pupil when the eye to be examined is a small pupil.

  The observation illumination optical system is disposed between a light source 11 such as a halogen lamp, an infrared filter 12 that transmits near infrared light having a wavelength of 750 nm or more, a condenser lens 13, and a condenser lens 13 and a ring slit 17a (17b). The optical system includes a dichroic mirror 16 and a ring slit 17a (17b) to the objective lens 25. The dichroic mirror 16 has a characteristic of reflecting infrared light and transmitting visible light. In addition, an anterior ocular segment illumination light source 58 is disposed in the vicinity of the objective lens 25. In this embodiment, when the ring slit 17a is inserted, a subject eye having a pupil diameter φ (diameter) = 4.0 mm or more can be photographed without uneven illumination, and when the ring slit 17b is inserted, the subject eye having a pupil diameter φ = 3.7 mm or more. The camera can be photographed without uneven illumination.

  The fundus oculi observation / imaging optical system 30 includes an objective lens 25, a photographing aperture 31 located near the aperture of the perforated mirror 22, a focusing lens 32 movable in the optical axis direction, an imaging lens 33, infrared light reflection, and visible light. A dichroic mirror 34 having transmission characteristics is provided, and the photographing optical system and the fundus observation optical system share the objective lens 25 and the optical system from the photographing aperture 31 to the imaging lens 33. The photographing aperture 31 is disposed at a position substantially conjugate with the pupil of the eye E with respect to the objective lens 25. The focusing lens 32 is moved in the optical axis direction by a moving mechanism 39 including a motor. In the transmission direction of the dichroic mirror 34, a color CCD camera 35 for photographing having sensitivity in the visible range is arranged. In the optical path in the reflection direction of the dichroic mirror 34, an infrared reflection and visible light transmission dichroic mirror 37, a relay lens 36, and an observation CCD camera 38 having sensitivity in the infrared region are arranged.

  A dichroic mirror (wavelength selective mirror) 24 that can be inserted and removed as an optical path branching member is provided obliquely between the objective lens 25 and the perforated mirror 22. The dichroic mirror 24 reflects the wavelength light (center wavelength 940 nm) of the anterior segment illumination light source 58, and includes the wavelength light of observation illumination and the light source wavelength (center wavelength 880 nm) of the focus index projection optical system 40 and the like. It has the property of transmitting: The dichroic mirror 24 is retracted out of the optical path during shooting.

  The focus index projection optical system 40 includes an infrared light source 41, a slit index plate 42, two declination prisms 43 attached to the slit index plate 42, and a half mirror 44 obliquely provided in the optical path of the illumination optical system 10. . The light source 41 and the slit index plate 42 are moved in the optical axis direction by the moving mechanism 39 in conjunction with the focusing lens 32.

  The light beam of the slit index plate 42 of the focus index projection optical system 40 is reflected by the half mirror 44 via the declination prism 43, and then passes through the relay lens 21, dichroic mirror 24, and objective lens 25 to the fundus of the eye E to be examined. Projected. When the fundus is out of focus, the index image of the slit index plate 42 is separated and projected in agreement when in focus.

  Further, around the hole of the perforated mirror 22, two infrared light sources 55 (center wavelength: 880 nm) for forming working dots are arranged symmetrically about the optical axis L1. The light source 55 may be configured such that the end face of the optical fiber is disposed in the vicinity of the perforated mirror 22 and the infrared light is guided to the optical fiber. The light source 55 is disposed such that when the working distance between the eye E and the objective lens 25 is appropriate, a distance that is ½ of the radius of curvature of the cornea is a conjugate position.

  The anterior ocular segment observation optical system 60 includes a field lens 61, a mirror 62, a diaphragm 63, a relay lens 64 a and a relay lens 64 b, and a CCD camera 65 having infrared sensitivity on the reflection side of the dichroic mirror 24. The dichroic mirror 24 makes the optical axis of the fundus observation optical system coaxial with the optical axis of the anterior ocular segment observation optical system. The relay lens 64a is a low-magnification lens, the relay lens 64b is a high-magnification lens, and a lens magnification switching unit 66 switches and selects a lens to be inserted into the optical path of the observation optical system 60. Further, the CCD camera 65 images the anterior segment illuminated by the anterior segment illumination light source 50 that emits infrared light having a center wavelength of 940 nm.

  The fixation target presenting optical system 70 includes a red light source 74, a target plate 72 having eight fixation targets 71 formed with opening holes, and a relay lens 75. From the dichroic mirror 34 via the dichroic mirror 34. The optical path of the observation optical system 30 up to the objective lens 25 is shared. The fixation target 71 has an aperture that leads the vicinity of the posterior pole of the right eye to the imaging center, an aperture that guides the vicinity of the posterior pole of the left eye to the imaging center, and a line of sight so as to photograph the peripheral portion. The fixation target is selectively arranged in front of the light source 74 by the motor 73.

  In the above optical system, the anterior segment illuminated by the anterior segment illumination light source 58 is received by the CCD camera 65 from the objective lens 25, the dichroic mirror 24, and the field lens 61 via the relay lens 64 optical system. A light beam emitted from the light source 11 for fundus observation is converted into an infrared light beam by the infrared filter 12 and reflected by the condenser lens 13 and the dichroic mirror 16 to illuminate the ring slit 17. The light transmitted through the ring slit 17 reaches the perforated mirror 22 through the relay lens 18, the mirror 19, the black spot plate 20, and the relay lens 21. The light reflected by the perforated mirror 22 is transmitted through the dichroic mirror 24, and once converged in the vicinity of the pupil of the eye E by the objective lens 25, then diffuses to illuminate the fundus of the eye to be examined. The luminous flux emitted from the imaging illumination light source 14 passes through the condenser lens 15 and then illuminates the fundus of the eye to be examined through the same optical path as the observation illumination luminous flux.

  Reflected light from the fundus illuminated by the observation illumination light is the objective lens 25, the dichroic mirror 24, the aperture of the perforated mirror 22, the imaging aperture 31, the focusing lens 32, the imaging lens 33, the dichroic mirror 34, and the dichroic mirror 37. Then, an image is formed on the CCD camera 38 via the relay lens 36.

  At the time of photographing, the dichroic mirror 24 is retracted out of the optical path, and the reflected light from the fundus illuminated by the photographing illumination light passes through the objective lens 25, the perforated mirror 22, the photographing aperture 31, the focusing lens 32, and the dichroic mirror 34. The image is formed on the CCD camera 35 for photographing. The CCD camera 35 can also be used as an observation camera.

  The outputs of the CCD cameras 65, 38, and 35 are connected to the image processing unit 80. The image processing unit 80 detects the alignment index and the pupil region from the anterior segment image captured by the CCD camera 65 and detects the focus index from the fundus image captured by the CCD camera 38. The image processing unit 80 is connected to the monitor 8 and controls the display image. The control unit 81 includes a lens magnification switching unit 66, an image processing unit 80, a Y driving unit 6, an XZ driving unit 7, a joystick 4, a solenoid 26, a moving mechanism 39, a motor 73, a photographing switch 83, and various operation switches. A switch unit 84, a display switching button 84a, each light source, and the like are connected.

  The operation of the apparatus having the above configuration will be described. In the initial state of the apparatus, a low-magnification relay lens 64 a is inserted in the optical path of the anterior ocular segment observation optical system 60. Further, a large ring slit 17a is inserted so as to correspond to an eye to be examined having a pupil diameter φ = 4.0 mm or more. First, the examiner supports the subject's face on the face support unit 5 and observes the anterior segment image (see FIG. 3) of the display monitor 8 while using the joystick 4 to roughen the imaging unit 3 with respect to the subject's eye. Align. It is assumed that the fixation target 71 having an opening hole for setting the vicinity of the rear pole portion of the right eye as the imaging center is selected.

In FIG. 3, A <b> 1 is an anterior segment image captured by the CCD camera 65. N1 is an alignment mark having a size corresponding to the pupil diameter necessary for photographing, which is electrically formed by the image control unit 80, and the imaging optical axis position in the anterior segment image in which the center of the mark N1 is captured by the CCD camera 65 Are displayed on the monitor 8 so as to be the same. The examiner operates the joystick 4 so that the mark N1 and the iris of the eye to be examined do not overlap to move the photographing unit 3 in the XY directions, and also moves the photographing unit 3 in the Z direction so that the anterior eye image is in focus. The imaging unit 3 is roughly aligned with the eye to be examined.
In this alignment, an alignment index may be projected onto the eye cornea to be examined, and alignment may be performed based on the positional relationship of the projected corneal reflection image.

  When the rough alignment in the XYZ directions is completed, the display switching button 84a is pressed to switch the display on the monitor 8 from displaying only the anterior segment image to displaying the fundus observation image. The mark N1 is also used to confirm the size of the pupil diameter, and the size of the mark N1 is φ (diameter) = 4.0 mm on the anterior eye part corresponding to the insertion of the ring slit 17a. When the display switching button 84a is pressed, the relay lens 64b is inserted into the optical path by the lens magnification switching unit 66.

  FIG. 4 is a display example when switching to the display of the fundus observation image. In FIG. 4, F is a fundus image captured by the CCD camera 38, and focus index images S1 and S2 are projected at the center of the fundus image. Although not shown, actually, working dots formed by the light source 55 are displayed together with the fundus image. The focus index images S1 and S2 are separated when they are not in focus, and are projected in agreement when they are in focus. The examiner focuses the fundus image F by matching the focus index images S1 and S2.

  A2 is an anterior segment image when the relay lens 64b is inserted into the optical path. The anterior segment image A2 is displayed around the fundus image F. Preferably, the image center of the fundus oculi image F and the image center of the anterior segment image A2 are substantially coincident (substantially coincidence may be coincident with a required accuracy even if they are not exactly coincident. To say). In other words, the image pickup optical axis position in the fundus image F picked up by the CCD camera 38 and the image pickup optical axis position in the anterior segment image A2 picked up by the CCD camera 65 are displayed so as to substantially coincide. N2, like the mark N1, is an alignment mark for use in determining the pupil diameter necessary for imaging. The mark N2 is superimposed on the anterior ocular segment image A2 so as to have a size of φ (diameter) = 4.0 mm on the anterior segment in accordance with the enlarged display of the anterior segment image by inserting the relay lens 64b into the optical path. Displayed. In this example, the diameter of the mark N2 is displayed equal to the vertical length of the display monitor 8. The anterior segment image A2 is optically enlarged and displayed by the relay lens 64b with respect to the low-magnification display during coarse alignment. The magnification in this example is set so that a portion corresponding to φ = 4.0 mm in the anterior segment image A2 is equal to the vertical length of the display monitor 8. The fundus oculi image F is displayed in the inner region of the alignment mark N2, and the size thereof is the pupil diameter necessary for photographing when using the small ring slit 17b (φ (diameter) = 3.7 mm on the anterior eye portion). It is set to be the size.

As a means for enlarging the anterior ocular segment image A2 on the display monitor 8, the anterior segment image captured by the CCD camera 65 may be electronically enlarged by the image control unit 80 in addition to optical enlarging. FIG. 5 is a pattern diagram for explaining a method of displaying the fundus image F and the anterior segment image A2 displayed on the display monitor 8. The shaded portion is a portion where the anterior eye image A2 is displayed, and the plain portion is a portion where the fundus image F is displayed. The photographing field angle by the observation / photographing optical system 30 of this embodiment is 45 °, and the fundus image F is cut out at this photographing field angle. Whether the anterior eye image data of the CCD camera 65 or the fundus image data of the CCD camera 38 is displayed in advance for each address of the display monitor 8 is stored in the memory of the image control unit 80. The image control unit 80 selects one of the image signals of the fundus image F and the anterior eye image A2 for each address. Accordingly, the fundus image F and the anterior eye image A2 as shown in FIG. 5 can be displayed in real time. At this time, the image signal from the CCD camera 65 and the image signal from the CCD camera 38 input to the image control unit 80 are synchronized. In order to facilitate alignment adjustment by looking at the fundus image F, the proportion of the display area of the fundus image F in the horizontal or vertical direction passing through the center of the image display of the monitor 8 is the ratio of the anterior eye image F. It is preferable to make it larger than the display area.

  Thus, detailed alignment adjustment can be easily performed by displaying the fundus oculi image F and the surrounding anterior segment image A2. When the examiner observes the fundus image F and the iris of the anterior segment image A2 is inside the mark N2 (see FIG. 6), the pupil center of the eye to be examined is directed to the screen center of the display monitor 8. The joystick 4 is operated so that the iris and the mark N2 do not overlap. In addition, after moving the pupil center to the screen center, when the iris is inside the mark N2 and outside the outer peripheral portion of the fundus image F (see FIG. 7), the small pupil diameter It replaces with the small ring slit 17b for use.

  When there is an input from the photographing switch 83 after the alignment and focusing, the control unit 81 causes the dichroic mirror 24 to leave the optical path and emits the photographing light source 14. The fundus is illuminated with visible light by the light emission of the imaging light source 14, and the reflected light from the fundus occupies the objective lens 25, the aperture of the perforated mirror 22, the imaging aperture 31, the focusing lens 32, the imaging lens 33, and the dichroic mirror 34. Then, an image is formed on the CCD camera 35. The display on the monitor 8 is switched to a color fundus image captured by the CCD camera 35 by the image processing unit 80. The fundus image captured by the CCD camera 35 is stored in an image memory included in the image processing unit 80.

  With the configuration as described above, the screen center of the fundus image F and the screen center of the anterior segment image A2 are displayed in the same manner, so that the positional relationship between the eye to be examined and the imaging unit 3 can be easily grasped. In addition, when illumination unevenness, flare, or the like appears in the fundus image, it can be easily determined in which direction the photographing unit 3 should be moved and adjusted. Further, the mark N2 having a size corresponding to the pupil diameter necessary for photographing is displayed on the anterior ocular segment image around the fundus image F, or the same size as the pupil diameter necessary for photographing the fundus image F itself. By doing so, it can be easily confirmed whether or not the subject eye satisfies the pupil diameter necessary for imaging. If the iris (pupil) that can be observed with the anterior segment A2 is in the mark N2 or the fundus image F itself, the illumination generated in the fundus image can be achieved by preventing the mark N2 or the fundus image F from overlapping the iris. Alignment adjustment that avoids unevenness can be performed easily.

  When photographing the fundus periphery, the fixation target 71 is changed according to the target imaging region. For example, an opening of a predetermined fixation target 71 is selected so that the papilla is located at the imaging center, and the visual axis of the eye to be examined is guided. If you switch to peripheral shooting after standard imaging centered around the posterior pole, the position of the pupil part is greatly displaced by being guided to the fixation target with the visual axis of the subject's eye switched, and the fundus illumination light is blocked by the iris It becomes easy and uneven illumination occurs. In this case, the adjustment of the working dots (not shown) is also greatly shifted, and it is difficult for an examiner unfamiliar with photographing to adjust only by observing only the fundus image. On the other hand, the display of the fundus image and the anterior segment image as described above makes it easy to understand the positional relationship between the pupil and the imaging center while observing the fundus image, so that alignment adjustment for appropriate imaging is easy. it can. Further, it can be easily determined without trouble whether or not the pupil diameter of the eye to be examined is sufficient for the required pupil diameter.

  In the above embodiment, the size of the ring slit of the illumination optical system 10 can be changed to two types. However, when the size of the ring slit is one, the required pupil diameter is superimposed on the anterior segment image A2. The alignment mark N2 for determining the image size may be the same size as the contour F1 of the fundus image F cut out corresponding to the shooting angle of view. In this case, if the color of the alignment mark N2 coinciding with the contour F1 is red or blue, it is easy to distinguish between black and white observation images. Also in the display of FIG. 4, the display area from the contour F1 to the mark N2 of the fundus image F may be colored by red or the like for easy identification by the image control unit 80.

  When the alignment mark N2 shown above is displayed on the monitor 8, the examiner can perform alignment adjustment that avoids illumination unevenness that occurs in the fundus image F with reference to the alignment mark N2. It may be displayed in the area of the alignment mark N2.

It is a block diagram of a non-mydriatic type fundus camera according to the present invention. It is a schematic block diagram of the optical system and control system accommodated in an imaging | photography part. It is a figure when only an anterior segment image is displayed on a display monitor. It is a display example when switching to display of a fundus observation image. It is a pattern diagram explaining the display method of the fundus oculi image F and the anterior ocular segment image A2 displayed on the display monitor. It is a figure which shows a display screen in case the iris of the anterior eye part image A2 exists inside the mark N2. FIG. 10 is a diagram showing a display screen when the iris is inside the mark N2 and outside the outer peripheral portion of the fundus image F.

Explanation of symbols

8 Display Monitor 35 CCD Camera 38 CCD Camera 65 CCD Camera 80 Image Processing Unit L1 Imaging Optical Axis F Fundus Image A2 Anterior Eye Image N2 Alignment Mark

Claims (6)

A fundus camera for photographing a fundus oculi illuminated by photographing illumination light, and a fundus observation optical system having a first image sensor for imaging the fundus oculi illuminated by observation illumination light, and for displaying a fundus image An anterior ocular segment observation optical system having a monitor, a second imaging element that images the anterior ocular segment of the subject's eye with an optical axis that is coaxial with the optical axis of the observation optical system, and an image captured by the first imaging element A display control unit that cuts out a fundus image with a predetermined shooting angle of view and displays the fundus image on the monitor, and displays an anterior ocular segment image captured by the second image sensor around the display of the fundus image; Display control means for displaying an alignment mark indicating a predetermined required pupil diameter on the anterior segment on the anterior segment image, and displaying the fundus image in the region of the alignment mark. Fundus camera. The fundus camera according to claim 1, wherein the fundus image is displayed with the same size as a predetermined required pupil diameter on the anterior eye part. 3. The fundus camera according to claim 1, wherein the display control unit captures an imaging optical axis position in a fundus image captured by the first image sensor and an anterior segment image captured by the second image sensor. A fundus camera characterized in that an optical axis position is substantially matched to display on the monitor. 4. The fundus camera according to claim 1, wherein a proportion of the fundus image in the horizontal or vertical direction of the image display of the monitor is larger than the display of the anterior ocular segment image. Fundus camera. 5. The fundus camera according to claim 4, wherein the anterior segment image captured by the second image sensor is such that the fundus image displayed on the monitor has the same size as a predetermined required pupil diameter on the anterior segment. A fundus camera comprising a zooming unit that zooms optically or electronically. In a fundus camera for photographing a fundus oculi illuminated by photographing illumination light, an observation optical system having a first image sensor that images the fundus oculi illuminated by observation illumination light, and a monitor for displaying a fundus image An anterior ocular segment observation optical system having a second image sensor that images the anterior ocular segment of the eye to be examined with an optical axis that is coaxial with the optical axis of the observation optical system, and the fundus imaged by the first imaging means A display control means for displaying an anterior segment image captured by the second imaging means on the periphery of the display of the fundus image, and cutting out an image with a predetermined shooting angle of view size and displaying it on the monitor; The fundus oculi which is displayed on the monitor with the imaging optical axis position in the fundus image captured by the first image sensor and the imaging optical axis position in the anterior segment image imaged by the second image sensor being substantially matched. camera.