Abstract: An ocular fundus is photographed as an electronic image via photographic stops, and the image of the photographed ocular fundus is recorded in a recording apparatus. The photographic stops are selected by moving a movable stop unit. Alignment observation or monocular photography is performed when a center photographic stop is selected. Left and right images for stereoscopic viewing are acquired when left and right photographic stops are selected. The acquired ocular fundus images are recorded in association with the position of the photographic stop used when the images were acquired. Therefore, the left image can be displayed on the left side of the monitor and the right image can be displayed on the right side by referring to the information of the photographic stop position when the left and right images for stereoscopic viewing are displayed on the monitor. This makes reliable stereoscopic viewing of the ocular fundus possible.

Abstract: To observe interference stripes produced by tear fluid, a low magnification light source 10 is turned on to illuminate the outermost layer of a tear film on the cornea Ec of a subject's eye. Light reflected from the cornea Ec forms an image on a CCD 16, and an interference stripes pattern 18a created by the lipid film on the cornea is displayed on a monitor 18. To measure the amount of tear fluid, light-emitting elements 20a, 20b of a high-magnification light source are turned on to irradiate a tear fluid meniscus Em that has accumulated on the lower eyelid portion of the anterior ocular segment. Light reflected on the surface of the meniscus Em forms an image on the CCD 16, and images 18b, 18c of the light-emitting elements 20a, 20b are displayed on the monitor 18 as clear images separated by an interval D. The amount of tear fluid can be quantitatively measured by measuring the interval D.

Abstract: A ray of light incident via a pin hole (6) and a field stop (7) having a field of vision a predetermined angle larger than a telescope's actual field of vision that are disposed on an axis (5) in parallel to the optical axis (4) of the telescope is measured in intensity by a photoelectric element (8). When a quantity of light incident on the photoelectric element is larger than a predetermined quantity of light, a shutter (11) is inserted into an optical path of the telescope to cut off a ray of light going into the eyes of the observer. Since an incidence of a quantity of light in excess of a predetermined one into a field of vision a predetermined angle larger than the actual field of vision of the telescope will block the optical path of the telescope, a risk such as damage to the eyes of the observer can be eliminated to prevent an accident even when the observer erroneously observes a strong light-generating object such as the sun.

Abstract: An ophthalmological measuring apparatus having a laser-slit projector unit for projecting a laser beam on a portion in a human eyeball, a microscope unit adapted for receiving and observing the light reflected from the portion in the eyeball and a detector unit adapted for displaying the observing point in the eyeball projected by the laser beam.