Topcon TRC-50DX, Инструкция по эксплуатации

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BASIC OPERATIONS
If you cannot align the split lines into one line by operating the focusing knob, change the
diopter compensation lens by the diopter compensation lens selector.
If the split lines are not easily visible, lower the illumination level.
If one of the split lines cannot be seen, check if dilation is sufficient or if the eye is
obstructed by eyelashes or the eyelid, interrupting the light.
When the split lines are not necessary, they can be deleted from the optical finder.
Press the
, and the split lines disappear from the optical finder.
Press the again, and the split lines are displayed in the optical finder.
• How to sharply focus the retinal image:
While looking into the optical finder, turn the focusing knob so that the retinal image and
the reticles are observed sharply and distinctly in the field at the same time.
How to adjust focus easily
Press the switch of "APERTURE" (photography aperture). (This can be used in
color photography and ICG fluorescein photography (only in Type IA).)
How to photograph retinal peripheries
Have the patient watch the external fixation target correctly with the eye that is not being
photographed. Then, photograph the peripheries.
It will be possible to photograph the peripheries of the retina, by tilting and/or swinging
the main body. (Refer to P. 42.)
When photographing the retinal peripheries, the split lines are deviated. Take a picture
so that retina may be in focus.
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Set the angle of coverage.
Move the
to set the angle of coverage to 50°, 35° or 20°.
To check the angle in use, see the picture angle display on the control panel screen.
Pay attention to the relationship between flare and focus due to difference in angle of
coverage. If flare is eliminated at the 50° angle of coverage, no flare occurs at 35° or
20°. Furthermore, refocusing is unnecessary at 50° if the retinal image has already
been properly focused at 35° or 20°.
SPLIT SWITCH
SPLIT SWITCH
SMALL
ANGLE CHANGING LEVER