Preparation before surgery
26
PROVIDO Ref. 10732418 / Version 03
PROVIDO Ref. 10732418 / Version 03 27
7.4 Setting the binocular tube
7.4.1 Setting the interpupillary distance
X
Adjust the interpupillary distance to a value between 55 mm
and 75 mm.
X
Using the adjusting wheel (1), set the interpupillary distance
such that a circular image field can be seen.
2
1
7.4.2 Adjusting the tilt
X
Hold the binocular tubes with both hands.
X
Tilt the binocular tube upwards or downwards until a
comfortable position for viewing is reached.
7.5 Adjusting the eyepiece
7.5.1 Determining/adjusting diopter settings for
users
The individual diopters can be adjusted continuously for each
eyepiece from +5 to –5. The diopters must be set exactly and
separately for both eyes. Only this method will ensure that the
image will stay in focus within the entire magnification range =
parfocal. The surgical microscope ensures a high degree of fatigue
resistance when the diopter setting is correct for both eyes.
A parfocally adjusted microscope ensures that assistant's
view and monitor image will always remain sharp,
regardless of the selected magnification.
X
Select the minimum magnification.
X
Place a flat object with sharp contours on monitor under the
lens at working distance.
X
Focus the microscope.
X
Set the maximum magnification.
X
Focus the microscope.
X
Set the minimum magnification.
X
Without looking into the eyepieces, turn both eye lenses to
+5 diopters.
X
Slowly turn the eyepieces towards –5 individually for each eye
until the test object appears in sharp focus.
X
Select the highest magnification and check the sharpness.
7.5.2 Adjusting the pupillary distance
X
Rotate the eyecups up or down until the desired distance is set.
