Preparation before surgery
24
ARveo / Ref. 10 747 384 / Version 04
7.4 Adjusting the eyepiece
7.4.1 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 zoom 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 test object with sharp contours 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.
This procedure has to be performed only once for each user.
The measured value can be stored for each user in the "User
Settings" menu under "Tube Settings" (see page 44).
7.4.2 Adjusting the pupillary distance
X
Rotate the eyecups up or down until the desired distance is set.
7.4.3 Checking parfocality
X
Place a flat test object with sharp contours under the objective
at working distance.
X
Zoom through the whole range, observing the test object.
The image sharpness must remain constant at all
magnifications. If this is not the case, check diopter settings
of the eyepieces.
