5 Device Description
Instruction manual BIOM 4 (G/54400/1011/en)
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conditions. The BIOM 4 works as an indirect ophthalmomicroscope without corneal con-
tact during the surgery.
The patient’s eye ball can be moved freely during the surgery. Peripheral fundus portions
are thus easy to examine. This combined optical system achieves a fundus view of up to
120° in total.
The optical system of the BIOM 4 consists of the reduction lens and the front lens. The
reduction lens provides a virtually constant distance between the patient’s eye and the
operating microscope when the BIOM 4 is swung in or swung out. Individually adjusted
to the respective operating microscope, the microscope objective’s focal distance is re-
duced.
The position of the reduction lens with respect to the operating microscope is preset.
The height adjustment of the front lens is used for focusing the BIOM image. The distance
between the operating microscope and the front lens is set using the adjusting wheel at
the BIOM 4.
For BIOM 4c only
:
Press the combination foot switch to focus by means of the electric motor.
This height adjustment of the front lens brings the fundus image into the focal point of
the microscope objective.
As the image is completely reversed when the BIOM 4 is used, safe use is only guaranteed
in conjunction with a stereoscopic diagonal inverter (SDI). The SDI rights the complete
image reversal and can be switched on and off as required.
5.3
To use a BIOM 4c on SDI 3c
If this BIOM 4c (4-pin plug) should be used on the former SDI 3c (2-pin socket) version,
a plug adapter (item no. 54406) is needed.
This plug adapter should be connected with the 2-pin socket in the SDI housing.
The sterile plug of the connecting cable of the BIOM 4c then needs to be connected with
the adapter plug.
For dismantling the BIOM 4c, grip the plug of the BIOM 4c connecting cable and pull it
out of the adapter plug.
Attention
For use of a BIOM 4c, the adapter plug (item no. 54406) has to be removed from the SDI
4c housing.
