Practical Application Tips For The Biom 4 - OCULUS BIOM 4 Instruction Manual

7 Use of the BIOM 4
7.4

Practical application tips for the BIOM 4

Attention
Take suitable measures to suppress uncontrolled head movements of the patient during
the surgery. These could cause injury to the patient.
Any contact of the front lens with the cornea must be avoided in general.
If, however, the lens does happen to come into contact with the cornea, the image will
immediately become blurred. In an extreme emergency, e.g. an uncontrolled downward
movement of the microscope, that cannot be stopped using the emergency stop switch
on the microscope, pull or move the complete operating microscope upwards, or shift the
BIOM 4 out of the beam path.
After a contact between front lens and the eye, swing the BIOM 4 out, or slide the safety
insertion upwards to facilitate cleaning of the optics, so that you can clean the lens with
a sterile swab.
Make sure that the cornea is sufficiently moistened with a suitable solution. This will pre-
vent damage to the cornea and will give you the optimal view into the eye.
Using the focus of the microscope during use of the BIOM 4, creates a field aperture
effect. The greater the distance between the eye and the microscope, the smaller the an-
gle of observation. This leads to the so-called "keyhole effect".
Focusing on the BIOM 4 is done manually with the adjusting wheel and can also be done
by a sterile assistant, who follows the surgery via a co-observer viewer.

For the BIOM 4c only:
Focusing of the BIOM 4c is done solely by the surgeon by means of the combination foot
switch while observing through the microscope.
Note
Adjust the ophthalmoscopy front lens rather upwards for hyperopic eyes and downwards
for myopic eyes.
Instruction manual BIOM 4 (G/54400/1011/en) 21 / 34