4 Functional Description
Instruction manual SDI 4 (G/54320/0109/en) 5 / 21
4 Functional Description
The SDI 4 (Stereoscopic Diagonal Inverter) before you reinverts images, e.g. that of a
BIOM 4 or a wide angle contact lens.
SDI 4e/4c
The image inversion provided by the SDI 4e/4c can be turned on and off via a hand-held
pushbutton or an optional foot switch in less than a second.
If electrical adjustment is impossible for any reason, you also have the option of aligning
the optic system mechanically by hand with the adjustment knob.
You can recognize the position of the optical system by the indicator light. If it is yellow,
the image inversion feature is activated.
If adjusting mechanically by hand, turn the adjustment knob clockwise until you feel it
click into position. The indicator lights up shortly before the final position is reached.
Only SDI 4c
If the SDI 4c is used together with the BIOM 4c, the image inverter is controlled by the
position of the BIOM 4c. A position switch on board of the BIOM 4c activates the SDI 4c,
while being swung into the vertical working position.
If the BIOM 4c is out of the beam path, the SDI 4c is automatically switched off.
Independently the SDI 4c can be controlled via the combi- foot switch.
SDI 4m
Image erection with the SDI 4m can take place only by mechanical adjustment with the
hand-turned knob. You can recognize the position of the optical system by the indicator
in the transparent glass. It is centrally located on the front of the SDI 4m, just to the left
of the adjustment knob. If the transparent indicator is completely yellow, this means that
the image inversion is not taking place at the moment.
5 Proper Usage
These stereoscopic diagonal inverters SDI 4m/4e/4c reverse the picture of indirect moni-
toring systems (BIOM 4, wide-angle contact lenses) true to during minimal invasive pos-
terior segment surgery of the human eye.
The device should be used only by physicians and OP personnel who have been corre-
spondingly trained and who have the training, knowledge, and practical experience to en-
sure appropriate handling.
The SDI 4 is intended for use with correspondingly designed surgical microscopes in hos-
pitals, clinics or other places where human medicine is practiced.
Such surgical microscopes must be specifically designated by OCULUS Optikgeraete
GmbH as being compatible.
Only operate the device using original accessory parts supplied by OCULUS Optikgeraete
GmbH , and when the device is in technically correct working order.
