Zeiss VISULAS YAG III, User Manual

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Description of the device
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Settings of filter selector
White line pointing up: Full aperture combined with a heat-
absorbing filter.
White line to the patient: Blue filter for tonometry and
fluorescence observations.
White line to the physician: Red-free filter for contrast
enhancement during fundus
observation

A tonometer can be mounted to the slit lamp.
The tonometer support is mounted on the joint on the carrier arm.
The tonometer itself is attached by a magnet and fitted only when
required.
Beam delivery in the LSL YAG III Combi/LSL Trion Combi laser
slit lamp
The laser beam is superimposed upon the slit illumination beam path so that
the laser spot is coincident with the slit image on the fundus at all times.
This ensures that the area of the fundus which is to be coagulated is always
illuminated, even in the peripheral fundus.
This means of combining illumination and laser beams is particularly
advantageous for small illumination fields.

Note for VISULAS YAG III Combi and VISULAS Trion Combi
The prism head of the slit illumination system must be swiveled out
by about 30° before the YAG laser can be fired and the YAG laser
beam can arrive at the patient’s eye without obstruction.