S
S
E
E
R
R
V
V
I
I
C
C
E
E
M
M
A
A
N
N
U
U
A
A
L
L
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ESIRIS -
- Version 1.0 Date: 22.09.00
A red blinking diode laser is used as fixation target, which can be seen from the
patient through the beam splitting mirror. The output of this laser is weakened to an
optical power of < 10
µ
W (laser class 1).
The correct working distance is aligned under control of the operating microscope
with two red pilot laser beams, one from the left and one from the right, which are
directed to the cornea in an angle. They meet at the cornea at the working distance.
As the light spot at the cornea can not be well seen, in practice the light spots at the
iris are used. In the working distance these light spots are at the right and left margin
of the small fixed iris. With enlarging the distance (driving down the patient bed) the
light spots have to move outside. With this fixation of the working distance the patient
is moved until the cornea is in the ablation point.
