Iridex EndoProbe, Operator'S Manual

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Operation
13103F-EN
21
Controlling the Size of the Laser Spot
Laser spot size is controlled by positioning the probe tip near the tissue to
be treated. The probe has a spot size of 200
µ
m 3 mm from the probe tip.
To change the spot size, move the probe farther from or closer to the
target.
WARNING
The relationship between
spot size and resultant
power density is not linear.
Halving the spot size
quadruples the power
density. The physician
must understand the
relationship between spot
size, laser power, power
density, and laser/tissue
interaction.
WARNING
Excessive power settings
can result in retinal holes
and hemorrhages.
Excessive power with
short pulse durations may
result in choroidal
hemorrhage.
CAUTION
If you are uncertain of
tissue response, always
start with the lowest
power settings and
gradually increase the
power until you observe
satisfactory clinical
lesions.
3 mm
(200
µ
m spot size)
Probe tip