SCHWIND Amaris 500E - Protection from Unauthorized Use; Dangers Resulting from Laser Operation; Laser Radiation

USER MANUAL (Instruction for Use) SW 6.1
Safety
Version 6.1.6 dated 2020-01-31 EN Page 30 of 201
 Do not install any additional software or non- SCHWIND approved hardware on SCHWIND
systems.
IMPORTANT NOTE
The user is obliged to ensure the data storage!
Work with an updated anti-virus software package and ensure that all
incoming data are free of virus. Use virus-free storage media for transfer.
It must be ensured that only authorized staff has access to the data carriers.
2.5.11 Protection from Unauthorized Use
When not in use, the excimer laser is to be protected from unauthorized use by removing the key
from the key switch.
It is recommended to switch off the system completely by means of the main switch when the
system is intended to be not in use for a longer period (refer to chapter 6.4.3 Switch OFF the
Device.)
2.6 Dangers Resulting from Laser Operation
2.6.1 Laser Radiation
Radiation from high-performance lasers is potentially dangerous. In our case, however, the
following effects as listed below minimize danger:
 The beam diverges after passing the ablation area within a well-defined direction, so a
high energy density exists only in that area.
 The beam is partially absorbed in the air.
 The cornea does not reflect the laser beam during treatment (any reflection is only a very
weak beam).
These effects reduce the energy density of the beam quickly with increasing distance to the
working area, which is about 193 mm under the beam output opening.
For all laser models the laser area is well defined as a cone, starting from the laser aperture
underneath the laser arm downward to the floor, as shown in Figure 2-1.
The treatment plane with the focus of the laser beam is approx. 193 mm beneath the laser arm,
measured from the laser arm housing.
The area at the floor is limited to a diameter of 130 mm, due to the range of possible scanning of
the laser beam.
The Nominal Ocular Hazard Distance (NOHD-value) declares the safe distance for which the
irradiance falls off below the limit of the maximum permissible exposure (MPE) under ideal
conditions.