USER MANUAL (Instruction for Use) SW 6.1
Treatment Selection
Version 6.1.6 dated 2020-01-31 EN Page 155 of 201
8.5.2 Eye Tracking Quality
To avoid problems with the eye tracking system during ablation there are some parameters the
user should check before pressing the footswitch of the excimer laser.
The infrared illumination for the AMARIS eye tracking system is provided by six (6) LEDs located
at the bottom side of the laser arm (Figure 8-13).
Figure 8-13: Infrared LEDs for eye tracking system
The internal eye tracking camera of the AMARIS excimer laser detects the infrared light reflected
from the cornea and generates the eye tracking live image needed for pupil, limbus and
cyclotorsional detection.
IMPORTANT NOTE.
Covering or blocking the light from some or all infrared LEDs during the
treatment may influence the quality of the eye tracking image.
During treatment, some of the infrared LEDs may be blocked due to various reasons such as:
- Prominent nose of the patient
- Improper positioning of the patient’s head
- Surgical draping during the procedure.
This results in decreased quality of the eye tracking image and may cause, in worst case,
unnecessary longer treatment times than expected since the laser may stop for a short moment
if the quality of the live image is insufficient.
Furthermore, a bad contrast image might have an influence on the limbus detection, as well as
on static and dynamic cyclotorsional controls.
IMPORTANT NOTE.
We kindly ask to check the quality of the eye tracking live image before
pressing the foot switch to ensure a secure and uneventful treatment.
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