Chapter 2 System Overview
Part Number: 0160-6411, Rev A, 02/2019
Page 29 of 314
Software Release: cOS 5.00
System processing cannot detect the posterior lens surface and the patient’s lens thickness is
not known, the system can default to a conservative lens thickness value of 2.5 mm.
Importantly, the system-integrated
INTEGRAL GUIDANCE
System processing ensures that
adequate safety margins with respect to iris, lens capsule, and cornea are maintained regardless
of eye morphology, orientation, or tilt, thus assuring safe delivery of the treatment laser pulses.
Video Subsystem
The video imaging subsystem utilizes a monochrome megapixel video camera and collinear 735
nm light emitting diode (LED) illumination to provide constant, live imaging of the patient’s eye
through the objective lens. The video subsystem offers 40 µm lateral resolution and a 17 mm
diameter field of view. The display of clearly focused images is obtained only when immersion
fluid fills the suction ring, offering a clear indication of its presence. The images from the video
subsystem are presented to the physician during the suction ring capture procedure for
centering and verification of immersion fluid use. The video images are also used for assessing
the location of the capsulotomy pattern with respect to the patient’s iris and limbus.
Monitoring and Control Systems
The
CATALYS®
System consists of three integrated optical subsystems, each controlled and
monitored by dedicated electronics. A dedicated computer controls and monitors the Graphical
User Interface (GUI) and provides convenient storage and retrieval of system data files. The GUI
is displayed on a flat panel touchscreen located to the right of the physician. The GUI is used to
display magnified video of the patient’s eye from the on-board video camera, to enter treatment
parameters, to display the results of
INTEGRAL GUIDANCE
System imaging with treatment
pattern locations overlaid upon it, and to initiate the treatment.
WARNINGS
The
(laser emission) indicator is displayed on the touchscreen control panel at all times the
laser is energized to warn the user that the system is capable of emitting laser energy.
If the control panel is blank, do not use the system. If the screen remains blank for more than 30
seconds, turn off the system with the key, wait at least one minute, and then restart the system.
If the screen is still blank, turn off the system and contact
OPTIMEDICA
Service.
The system is controlled by a dedicated field programmable gate array (FPGA) and is accessed
via the host computer. The host computer passes information between the user (via the GUI)
and the FPGA control system. The Operating System (OS) within the host computer is not used
for any critical system operation, nor is it used for safety monitoring, other than to regularly
query (“watchdog”) the FPGA and vice-versa. Critical system operations and safety monitoring
are executed using dedicated deterministic parallelized circuitry on the FPGA.
