PASCAL
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Synthesis Ophthalmic Scanning Laser Systems Page 19 of 141
88292-EN, Rev D
Non Homogeneous Pattern Delivery
The optical system in this unit has been designed to provide uniform laser energy deposition over
the entire area of a focused spot. If proper focus of the laser spot on its intended target is not
achieved, or if damage, contamination, or deterioration of the optical components has occurred,
it is also possible to degrade this uniformity. Observation of aiming laser spots should provide
suitable indication of the level of uniformity attainable in any given system configuration, and
treatment should proceed only when the user is satisfied as to the level of laser deposition
uniformity by observation of properly focused aiming laser spots. Service personnel should be
contacted for any concerns in this regard.
Treatment with laser deposition that is highly non-uniform can result in localized over- and/or
under-treatment of the affected areas.
The larger the pattern, the more likely that spots within the pattern would be non-uniformly
delivered. Smaller pattern sizes may be less likely to produce non-homogeneous lesions than
larger patterns.
There are other variables which may contribute to non-uniform pattern laser application,
including, but not limited to the following: media opacities (i.e. cataract) and heterogeneity
within a particular opacity; ischemic retinal changes; other situations where there is no visible
retinal/media non-homogeneity.
Fiber Optic Cable Assembly
Use extreme care with the cable assembly to/from the console. The cable assembly consists
of wiring and fiber optic cables.
Do not pull or stress any cables. Do not exceed bend radius of 15cm Do not set items on or
under the cable assembly.
Damage to the fiber optic cables may cause unintended laser exposure.
Pattern Titration
The Physician is expected to show discretion in the dosage and location of the laser delivery
when using the Pattern Titration feature. It is the responsibility of the physician to select the
appropriate power and treatment location.
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