VISX is recognized as a world leader in excimer laser development.
In 1998 VISX released their upgrade of the older VISX Star model calling
it the VISX Star S2. The primary advantage to the S2 over the older Star model was
the delivery of a significantly smoother laser ablation than the S2’s
predecessors. In keeping with their
spirit of innovation and leadership in the industry, in recent months VISX
has introduced a
sophisticated infrared eye tracking system in the form of the newly released S3.
VISX S3 laser platform uses a seven-beam scanning system to produce a smooth
corneal surface. The laser system
actually splits the beam into an array of seven small diameter beams that rotate
across the cornea during the laser procedure smoothing and softening the
treatment pattern and reduce surface artifacts.
An additional feature of the VISX laser platform is that the array of
seven laser beams allows the laser procedure to be performed more rapidly than
many other laser systems.
tracking system is infrared video based and tracks the eye at a rate of 60Hz.
Thus the eye position is verified and safety checked before every laser
pulse and continues to monitor between pulses.
This gives greater patient confidence and lowers apprehension.
Visx Star S3 Ablation Profile
prone to create unwanted side effects such as nighttime glare or halos due
to limitation of a 6.0 to 6.5 mm optical zone. Although for many patients, the 6.5mm treatment area is
More difficult to compensate for rotational eye movements during
the laser procedure which may decrease the lasers accuracy in treating
No “hinge” protection software capability requires the
surgeon to manually shield the hinge area of the flap during LASIK surgery
Heat generated at the corneal surface
by a large laser beam appears to be greater than with small spot scanning laser
technology. Although minor in
effect, this heat may cause increased damage to the cellular structure of the
cornea and slightly delay corneal healing.