Refractive Lens Surgery

Fig. 23.5.
Pulse or burst
mode with
rise time
setting 2
age the capsule. In selecting a mode, it is helpful
to remember that both pulse and fixed
burst allow the surgeon to design a particular
pulse cycle pattern, which is then “locked in”
as the power is varied with the linear foot
pedal. In contrast, multiple burst “locks in” a
particular ultrasonic power and then provides
linear control of the interval or “off
time.”
Chapter 23 The Millennium 219
Fig. 23.6. The ultrasound can be “custom designed” to match any particular technique or type of
cataract
23.10 Conclusion
The Millennium gives the surgeon the ability
to access and control flow, vacuum, and ultrasound
power simultaneously and to the degree
that is necessary. It is the ability to deliver
short bursts of phacoemulsification power
and utilize vacuum as an extractive technique
– ultimately decreasing the thermal energy
delivery to the eye and speeding visual recovery
– that facilitates the use of sleeveless microincisional
cataract surgery.