Lenticular extraction with the Ziemer Z8 femtosecond laser: Clear

Precise centering of the refractive lenticule is essential to ensure that lenticule extraction produces optimal results. The Ziemer Z8 can center on the pupil center, the fixation light or a corneal marker. The surgeon can also perform cyclotorsion correction or individual centering of the lenticule.

The centering can be controlled with a touchscreen – after the eye is docked under vacuum. Cyclotorsion correction is particularly important when correcting astigmatism.

When developing the Femto LDV Z8 laser, Ziemer worked towards achieving maximum precision and minimum stress. In order to work as gently as possible on tissue, only a small amount of laser energy is used per pulse. In return, the laser beam achieves a high repetition rate. The result is overlapping laser spots for continuous cuts without tissue bridges and clean cut edges or a smooth stromal bed. Thanks to the low-energy concept, the laser can work closer to the eye and the energy used is focused as precisely as possible.

The dense pulse grid ensures additional precision. The Ziemer Z8 is considered highly precise and is characterized by the fact that the results can always be predicted in advance with a high degree of probability.

Ziemer has developed its own OCT system for its Femto LDV Z8. OCT stands for optical coherence tomography and was developed for use in the cornea and lens. The use of this assistance system offers the surgeon and patient the following advantages:

• Image of the lens and cornea for individual adjustments to the procedure
• Previous procedures can be viewed again before the next operation – in order to localize existing flaps or other scarring.
• Easier planning of tiny incisions
• Automatic recognition of the edges of the individual eye sections: Pupil, iris, cornea, lens, etc.
• Automated suggestion of the resection width

For additional safety and a smooth procedure, the Ziemer Z8 is equipped with a patient interface (PI), which supports the surgeon before, during and after the procedure with intuitive control and process-optimized data management.

The Ziemer Z8 has a special handpiece which, in combination with the swivel arm, ensures that the device can be easily and precisely docked onto the patient’s eye. The contact element creates a constant suction during the entire procedure with the computer-controlled vacuum.