Technical side

Femtosecond intralase ifs laser

The Femtosecond Laser emits in infrared, its wavelength is 1,053 nanometers.
The Femtosecond Laser surgery consists in cutting the corneal flap with an all laser Lasik called Femtolasik or Ultralasik.

Cutting the flap is performed in about fifteen seconds, using very low energy.
Compared to the old manual techniques, the Femtosecond laser has the advantage of cutting the flap very safely and more accurately.

Finer and more predictable cuts are now possible, broadening the scope of potential indications based on the ametropia / pachymetry ratio.

The principle is very simple. A conjunctival suction ring at the limbus is placed to receive an applanation cone for delivering the laser beam.

The complications observed in the past with mechanical cuts are now very rare. Loss of suction can happen but repositioning is often possible right away. Don't forget that a Femtosecond Laser cutting is a pre-cut and as long as the flap is not raised, there cannot be consequences on vision.

The surgeon defines the geometry of the flap, its depth, shape of the edges, positioning of the hinge.

Laser excimer

  • Principles

The Excimer laser has a wavelength of 193 nm and emits ultraviolet light. It enables corneal photoablation, meaning that with each impact, a very small amount of corneal stroma is ablated.
Today, laser surgery is a proven technique. The effectiveness of this type of laser has been shown for many years and controlled by independent authorities such as the American FDA (Food and Drug Administration).
PKR, Lasik, and finally Femtolasik technologies have helped millions of people in the world to break free from contact lenses or glasses wearing.


  • WaveLight Allegretto

This laser is very reliable, efficient, predictable and highly safe.

The spot delivered is small in diameter (0.9 mm) allowing a very fine profile of ablation, so it is very precise. The treatment offers exceptional homogeneity and every patient receives ablation respecting the natural prolaticity of the cornea to the most.

The systematic aspheric treatment improves visual comfort even with a significant refractive disorder.
There is little tissue ablation with this laser, which makes it available to severe ametropia and provides early refractive stability.

With the perfect pulse technology of this laser device, stability and control of energy are reinforced, which makes it less dependent on environmental factors.
With its high frequency, the speed of treatment delivery is one of the fastest and is an additional guarantee of accuracy.
The always active eyetracker and the original cyclotorsion control add to its technical qualities.

These quality features of the Allegretto WaveLight laser are the default configuration, no additional card is needed, so all of these benefits are available at no extra costs.

Aberrometric and topolink treatments can be offered for special cases.

Finally, the F-Cat module allows the surgeon to set up the profile of ablation differently by setting the aspheric Q factor. A controlled change of asphericity is necessary in some cases of presbyopia surgery to bring more comfort and vision efficiency with increased depth of field.