Step 1 : Bladeless Lasik
The traditional method of creating a corneal "flap" is to use a motorized instrument called a "keratome", which uses a blade that oscillates at high speed. Several clinics still use this technology, even though it has some additional risks.
Laservue considers "bladeless" Lasik a superior technique for the reasons explained below. For these reasons lasik with a blade is no longer used at Laservue.
In "Bladeless Lasik" the "flap" is created by a "femtosecond" laser which delivers thousands to millions of pulses per second to a precise depth in the cornea. The incision is more precise. The advantages include increased safety with a softer treatment, a smoother incision, and a flap that is more solid. This often results in a better vision after Lasik surgery.
Bladeless Lasik with the ZIEMER Z6 PLUS femtosecond laser
Our new Ziemer Z6 femtosecond laser is a first in North America. It creates a flap in the cornea using millions of tiny pulsations per second. This « megahertz » laser is 1000 times faster than other existing lasers such as Intralase, Zeiss Visumax or the Wavelight FS200. Its pulses have 30 times less energy than other femtosecond lasers, thus creating a very precise and smooth flap without post-operative inflammation. Its precision allows us to create very thin flaps (around 100 microns thick). Our surgeons popularized this "Thin Flap Lasik" method over 10 years ago.
Step 2 : Customized Lasik
LASIK consists of changing the curvature of the eye surface (cornea), allowing the light rays to be redirected to focus on the retina of the eye. It consists of 2 steps.
First a "flap" or "cap" of a fifth of the thickness of the cornea is created with a "femtosecond" laser. Secondly, this "flap" is lifted and the cornea under the flap is sculpted by the second "excimer" laser, using the new "custom" or "customized" technology.
The development of the Alcon WaveLight Allegretto EX500 was a ground-breaking moment in laser vision correction. It was the first excimer laser to be used in wavefront-guided treatments, which can measure aspects of a patient’s refractive error that cannot be detected during traditional scans, thus allowing for better visual results.
The laser comes with a variety of advanced features, including:
- Quick Speed: the laser delivers 200 individual pulses per second, thus reducing the risk of any rare, adverse outcomes.
- Beam Size: with a diameter of only 0.68mm, the small beam features a Gaussian profile for smoother ablation.
- A 500Hz Eye Tracker: this enables the laser to track the eye’s movements with only 2 milliseconds of latency, which allows for an increased speed of over 1.4 seconds per diopter
- Optical Zones: the laser features a combination of optical zones ranging from 1.5 mm to 8 mm, which reduces night vision problems in patients post-surgery.
The Alcon WaveLight Allegretto makes it possible to treat a larger area of the cornea compared to other types of lasers. Coupled with the aforementioned features, the laser allows the surgeon to create a more natural cornea shape, which results in a higher quality of vision. Specifically, the Alcon WaveLight Allegretto is known to reduce or eliminate glare and halos while driving at night and offers better visual results in low-light conditions.