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TECHNICAL INFORMATION

In order to provide you with the best possible laser eye treatment, we constantly research and test the latest technology and equipment ensuring you receive the best results.

To find out more about the technology we use in laser eye surgery and the proven results achieved, click on the tabs below or watch the video from our surgeon Dr Stephen Doyle, Ophthalmologist, MBBS, BSc (Hons), MRCOphth.

 

 

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Allegretto Eye-Q

Allegretto Eye-Q is one of the fastest lasers in the world - ideal for laser eye surgery.
PerfectPulse Technology ensures safety and accuracy to deliver outstanding visual results.
The equipment at Visualase has the ability to perform Wavefront Optimised treatments.

A 400Hz ablation rate makes the Eye-Q one of the fastest lasers in the world and its unique PerfectPulse Technology ensures safety and accuracy in combination with outstanding visual results.

Aside from the ability to perform Wavefront Optimised™, wavefront-guided or topography-guided treatments, the Eye-Q features Custom Q, the first treatment module that allows the customization of corneal asphericity. The WaveLight customisation toolkit comprises several different treatment types that can be combined with the laser systems and diagnostic devices to maximise the results for the patient.

  • Wavefront Optimised™
  • Wavefront-guided
  • Topography-guided
  • Custom Q for the ashericity-guided treatments, customised refraction and optical zone entries.
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Visual Acuity

WaveLight is a pioneer in wavefront research. The very first wavefront-guided treatment ever was performed with a WaveLight device.

Standard treatments that do not take the natural aspheric shape of the cornea into consideration induce spherical aberrations.

WaveLight lasers are the only systems to use Wavefront Optimised™ ablation profiles as part of their standard treatments. This prevents or reduces the induction of spherical aberrations, resulting in better night vision and less sensitivity to glare.

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Wavefront Optimisation

The natural shape of the human cornea is aspheric. This means that all light rays meet in one sharp focus point.

Therefore the WaveLight laser systems perform an ablation with the objective to maintain a natural post-operative corneal shape, thereby preserving the cornea’s asphericity.

Every treatment is customised to the patient's individual refraction and corneal curvature, by taking the eye curvature into consideration.

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Ultra Fast Eye-tracking

Using a fine laser beam at high speed, the WaveLight laser systems rely on their synchronous, video-based, active eye-tracker to follow even the fastest eye movements, with a response time of less than six one thousands of a second!

As a pupil-based system, it tracks pupils between 1.8mm and 8.0mm, while the automatic centring mode ensures perfectly centered ablations.

The closed loop tracking mode reconfirms the eye’s location again before a pulse is placed on the cornea to ensure that every pulse goes into the desired location.

To monitor the patient’s eye, the active eyetracker utilises three infrared light sources to clearly detect the contrast between pupil and iris.

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PerfectPulse Technology

WaveLight laser systems apply PerfectPulse Technology to ensure safe and precise work at high speed.

PerfectPulse Technology simply means that every laser pulse is completely controlled from its generation to the point when it contacts the cornea.

Each ultra-thin laser pulse is used to sculpt the corneal surface with the upmost precision.

In order to further enhance the safety and precision of the treatment, PerfectPulse Technology uses advanced high-speed eye-tracking to follow the eye’s fast movements, and to ensure an accurate placement of each laser pulse on the cornea.

During the treatment, the energy stability of every pulse is controlled on the basis of a smart energy control programme, which automatically balances the energy levels to ensure that each laser pulse creates the same accurate result.

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Surface Quality

The WaveLight laser systems’ Gaussian beam profile ensures a smooth ablation without grooves or ridges, while the tiny 0.68mm (FWHM) spot size provides a precise ablation of corneal tissue, and very small transition zone.

In addition, it guarantees improved control of the pulses’ shape and also maximum uniformity of each emitted pulse due to the different energy density (power in the centre and less in the periphery).

WaveLight laser systems are the only ones on the market to adjust the beam profile and energy distribution with a special optical electronic beam analysing system. This ensures best shape of the Gaussian beam profile and smoothest surface qualities.

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Quick Visual Recovery

The Eye-Q works with a pulse frequency of 400 Hz. This results in a correction time of only 2 seconds per dioptre (considering a fully corrected optical zone of 6.5mm). Thus, the average myopia correction takes about as little time as pouring a cup of coffee.

The rapid repetition rate also results in expedited vision regeneration, more comfort for the patient and a minimisation of external influences.

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Closed Loop Energy Control

The intergrated closed loop energy control guarantees a stable energy flow throughout the treatment. This ensures higher precision and safety.

As part of the advanced PerfectPulse Technology, the closed loop energy control system manages the energy levels of every laser pulse during the treatment. At several points throughout the laser beam path, the pulse energy is determined and output energy is automatically regulated in order to ensure stability.

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Improved Night Vision

In order to maintain the patient’s refraction and corneal curvature, it is important to understand the behaviour of every laser pulse when it meets the eye. When laser light hits the centre of the cornea, it is fully absorbed. However, in the periphery, the angle of incidence resulting from the cornea’s curved shape will cause energy reflections.

WaveLight laser systems apply additional pulses in these peripheral areas to compensate for the energy loss, and to achieve the desired post-operative aspheric contour even in the outer areas of the cornea. In order to precompensate for the possible induction of spherical aberrations, the laser applies even more pulses depending on the patients’s individual corneal steepness.

The effect of higher order aberrations increases with pupil size. Hence the effective optical zone size should correspond with the pupil. Large transition zones induce higher order aberrations, thereby fostering vision problems such as halos and glare.

Controlling the peripheral ablation allows the laser to create large, true optical zones with a minimised transition zone. This results in better vision under conditions when the pupil is enlarged, for example, at night or in dusk.

By treating larger optical zones with a diameter of up to 8mm, post-operative glare and halos are minimised.

In the ALLEGRETTO WAVE clinical trials conducted by the FDA (U.S Food and Drug Administration), for instance, patients reported that their night-driving glare had improved after the treatment.

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Proven Results

FDA-Approved Outcomes: Results from US Clinical Trials (with the 200Hz ALLEGRETTO WAVE).

Results from US clinical trials for wavefront-guided vision correction and comparison to Wavefront Optimised™ correction.

Most important clinical outcomes:

WFO (Wavefront Optimised™) & WFG (wavefront guided) study groups

  • 93% on patients achieved UCVA 20/20 or better
  • More than 85% of all patients (WFG and WFO) saw at least as good or better without glasses after treatment than before with glasses
  • 0% enhancement rate in the WFO group
  • 2.7% enhancement rate in the WFG group
  • Low contrast acuity improved in patients with significant pre-op RMSh
  • No symptomatic increase in aberrations observed after WFO or WFG LASIK
  • WFG LASIK proven to reduce aberrations, specifically trefoil and spherical aberrations (patients upto -4.00D or more than 0.3um RMSh)
  • WFO LASIK also reduced aberrations in patients with pre-op RMSh less than 0.5um.

Most important subjective outcomes:

WFO (Wavefront Optimised™) & WFG (wavefront guided) study groups.

  • At stability, most patients (88.9%) would highly recommend the treatment to a friend, 97.5% would probably or highly recommend it
  • Over 90% of patients rated their visual quality good or excellent after treatment (WFG 94.5% / WFO 92%).

Important distinctions in the FDA approval:

Custom offset of sphere and cylinder

  • The ALLEGRETTO WAVE is the first system to allow a wavefront-guided offset of -3.00D to +1.00D for sphere and -3.00D to 0.00D for cylinder
  • The ALLEGRETTO WAVE is the first laser system to allow surgeon adjustment of the cylinder settings.

WaveLight is the only company in the market that has proven the ability to reduce higher order aberrations!