Excellent Visual Acuity
WaveLight ALLEGRETTO WAVE® lasers
customize every treatment to the patient’s individual
prescription and cornea while aiming to improve what nature originally
designed. The proprietary Wavefront Optimized® treatment considers the unique
curvature of the eye, preserving quality of vision and addressing the spherical distortions that may induce glare and affect night vision.

The Principle Behind Wavefront Optimized® Treatments
The natural shape of the human cornea is aspheric. This means that all light rays meet in one sharp focus point.

Therefore, the ALLEGRETTO WAVE® laser systems perform an ablation with the objective to maintain a natural postoperative corneal shape and thus to preserve the cornea's aspheric shape.

Every treatment is customized to the patient's individual refraction and corneal curvature by taking the K-readings into consideration.

Understanding Sphercal Aberrations
The Wavefront Optimized® technology of the ALLEGRETTO WAVE® provides optimum aspheric shape of the cornea .

Aspheric Shape Spherical aberrations manifest at ingoing light rays in the periphery. Wavefront Optimized® treatment profiles keep the natural asphericity of the cornea, hence all ingoing light rays meet in one point.
Spherical aberrations Non-aspheric ablations change the corneal asphericity and the light rays from the periphery are focused in different points which may lead to a lightly blurry image and night vision disturbances.
Spot Energy Due to the angle of incidence the light of the laser beam is ovalized increasingly towards the periphery and becomes partially reflected which results in less fluence and thus sub-optimal ablation.
Wavefront Optimized® Wavefront Optimized® laser systems place more pulses in the peripheral areas to compensate for energy loss and reflections. This provides a nearly 100% optical zone and a minimized transition zone. At the same time, the natural aspheric shape of the cornea is preserved and the induction of spherical aberrations minimized.
In these treatments the decreasing fluence and reflections are not compensated and the ablation depth in the peripheral area is insufficient. As a result, the transition bewtween the optical zone and the transition zone is less smoth, while the transition zone itself is fairly large. The non-aspheric ablation profile alters the natural corneal shape and induces spherical aberrations.

The Next Steps
With Wavefront Optimized® technology the highest quality of corrected vision is available to our patients. Ask us about this truly integrated technology that only ALLEGRETTO WAVE® by Excimer Laser System can deliver. Together we can determine whether you are a candidate for Wavefront Optimized®.