Zyoptix Wavefront Guided Ablation
LASIK PROVISION offers Bausch & Lomb Zyoptix™ Custom Wavefront LASIK and PRK. This technology provides customized laser, tailored to the patient’s individual needs, and is available for an additional fee.
A new algorithm and laser treatment pattern is generated for every person by the new Zyoptix Custom Wavefront LASIK technology. The entire optical system of the eye is analysed to detect minute irregularities and distortions called aberrations. Zyoptix then tailors the excimer laser treatment to correct these very small irregularities. The information generated is computer linked to the Bausch & Lomb Z 100 small beam, flying-spot eye-tracking laser. From this process, your eyes receive a customized, individually tailored LASIK surgery where even the very small optical irregularities found on the cornea and throughout the eye will be corrected, yielding better visual outcomes.
We recommend Zyoptix for patients with higher prescriptions, large pupils, thinner corneas or a combination of these three. The benefits are listed below:
Benefits
- latest Bausch & Lomb technology
- less tissue removed (15% to 25% less compared to planoscan for any given prescription)
- preserving corneal tissue results in increased safety and longterm corneal stability
- customized treatment to each individual patient
- corrects more distortions and higher order aberrations
- allows more people to achieve 20/20 or better vision post-operatively compared to planoscan
- allows more people to have a better quality of day and night vision
The 217z 100 laser is modified during a Zyoptix™ treatment in the following ways to achieve these benefits.
- Iris Recognition, Zy-ID
- Multi-dimensional Eyetracker
- 100 Hz Laser
- Treatment Planner
- LED Illumination
- Zeiss Microscope
Iris Recognition
Ensuring patient safety with each Zy-iD.
The new Zyoptix 100 Iris recognition software creates a unique Zy-iD for every patient; it maps the entire iris, generating a unique grid based on characteristics of the patient’s unique iris features. Data gained from this pre-operative testing is mapped onto this grid. During treatment, the patient’s position is compared to the iris landmarks in the grid memory and adjustments are made to automatically correct for patient cyclotorsion and pupil shift. Greater accuracy of the laser ablation becomes possible in the treatment phase which results in better outcomes.
In addition, the Zy-iD is stored with the patient’s treatment file and used for automatic patient recognition; a secondary safety feature before treatment begins.
Multi-dimensional Eyetracker
For improved accuracy of treatment placement.
The new Zyoptix 100 Multi-dimensional Eyetracker is the most complete tracking system available with its 6.6 msec reaction time (faster than the blink of an eye), it:
- corrects for rotational movement (cyclotorsion). Since a rotational misalignment of 5 degrees can lead to an under-correction of approximately 17%, this new feature ensures greater precision of laser ablation.
- corrects for pupil shift, using the limbus ring as a reference, the Zyoptix 100 Multi-dimensional Eyetracker determines pupil centre shift between dilated and undilated images and corrects for this at the start of the treatment. Pupil centre can shift between diagnostic process (dilated pupil) and laser treatment (undilated pupil) can be as high as 500 mm which can have a significant impact on refractive error correction, especially when addressing higher order aberrations.
- corrects for movements in the 3rd dimension. The pre-adjusted treatment plane is altered if the patient presses into the headrest or the bed is moved accidentally. This can result in defocus of the ablation surface. The introduction of a second Infra-Red camera allows the laser to observe and detect a third dimension of eye movement in the z-direction. This improves desired accuracy.
- corrects for saccadic eye movements. Involuntary side to side eye movements in the x/y plane can be a source of error. The Zyoptix 100 Multi-dimensional Eyetracker incorporates active, dynamic x/y tracking to correct for these.
The Bausch & Lomb Z100 Zyoptix™ Laser is comprised of both a 1 and 2 mm scanning spot beam operating at 100 Hz ensuring a smoother and more efficient method of performing a custom ablation.
The importance of an accurate eyetracker cannot be underestimated in helping to ensure the accuracy of a personalized laser treatment. Patients often wonder if they will be “miscorrected” if they happen to move their eyes during the surgery. The Bausch and Lomb Laser video eyetracker consists of an infrared camera imaging system capturing the geometric center of the undilated pupil, plus a scanning system to respond and compensate for any pupil movement found by the camera. In fact, the B&L Eyetracker reacts in less than 11 milliseconds. More significantly, an active scanner feedback mechanism, which is found only on the B&L Technolas Z100 Laser, ensures correct scanner mirror position prior to activating a laser pulse, ensuring that the patient will receive the correction within the proper ablation zone. If the eye movement exceeds a defined range, then the eyetracker will stop the laser ablation. The new Z100 Zyoptix™ laser tracks not only in the horizontal plane ( up/down; side to side) but also in the vertical plane to ensure complete accuracy of laser beam delivery.
100 Hz Laser Source
Greatly reduces laser treatment times.
The 100 Hz Laser Source with new treatment algorithms allows the laser treatments to be twice as fast as before. This reduces flap-open time and avoids unnecessary dehydration of the corneal stromal bed. This improves safety and accuracy. Up to 40% fewer pulses are needed to treat each prescription. The enhanced laser beam homogeneity leads to optimal safety and excellent outcomes. The 1mm + 2mm Truncated Gaussian beam shape used is optimal for the best refractive outcomes.
Zyoptix Treatment Planner
Increasing the range of treatment options.
The new Zyoptix Treatment Planner: now more comprehensive than any other available system
- A new and fuller range of treatment options
- Zyoptix treatments at 100Hz; Planoscan at 50Hz
Advanced treatment algorithms are available to choose from, each using optimal 1mm and 2mm beam widths:
- Zyoptix PT (personalized treatment): Corrects pre-op higher order aberrations based on topographic and wavefront data from Zyoptix diagnostics for MYOPIA and ASTIGMATISM
- Zyoptix TS: Tissue saving properties versus Planoscan. Myopia and mixed astigmatism can be treated, with treatment based on the subjective manifest prescription only. In addition, this technology provides increased treatment optimal zones versus planoscan; enhanced treatment blend zones for improved night vision versus planoscan
- Zyoptix prolate cornea