• Excimer Laser
• WASCA

Excimer Laser

The Northern Laser Vision Centre strives to offer our Refractive patients the highest quality care and safety. For this reason we use the Zeiss Meditec MEL 80 Laser. This is currently the fastest laser on the market. The software of the MEL 80 incorporates a phenomenal eye tracker, which checks the alignment of your eye 250 times per second.

Laser Energy Delivery: This laser possesses the most current, cutting edge technology to ensure that the energy of the laser is delivered in a smooth, accurate and most importantly, a safe way. The MEL 80 is fast and precise. The increased speed reduces surgery exposure time, giving faster post operative recovery. The ultra-fast Eyetracker, ensures our correction will be precise without dilating your pupil. Our tracking software does not require pupil dilation and tracks accurately from the beginning to end of every laser procedure.

Eye Trackers: Don’t be fooled by eye tracking jargon. Even some lasers that claim to have high speed tracking actually have much slow response time than the MEL 80, which effectively makes their tracking speed much slower also. With faster tracking and response time, the MEL 80 gives higher accuracy.

Carl Zeiss Meditec hold the patents on the use of a Gaussian beam profile - the only shape that can produce a totally smooth surface through the overlap of multiple spots during treatment. Yet another feature to improve the quality of your vision.

WASCA

WASCA stands for Wavefront Aberration Simulated Customised Ablation. This is an exciting new area in Laser Vision Correction.

NU-LASE Epilift has proven to be the superior platform for the use of this groundbreaking technology. The development WASCA allows us to measure the aberrations (small imperfections) of the optical system within your eye.

This aberration measurement is then combined with cutting edge software to generate an “ablation profile”. This is then incorporated into your laser treatment to reduce aberrations giving you better quality vision.

Aberrations occur within all optical systems. They represent distortions in the path of a ray of light. Natural examples of aberrations are the way car and street lights can seem to have a halo or starburst around them at night – the lights have a surrounding fringe. Aberrations are related to quality of the light which is focussed in the retina and subsequently the quality of vision you experience.

The addition of WASCA at the Northern Laser Vision Centre has meant that we now have 37% of our patients seeing better without glasses after laser vision correction, than they could see before surgery with their glasses! The benefits of eliminating aberrations are improved night vision and reduced glare.

How WASCA works - Wavefront Analysis

In Optics there is a law of reversibility. In an optical systems, this law means that light passing into the eye and focussing on a point should be reflected back out of the system in exactly the way it entered the eye.

WASCA works by projecting a very controlled IR (infra-red) ray of light into the eye, then capturing and recording the light reflected back out of the system. If the optical system within the eye were aberration free, the beam of light would return unchanged.

When WASCA receives the reflected light, it compares it to the original beam. Any variations in the IR beam from it’s original state represent aberrations induced by the eye. This process is called wavefront analysis

The WASCA readings are displayed on a screen, with all the components of the total aberration broken down into their particular areas. Shown below are the different types of aberrations.

This “aberration profile” is the information required by the Excimer laser to reshape the cornea, with the aim of eliminating the higher order aberrations as well as the refractive error (your glasses prescription).