In today’s world of confusing technologies for LASIK, our patients are often confronted with choices of techniques. For Custom LASIK procedures, Walman Eye Center utilizes the technology of Topography-Guided LASIK, the newest technology of Custom LASIK that is rapidly overtaking the older technology of Custom Wavefront LASIK. What is the difference?
For the past several years, custom wavefront LASIK involved measurement of the path of light rays through the visual system with an instrument called an aberrometer. This machine sends 200 points of low energy laser light from the front of the eye to the back of the eye and returns to the aberrometer, which analyzes the defects of transmission through the eye system from front to back. Most recently, we as a profession have been more interested in topography-guided LASIK, which provides the best LASIK in Phoenix. This technique examines the image of the cornea and produces a topographical map of the corneal surface, much as a satellite flying above earth can image a topographical map of the earth showing all the hills and valleys. This topographical analysis, utilizing approximately 7000 points of light is then inputted into the excimer laser which smoothens the cornea by applying more energy to the hills than the valleys as it reshapes the cornea to bring your world into focus.
When the older wavefront technique is utilized to smooth the cornea, the information that is utilized takes into account all defects in the entire visual system – which is not actually an accurate measurement for the future, since the visual system, particularly the crystalline lens, changes from day to day and changes over time. Therefore the smoothing that is performed in this method only reflects one moment in time of a dynamically changing visual system within the eye. However, the topography of the cornea, barring major injury or disease, does not change from day to day or over a period of time, so the measurements of this topographical structure are enhancing the visual system to it’s maximum, regardless of how the rest of the visual system changes. The result is that we are maximizing the smoothness of the cornea to allow focusing and accommodate for any changes of the visual system that ordinarily occur from day-to-day and over time.
This newest of technologies has had rigorous examination through the FDA, and the results have been very clear that the smoothing of the cornea through Topography Guided LASIK statistically lessens the amount of glare at night and also statistically shows an improvement in results of clarity of vision during the day.
Walman Eye Center is the first and only facility in Arizona to provide this technique of LASIK. When deciding on this all-important change in your vision, we encourage the patient to seriously consider this technique to maximize vision results.