CUSTOMVUE LASIK TECHNOLOGY
VISX Wavefront Technology!
VISX announced on May 23, 2003 that it received approval from the U.S. Food and Drug Administration (FDA) for CustomVue laser vision correction. This wavefront ablation procedure sets a new standard for vision correction, with the potential to enable better vision than with contacts or glasses.
As of December 2004, VISX has approved wavefront technology for patients with hyperopia and astigmatism.
CustomVue Advantage -The Fingerprint of Your Vision
Your vision is unique - as personal as your fingerprint or your DNA. WaveScan technology provides your eye doctor with a map of your eye.
Wavefront Technology and CustomVue
CustomVue Individualized Laser Vision Correction was developed by VISX, the company recognized for bringing innovation and breakthrough technology to laser vision correction. With CustomVue a new standard in laser vision correction is established, providing a precise level of measurement and correction never before possible.
Using Wavescan based digital technology (originally developed for astrophysics to reduce atmospheric distortions when viewing distance objects in space through high-powered telescopes) eye surgeons can now identify and measure imperfections in your eyes 25 times more precisely than with standard methods used for contacts, glasses and conventional LASIK or PRK. This information is transferred to the laser by a floppy disk and directs the laser to correct the unique imperfections, providing a new level of precision and accuracy never before possible.
Just like a fingerprint, each person's visual imperfections (optical aberrations) are 100% unique to each of their eyes. Before the recent advancements in technology, eye surgeons were only able to use standard equipment (phoropter and trial lenses) and measurements to correct vision by the Excimer laser.
This meant that prescriptions (-6.00 - 2.25 x 90 ) could only provide a certain level of laser vision correction regardless of an individual's unique vision imperfections called optical aberrations. In the past, the eye surgeon typed in the prescriptions into the laser computer and this drove the laser vision correction.
Now, the VISX CustomVue procedure utilizes the WaveScan and the STAR S4 and can measure and correct some of the unique visual imperfections (optical aberrations) so that you can achieve your personal best vision.
Initially you will meet with your eye doctor for a complete medical evaluation and eye history to determine whether you are a good candidate for the CustomVue procedure. Your doctor will discuss the benefits and risks of the procedure with you. A WaveScan measurement will be taken to map the unique characteristics of your eye. With this map, your doctor will be able to:
- Accurately assess whether you're a good candidate for laser vision correction. Anyone who is considering laser vision correction should obtain a WaveScan measurement as the first step.
- Along with the other diagnostic tests that your doctor performs, an individualized treatment plan can then be developed to address your unique vision needs.
- Once it is confirmed that you are a good candidate, your doctor will schedule you for a CustomVue procedure. Your doctor will provide details to you on how to prepare for the day of the procedure.
If your doctor feels it is beneficial, he or she may choose to provide you with a PreVue Lens during the consultation. The PreVue Lens enables you to view an approximation of your potential corrected vision prior to treatment; however, it is not meant to be predictive of your actual result. Your doctor will place a plastic lens under the laser. Using the information from the WaveScan, your unique correction will be placed on the lens. The lens is then fitted in a trial frame for viewing.
The CustomVue Procedure
On procedure day, you will be seated in a reclined position. Anesthetic drops will be placed in your eyes and a flap will be created on your cornea. Your individualized treatment information is transferred from the WaveScan to the laser in order to drive the CustomVue procedure. The actual laser procedure typically takes several seconds. Most individuals feel no pain during the procedure.
After CustomVue, you will notice results immediately, and your vision will continue to improve over the next few days. Typically, you will be scheduled for a follow-up visit the next day, again in about a week, and again around a month after the initial procedure
WaveScan Wavefront System
The WaveScan WaveFront System is an ophthalmic diagnostic instrument that measures the refractive error and wavefront aberrations of the human eye using a Hartmann-Shack wavefront sensor. The measurements can be used to determine regular (sphero-cylindrical) refractive errors and irregularities (aberrations) that cause decreased or blurry vision in the human eye. The WaveScan software uses the information to create a custom tailored correction map for the unique characteristics of each individual eye.
WaveScan technology was originally developed for use in high-powered telescopes to reduce distortions when viewing distant objects in space. This technology has now been applied to laser vision correction, measuring imperfections in the eye never before measured using standard methods for glasses and contact lenses. WaveScan-based digital technology identifies and measures imperfections in your eyes 25 times more precisely than standard methods. The powerful WaveScan software translates the information into a set of CustomVue treatment instructions for the laser. These digital treatment instructions are then transferred to the laser, driving a new level of precision and accuracy.
Until now, eye doctors were forced to practice one-size-fits-all vision. An off-the-shelf lens can correct your vision fairly well, but it is not uniquely tailored to your fingerprint of vision. Now, with WaveScan technology, your eye doctor can custom tailor a correction for the unique characteristics of your vision.
The WaveScan WaveFront System provides:
- Fourier-based wavefront algorithms:
- Fourier delivers the highest resolution available of the wavefront error
- Uses more data points to derive the optimal shape
- Uses all data from any shape of pupil
- Accurately reconstructs all peripheral data
- Captures and treats higher and lower order aberrations up to 7 mm diameter pupil
- Acuity Maps®: Chart the optical aberrations of the eye.
- Difference Maps: Track the changes of the eye for pre-op and post-op comparisons.
- Point Spread Function (PSF): Demonstrates how a patient would see a point source of light
Acuity Map® is a registered trademark of 20/10 Perfect Vision Optische Geraete GmbH