The VISX Star S4 Laser System offers variable spot beam technology meaning that it adjusts the laser beam size according to the individualized treatment plan, minimizing corneal tissue removal. This also allows for quicker treatment times that are typically between 10 to 40 seconds.

This laser also provides a larger treatment or ablation zone. The surgeon can also call upon Variable Spot Scanning technology to add a blend zone that allows the treatment on the cornea to be extended to 8 mm that may help reduce the risk of night vision symptoms such as glare and halos.

The VISX STAR S4 Excimer Laser System uses the ActiveTrak 3-D Eye Tracker, a positioning device that uses infrared cameras to actively follow the tiniest motions of the eye in all three dimensions. This allows your Woolfson LASIK surgeon to place the laser treatment on the cornea with greater precision and accuracy despite eye movement during the procedure.

VISX CustomVue Individualized Laser Vision correction within the ViSX WaveScan System allows your surgeon to personalize your laser eye surgery, giving you treatment options that are truly customized to your visual needs.

Until recently, standard laser vision correction has treated "second-order" optical aberrations, or irregularities primarily involving your cornea that are responsible for vision problems like nearsightedness, farsightedness and astigmatism. But this conventional approach does not take into account the eye's so-called "higher-order" aberrations — that is, the imperfections of the eye that decrease the quality of your vision without necessarily decreasing your ability to see the letters of an eye chart.

At Woolfson Eye Institute (WEI), our surgeons can treat these problems with VISX CustomVue™, an individualized laser vision correction procedure. Guided by your surgical team’s deep experience, the VISX WaveScan system maps the entire visual system to detect and measure all imperfections that have gone previously undetected, creating a unique fingerprint of your vision.

The resulting diagnostic information is converted to a WaveFront Map and this individualized treatment information is transferred directly to the VISX Star S4 laser. The WaveFront Map guides the treatment, resulting in extremely precise, individualized vision correction outcomes that would be impossible with traditional LASIK surgery, contact lenses, or eyeglasses.