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Wavefront-controlled LASIK
Since the introduction of the aberrometer more than three years ago, frequent and detailed reports on "tailor-made LASIK" have been published in the media. But is this procedure really superior to standard LASIK? What advantages or disadvantages does it bring? The aberrometer, which is based on the wavefront analysis, sends a laser beam through the eye to the retina. The light is reflected through the glass body, lens, pupil and cornea. A sensor now measures the irregularity of the reflected light (wavefront) at over 50 different points and produces a precise, three-dimensional map of the eye's visual system, including all irregularities and/or aberrations. This examination enables the detection of higher order aberrations that may cause halos, glare, or distorted vision. The resulting data is entered into a mathematical formula that is then used by the surgeon to programme the laser. This makes it theoretically possible to calculate the differences in refractive power of the eye achieved by varying degrees of tissue ablation at certain points of the cornea. As a result, wavefront-controlled LASIK can, under certain conditions, improve the optical quality in eyes with higher order aberrations or irregular astigmatisms. On the other hand, wavefront-controlled LASIK has no advantage in eyes without irregularities or aberrations. The main advantage of wavefront-controlled LASIK, however, is the maintenance or improvement of night vision following refractive surgery. Whether or not wavefront-controlled LASIK will benefit you can only be determined by an extensive preliminary examination. Wavefront technology is also used in the development of contact lenses and intra-ocular artificial lenses, as well as in the diagnosis of retinal diseases. Source: Press release by the American Academy of Ophthalmolgoy (AAO) of 3 October 2003: Wavefront LASIK Advances Refractive Surgery 
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Wavefront - LaserTravel
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