What is Custom LASIK?

Wavefront-Guided Laser Eye Surgery

Many patients do not realize that the eye is an optical system imperfect. As the rays of light from distant objects pass through the various optical components of the eye, are subject to be distorted by the imperfections found in the cornea and the lens.
The distortions that are created are referred to as “aberrations”. The vast majority - 90% or more - to create these aberrations common refractive errors such as nearsightedness, hyperopia and astigmatism, which may be optical devices such as eyeglasses and contact lenses, or laser eye surgery, using the methods of LASIK, LASEK or PRK.
The remaining 10% of optical aberrations create images that are altered by chromatic aberration, spherical aberration, diffraction, curvature of field, coma, trefoils and quadrafoils - collectively known as “higher-order aberrations.”

These higher-order aberrations occur only in a visual form of significantly by 10% to 15% of the population in general. When they occur, are entirely unique to a particular patient - much like a fingerprint. For these patients, using a wavefront-guided laser eye surgery technique to create a completely personalized remodeling of the surface of the cornea may be the best treatment option.

To achieve a customized shape the cornea will require measuring higher-order aberrations through an optical analysis system called a wavefront Aberrometer, and then the digital interface with a laser, using high-speed control computer to direct the delivery of a very small beam of laser energy across the cornea.

The Aberrometer system allows the surgeon to view the aberrations of refraction clearly and precisely, rotating 3-D images. How does Aberrometer do this? First, the Aberrometer sends low-energy laser light in the eye. The light reflected off the retina and travels back through the lens and cornea as a wavefront output. This wavefront is captured by the Aberrometer, which then steps to determine both higher and lower for the aberrations of the entire optical system.
The aberrations were displayed on a screen accurate 3-D images.
Then cree a corneal ablation personalized measurements Aberrometer digital interface that data with the Excimer Laser Surgery System eyes. The Excimer Laser Eye Surgery system incorporates the use of a high-speed computerized eye tracking method that helps Laser Eye Surgeon improve its treatment of providing accurate recording laser beam to create a customized ablation surface. Since their eyes are continually doing very well jumping movements - called saccadic “movements that are beyond their control, no matter how difficult it concentrate tracking system to help the eye surgeon by scanning thousands of times per second. Then, using computer control, makes micro-adjustments at speeds many times per second to reposition the laser beam identify between light pulses, including the monitoring of smaller and faster movements of the eye during treatment.
In addition, the Excimer Laser Eye Surgery system uses a small ultra-cold laser beam - one less than a millimeter wide, a place much smaller than the thickness of a single human hair. Using high-speed computer control, the Excimer Laser Surgery System eye moves this small ray of light across the surface of the cornea very quickly in a small, non-sequential and overlapping patterns. This helps to deliver a good corneal surgeon custom to provide quick visual recovery and correction of their individualized prescription.

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