The Technology that Makes LASIK Life Changing

LASIK (laser-assisted in situ Keratomileusis) technology has advanced in the last few decades. In the past, many laser surgery patients complained about glare, halos, and difficulty driving at night. New technology takes this into consideration and customized LASIK techniques have been created.

At the Raleigh Eye center, the Allegretto Wave is used. The customized treatment offered with this laser incorporates wavefront technology for nearsightedness, farsightedness and astigmatism. Superior results are produced because the Allegretto Wave is one of the most accurate lasers and produces some of the largest optical zones available.

The optical zone is the area of the cornea that is corrected by the laser. The reason glare and halos often occurred after a LASIK procedure is because previous lasers did not correct the entire optical zone. The Allegretto Wave allows for the optical zone size to be customized for the individual needs of the patient.

LASIK is a two-step process which involves the creation of a corneal flap that is achieved by either a microkeratome or femtosecond laser.


The excimer laser was originally used for PRK prior to being approved for LASIK. With LASIK, a thin flap is created with a microkeratome and folded back to expose the inner layer of the cornea, called the stroma. The excimer layer gently reshapes the cornea, so when light enters the eye it lands on the retina, which allows for a clear picture.. 

The excimer laser works by breaking the bonds within cells and vaporizing them. After LASIK,  the flap is replaced and the natural suction mechanism of the cornea keeps the two layers together.


The Femtosecond laser sends direct pulses of infrared light to a specified depth within the cornea. The light pulses separate a layer of corneal tissue similar to a microkeratome.  The flap is then lifted by the surgeon to expose the stromal bed. Reshaping the cornea via the excimer laser then commences.

At the Raleigh Eye Center, Dr. Kiley often allows the patient to decide between using a microkeratome and femtosecond laser. Although patients tend to choose the microkeratome because of the price difference, excellent results are produced wih either technology.

If you want more information about the LASIK procedure, visit Raleigh Eye Center on the web: or call (919) 876-2427