How LASIK worksLASIK (Laser Assisted In Situ Keratomileusis) is a combination of two techniques It combines the submicron precision of the excimer laser with lamellar corneal surgery (a procedure that has been performed since the 1960's).
A microkeratome (an automated instrument incorporating a microblade) is used by the surgeon to gently lift a thin (130/160 micron)* layer of corneal tissue. *1 micron - 1/1000th of a millimetre.
The excimer laser then reshapes the underlying bed of cornea.
Each pulse of the laser removes 39 millionths of an inch in 12 billionths of a second. The excimer laser produces 'cool' ultra-violet light that does not cut or burn tissue.
When laser treatment is complete the thin flap of corneal tissue is replaced to its original position. It seals within minutes due to the corneas efficient bonding ability without the need for sutures.
This flap minimises the risk of infection (more common with the PRK procedure) and accelerates the healing process.
There is no immediate pain but there can be some discomfort for several hours afterwards.
In short-sighted patients, the laser is programmed to take a little more tissue from the centre, which flattens the cornea (The amount taken is often less than the thickness of a human hair).
In long-sighted patients, the laser takes more tissue from the edges in order to steepen the cornea.
In astigmatic patients the curvature of the cornea is not completely spherical - it is more elongated on several planes. The laser differentially removes tissue to provide a spherical cornea that can accurately focus light.
The Australian Institute of Eye Surgery is a purpose built LASIK facility incorporating the most advanced laser technology. We are patient focused and seek to achieve the finest possible results by the safest and most predictable means.
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