The range of pathologies which can be treated with Laser Eye Surgery
are:
* Myopia (nearsightedness): -0.75 diopters to -10.0 diopters
* Hyperopia (farsightedness): +0.75 diopters to +5.0 diopters
* Astigmatism (associated with myopia): 0 to 4.0 diopters
* Presbyopia (the eye's diminished ability to focus that occurs
with aging).
Traditionally, many of these conditions were often treated with
prescription glasses or contact lenses. Today, a number of innovative
Laser Eye Surgery procedures are widely available.
There are three main types of Laser Eye Surgery:
PRK (Photo Refractive Keratectomy) has been the standard eye laser
surgery for many years.
It involves the complete removal of the epithelium or the outer layer
of cells on the eye, with the use of a "cold" laser light.
PRK is mostly used on patients with low to moderate amounts of Myopia
Astigmatism.
Below you can watch a video showing a PRK surgical intervention:
LASEK (Laser Assisted Sub-Epithelial Keratectomy) or EPIFLAP (Laser
Assisted Epithelial Keratomileusis) surgery involves the fractional
removal of the epithelium to reveal the cornea, which is then firmed
or reshaped by a laser. The outer layer of cells is then pushed back,
and the eye heals shortly after.
LASEK is used on patients with low to moderate amounts of Myopia or
Astigmatism.
Below you can watch a video showing a LASEK surgical intervention:
LASIK (Laser Assisted in Situ Keratomileusis) is the newest and most
popular type of eye laser surgery. Initially developed by Spanish
ophthalmologist José Barraquer, with this procedure a thin layer of
the eye's cornea is sliced off to create a flap. This enables the
laser to target the tissue underneath. The flap is simply replaced and
grows back naturally. Vision is restored almost immediately.
LASIK is usually used on patients with severe Myopia
(nearsightedness): -0.75 diopters to 10.0 diopters.
Below you can watch a video showing a LASIK surgical intervention:
All of these treatments have been approved for use in many countries
around the world and are therefore considered to be safe.
But it must be taken into account that all types of surgery does
involve risks and eye surgery is no different.
There have been cases during which patients have suffered major
complications and required cornea transplants following laser
treatment.
Not everyone can have laser eye surgery. Although eye laser surgery is
usually suitable for healthy adults and can be performed on virtually
any eye, sometimes it is not advisable.
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