What
is Laser Surgery for the Eyes?
Refractive laser surgery now offers an alternative to glasses and contact lenses
in correcting vision. It can correct myopia (nearsightedness), hyperopia (farsightedness)
and astigmatism by changing the shape of the cornea with a cold laser beam.
Changing the shape of the cornea with the
excimer laser is the most technologically advanced
method of corrective surgery used on the eyes.
It offers most people who currently wear glasses
or contact lenses the opportunity for good
vision without any other form of correction.
The excimer laser is a charged mixture of
argon and fluoride gases in a mirrored tube
to produce a beam of ultraviolet light. This
beam is unique because it has the ability to
break the molecular bonds between tissue and
vaporize tissue, a microscopic layer at a time.
The laser can sculpt tissue with no effect
on the underlying and surrounding tissue. This
makes it ideal for changing the shape of the
cornea, the eye's front window, to reduce or
eliminate focusing problems.
How Does It Work?
For people with nearsightedness the
eye is usually too long and the focus
point is in the front of the retina.
The cornea is easily modified to correct
this problem by changing its shape. The
change in shape in the curvature of the
cornea counteracts the excess length
of the eye.
For people with farsightedness
the eye is usually too short and the
focus point is behind the retina. The
cornea shape is modified to counteract
the short length of the eye.
For people with astigmatism,
the cornea is normally "egg shaped" as
opposed to round. In this case, the cornea
is modified by reshaping in order for
it to focus properly. |
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The exact details of the modifications to
be made to your cornea are calculated based
on a comprehensive eye examination. The details
are programmed into the laser's computer. A
mechanical shutter regulates the laser beam
and ensures that precise sculpting of the cornea
takes place. During a procedure, the laser
is under the complete control of the surgeon
at all times.
The laser is extremely precise and in fact
a few weeks after having had the procedure,
there is little or no evidence that lasering
has taken place, other than the fact that you
are now enjoying normal vision.
Who Qualifies for the Surgery?
The FDA
has approved that the laser can be used
to correct up to twelve diopters of myopia,
four diopters of hyperopia, and up to
five diopters of myopic astigmatism.
You will receive a thorough eye examination
by your doctor before you are scheduled
for the procedure. The results of the
exam will confirm your prescription and
your potential for effective treatment. A
detailed topographical map of your eye
is made right in our office. This is
a computer generated color schematic
image of the surface of your cornea which
helps the surgeon define the precise
treatment you will require to correct
your vision. This
surgery will not eliminate the need for reading glasses which is a normal
function of the aging process. |
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What is Lasik? With
the Lasik procedure, a thin layer of the cornea
is lifted to create a "flap" that
stays connected on one side. Next the
excimer laser sculpts the cornea with a cool,
ultraviolet light. Finally, the "flap" is
returned to the original position for a quick,
natural recovery.

What is customized laser vision correction? Customized laser
vision correction is an individualized laser vision correction treatment that
is WaveScan guided. This enables the doctor to measure and correct unique
imperfections in each person’s vision that could never be measured before
with standard methods used for glasses or contact lenses. With the customized
procedure, individuals have the potential to achieve a new level of vision called
Personal Best Vision.
| ACCURATE |
The WaveScan
technology captures the unique imperfections
in your vision. This gives the doctor treatment
options that are truly individualized to
your visual needs. |
| PRECISE |
WaveScan technology produces
a detailed map of your eye—much like
a fingerprint, no two are alike. This
new level of measurement provides 25 times
more precision than standard measurements
used for glasses or contact lenses. |
| INDIVIDUALIZED |
Your treatment information
is then transferred to the Excimer Laser
providing a new level of precision and
accuracy, guiding your customized procedure. The
VISX STAR S4 Laser combines variable spot
scanning, eye tracking, and iris registration
to provide a Personal Best Vision correction. |
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