LASIK is a term for
two separate procedures designed to treat these "refractive errors."
The cornea is the clear surface of the eye. Many people who are nearsighted
place contact lenses on their eyes to improve the way the cornea focuses
light. Laser vision correction simply is another way of improving
the way the cornea focuses light by modifying the curvature of the
cornea. Laser vision correction is done on an out-patient basis with
most patients returning to their normal activities the following day.
Dr. Whitsett will help you decide which procedure or combination
of procedures is best suited for you.
Nearsightedness,
or myopia, occurs when the curvature of the cornea is too steep. With
nearsightedness, the eye's refractive power is too strong, forcing
the image to be focused in front of the retina of the eye, rather
than upon it as would be with normal vision. When light focuses in
front of the retina, near objects can be seen clearly, but far objects
appear blurry.
Farsightedness,
or hyperopia, is caused when the curvature of the cornea is too flat
and hence causes light to focus behind the retina. With farsightedness,
the eye's refractive power is too weak forcing the image to be focused
behind the retina of the eye, causing far objects to be seen clearly
and near objects to appear blurred.
Astigmatism
is caused when the cornea is shaped irregularly - like
a football or a spoon as compared to a ball or sphere, preventing
light from converging on the retina. Instead, some parts of the image
focus on the retina, while others focus behind it or in front of it.
This has the effect of bending light inconsistently and causes blurred
images. Astigmatism can occur in addition to nearsightedness and farsightedness.
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LASER
VISION CORRECTION
Laser
Assisted in-Situ Keratomileusis (LASIK)
Laser Assisted in-Situ Keratomileusis, the most advanced refractive
procedure
using
the excimer laser, combines the lifting of a thin corneal 'cap' with
the precision and accuracy of excimer laser technology. With LASIK,
our surgeon creates a thin corneal 'cap' with an instrument called
a microkeratome. Then, he gently folds back the 'cap' and uses the
excimer laser to reshape the internal tissue of the cornea. The corneal
'cap' is then replaced in its original position where it adheres quickly
and seals itself without the use of stitches.
Many
of the finest surgeons throughout the world have abandoned RK as well
as the PRK excimer laser procedure in favor of LASIK, the most advanced
excimer laser procedure available for the treatment of low to high
degrees of nearsightedness, farsightedness and astigmatism.
Laser
Assisted in-Situ Keratomileusis, the most advanced refractive procedure
using the excimer laser, combines the lifting of a thin corneal 'cap'
with the precision and accuracy of excimer laser technology. With
LASIK, your Precision Eye Laser Center surgeon creates a thin corneal
'cap' with an instrument called a microkeratome. Then, your Precision Eye Laser Center surgeon gently folds back the 'cap' and uses the
excimer laser to reshape the internal tissue of the cornea. The corneal
'cap' is then replaced in its original position where it adheres quickly
and seals itself without the use of stitches.
Many
of the finest surgeons throughout the world have abandoned RK as well
as the PRK excimer laser procedure in favor of LASIK, the most advanced
excimer laser procedure available for the treatment of low to high
degrees of nearsightedness, farsightedness and astigmatism.
About
the Excimer Laser
Since 1988, more than 2,000,000 excimer laser procedures have been
performed worldwide. Laser vision correction is projected to become
the most commonly performed medical procedure in the world. One advantage
of the excimer laser technology is its precision. This makes the excimer
laser well suited for the task of corneal reshaping and the successful
treatment of nearsightedness, farsightedness and astigmatism.
The
excimer laser is a highly precise instrument that uses a powerful
beam of cool laser light. Laser light can be directed and controlled
more precisely than normal light. The excimer laser produces a beam
of cool light that lasts only a few billionths of a second. Each pulse
removes only a microscopic amount of tissue. To put this in perspective,
each pulse removes corneal tissue measuring less than the width of
a human hair. Dr. Whitsett has performed hundreds of LASIK
procedures using the Visx Star 2 excimer laser which has been approved
for use by the FDA .
Dr. Whitsett prefers LASIK because of the precision offered
by the excimer laser combined with the faster healing time. The best
way to find out more is to schedule a free screening with our physician
and staff.
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WHAT TO EXPECT
BEFORE, DURING AND AFTER
LASER VISION CORRECTION
Before
Surgery
Before
you proceed with laser vision correction, we strongly suggest you
have a free laser vision screening at Precision Eye Laser Center.
A free screening is easy to set up, just call (361)
993-9000
to speak with one of our staff.
The
screening will help us make a preliminary determination whether you
are a candidate for laser vision correction, and if so, which procedure
would be most appropriate for you. If you schedule a free screening,
there is no obligation to move forward with the procedure.
In general, to be a candidate for laser vision correction you
should:
- be at
least 18 years of age or older
- have stable
vision for at least a year prior to the procedure
- be free
of certain diseases of the cornea and retina
- be in
good general health
Aside
from these general requirements, we recommend you have a number of
visual tests to determine whether you are a candidate. Your Precision
Eye Laser Center physician can perform these tests in his or her
office and the cost of the tests is included in the cost of y
our
laser vision correction procedure.
It is important for you to realize that even if it is determined that
you are not a candidate today, it does not mean that you will not
be a candidate as new technology becomes available. However, laser
vision correction is not for everyone, and some patients (for example,
those with certain diseases of the eye involving the cornea or retina),
will never be candidates. The best way for you to find this out is
by having a free screening with Dr. Whitsett at Precision Eye
Laser Center.
The
secondary objective of the free screening is to educate you regarding
all aspects of laser vision correction, including risks, benefits,
options and expected results.
All
of us at Precision Eye Laser Center want you to learn everything
you can about your options so you can make an informed decision. The
consultation process will help you to understand what you can reasonably
expect from the procedure.
Day
of Surgery
On the day of your procedure, you should arrive at our laser center
as rested and relaxed as possible. You should allot approximately
two hours for the entire process. You will first go through a
complete
preparation process including a personal examination, counseling,
and the administration of mild eye drops. Some patients may choose
to have valium prior to their procedure. Then, you will enter the
laser suite for treatment, which will last only a few minutes on each
eye.
The
most natural response prior to your procedure is a mixture of both
eager anticipation and nervousness. Most laser patients describe similar
feelings before their procedure, so be reassured this is extremely
normal. However, most patients' anxiety wanes as they see others going
through the process before them.
Dr. Whitsett and his staff have extensive training on all aspects
of laser vision correction.
We
use the information from your eye exam to program the state-of-the-art
computer software, which calculates the required corneal change and
then helps the laser create this change. At Precision Eye Laser
Center, Dr. Whitsett programs and operates the laser, maintaining
control throughout your procedure.
Post-Op
Once
your procedure is complete you will be able to go home almost immediately
to rest.
Additional
drops will be placed in your eyes and medication may be given to you
to use over the next few days.
Following
the LASIK procedure,
an eye shield will be placed over your eyes. The eye shield is typically
worn for 24 hours and then at bedtime for several days.
Most
patients notice dramatic visual results within the first 24 hours
following the procedure and are able to resume all of their regular
activities the next day or a day or two later.
It
is important for you to understand that follow-up care is as important
to your results as the actual procedure. Make sure that you see your
Precision Eye Laser Center doctor for all of your regularly
scheduled post-op appointments and then on an annual basis to monitor
the health of your eyes.
While
laser vision correction has proven to be overwhelmingl
y
successful in reducing dependence on glasses and contact lenses, the
degree of improvement may vary from individual to individual. Results
cannot always be predicted and can never be guaranteed. However, Precision
Eye Laser Center ophthalmologists will perform a free enhancement
within the first few months after your procedure if the patient and
the physician agree that an enhancement could be beneficial.
An
overwhelming majority of our patients tell us about the dramatic impact
the procedure has had on their lives, enabling them to enjoy everyday
activities in a way they could not before laser vision correction.
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