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Laser
Vision Correction is one of the most exciting procedures that we
offer. Worldwide over two million Laser Vision Correction procedures
have been performed, and last year in the United States there
were nearly 900,000 procedures performed. For
millions of people who are nearsighted, farsighted, and/or have
astigmatism, Laser Vision Correction is a procedure which may eliminate
or reduce the need to wear glasses or contact lenses.
Excimer
Laser Vision Correction is a state-of-the-art technology in which
a computer controlled cool laser reshapes the surface of the cornea.
The Excimer Laser has been used since 1989 to treat nearsightedness.
Lasik has been performed internationally for 10 years and clinical
trials were begun in the United States in 1991. The FDA approved
the excimer laser to treat nearsightedness in 1995.
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Nearsightedness
or myopia occurs when the curvature of the
cornea is too steep. This results in images being focused in front
of the retina. In these patients near images are in focus, while distant
images are blurred. |
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Farsightedness
or hyperopia occurs when the curvature of
the cornea is too flat. This results in images being focused behind
the retina. In these patients, distant images are in focus, while
near images are blurred. |
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Distortion
or Astigmatism is a condition in which the
corneal curvature is unequal, or shaped like a football. This results
in blurred or distorted images. |
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The
Procedure
The
Excimer Laser is used to perform two types of vision correction
procedures: PRK and LASIK.
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Photorefractive
Keratectomy can be used to treat low to
moderate myopia. In this procedure, topical anesthesia is instilled.
Then a lid speculum is placed in the eye to hold the lids open.
The corneal epithelial layer is removed. At this point the patient
fixates on a light and in less than 60 seconds, depending on the
refraction, the Excimer Laser reshapes the surface of the cornea.
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Laser
In-Situ Keratomileusis can be used to treat
all degrees of approved myopia, hyperopia and astigmatism. When performing
Lasik, topical anesthetic drops are again instilled and a lid speculum
is placed in the eye. However, with Lasik a microkeratome is used
to create a thin flap of cornea. The flap is folded back, and again
with the patient fixating on a light, the Excimer Laser reshapes the
corneal surface. The flap is replaced and carefully aligned back on
the cornea in its original position. |
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Custom
Lasik is now an available option. The VISX Star S4 Variable
Spot Scanning Laser with ActiveTrak® utilizes the most
advanced technology in vision correction surgery. In addition to
corneal topography and thickness, a wave scan analysis is performed
which will be used to individualize the laser treatment.
PRK
Vs LASIK
The
advantages of PRK are that a flap does not need to be created and
is therefore simpler. However, there is more discomfort with PRK until
the corneal epithelium heals. Many patients will experience some discomfort
or irritation. Also, with PRK the vision is blurry for several weeks
and may take several months to stabilize. Lasik requires the creation
of a corneal flap. However, the safety of recent generations of keratomes
has improved greatly. With Lasik there is usually minimal if any discomfort.
The vision improves within a few days and stabilizes within a few
weeks. Lasik has become the most commonly performed refractive procedure
in the United States. |
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Eligibility
The question of whether you are a candidate for Laser Vision Correction
depends on a combination of your refractive error and your expectations
of the procedure. Currently you must be 18 years old for nearsightedness
and older than 21 for astigmatism. You must also have a stable glass
prescription over the past year. You should not have any active eye
diseases, and some patients with severe dry eyes are not good candidates.
Certain medical conditions may also be contraindications, such as
rheumatoid arthritis and lupus, especially if they are in an active
phase.
In summary, it is important to have an evaluation with your ophthalmologist
to determine if you are an appropriate candidate. You should discuss
the realistic expectations with your doctor and be aware of the potential
side effects and risks. |
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Expectations
It
is important to have realistic expectations for the procedure. Not
all patients undergoing Lasik will have perfect vision. Many will
see 20/20 and a few will see even better than that after their initial
procedure. The vast majority (90%) of low to moderate myopic patients
will see well enough to legally drive. However, some may require
corrective lenses to sharpen their vision for certain activities.
Also, patients in their forties or older may have more difficulty
with their near vision, as Lasik only corrects for distance vision.
It does not reverse presbyopia nor eliminate the need for bifocals.
One option, however, is monovision in which one eye is corrected
for distance and the other is corrected for near. If this option
seems appealing to you, you should discuss this with your ophthalmologist.
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Risks
and Complications As
with any surgical procedure there are risks. Every individual patient
should weigh the potential benefits which Lasik can provide to the
likelihood of experiencing a complication. Patients may develop
corneal haze after the procedure. It is usually something the ophthalmologist
sees after surgery and may or may not affect the patient's vision.
Corneal haze usually resolves with time. However, some patients
may describe glare or haze especially at night. This is somewhat
related to the depth and size of the ablation, and may be more of
a factor in younger patients whose pupils dilate more.
Intra-operative
complications may also occur. These are usually related to the creation
of the corneal flap with the keratome. The flap may be too thin
or a completely free flap may be created. The occurrence of these
complications is decreasing, especially with the current generation
of keratomes that are used. The frequency of these complications
in recent studies was less than 2%. In these instances, the flap
is replaced to its natural position. It is allowed to heal for three
months and the procedure can again be performed. As with any surgical
procedure, there is a very small risk of a post-operative infection.
There may be other postoperative complications; however, a recent
study reported an overall postoperative complication rate of 2.6%.
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Risks
and Complications
Q How do I know if I am
a candidate for Retractive Surgery?
A: You
must have a complete eye exam by Doctor VanderLugt who will tell
you if you are a candidate based on your eye health and refractive
error.
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Q
Can I have both eyes operated on the same day?
A: With
PRK you must wait about a month between eyes. However, Lasik is
commonly performed on both eyes on the same day.
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Q
How long will the procedure take?
A: PRK
will take about 10-15 minutes for one eye. Lasik, which can be done
bilaterally, will take about 20-30 minutes for both eyes.
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Q
How soon after the procedure can I return to work?
A: It
depends on your occupation, but PRK patients may wish to wait 4-5
days. Many Lasik patients choose to return in 1-2 days.
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Q
How soon after the procedure can I wear makeup?
A: You
should wait a week before using eye makeup.
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Q
How long must I wait afterwards to play sports?
A:
It depends somewhat on the activity, but generally we recommend
about a week. We also strongly recommend wearing sports goggles
for certain sports.
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Q
Do insurance companies pay for this procedure?
A:
In the United States most insurance plans consider this an elective/cosmetic
surgery and do not cover the procedure. Some vision insurance plans
are working to add this as a benefit. In some cases you can use
your medical flex plan and pay for it with pretax money. You should
check with your insurance plan to see if your policy covers any
portion of the procedure.
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Free
Screenings Available
We do offer free screenings to evaluate whether
you are a candidate for laser vision correction based on your refractive
error and your expectations. Please call 269-383-1110 to schedule
a free screening. Also, please plan to bring your glasses or a copy
of your eyeglass prescription. |
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