Risks and complications
As with any medical procedure, there is always some risk involved.
The chances of your vision being worse after the surgery than it was
before are very low. For example, the risk of complication with the LASIK
procedure is less than 1%. We will assess your individual risk during
the preoperative examination and consultation.
Generally, our patients are more than happy with their treatment: They
are finally freed from dependency on corrective lenses in everyday life.
However, we feel that it is our obligation to inform each individual patient,
prior to surgery, about possible complications.
One of the most important factors in a successful treatment is the strict
observation of all instructions given by our physicians, including the
conscientious use of all prescribed medication. After your surgery you
will receive our “ALZ post-op kit” which contains eye drops,
protective sunglasses, your doctor’s phone number and more. See
What to Expect After Surgery
Immediately after surgery, corneal sensitivity will be reduced. This
may lead to a decrease in tear production (dry eye). This is commonly
experienced as an increased foreign body sensation – the feeling
that you have something in your eye. The artificial teardrops in your
post-op kit will provide relief. On the day of surgery, you may experience
an increased redness of the eye or an increased secretion of tears. This
is quite normal and no cause for worry.
Severe pain or sudden decrease in vision should not occur.
If you experience these symptoms, please contact our medical hotline immediately
and you will receive strict instructions from a physician.
The following complications may occure in less than 1% of LASIK patients:
Flap complications
Over- or undercorrection
Decentralized optical zone
Epithelial ingrowth
Infection
Halos and Glare
Re-LASIK
Extremely rare complications
Flap complications
To ensure optimal treatment, we follow international guidelines that have
been established for the LASIK procedure. They concern the thickness of
the corneal flap (160 to 180 micrometer), the thickness of the remaining
corneal tissue in the stromal bed (250 micrometer) and the size of the
treatment area (6.0 to 6.5 millimeter).
In step one of LASIK surgery a small
incision is made to create the corneal flap. In the unlikely event that
the incision is irregular or incomplete, we will terminate the surgery,
and the procedure can be repeated after 6 months. If, however, the tissue
for the corneal flap is separated completely, laser ablation (step-two)
can still take place. The area where the flap is made will have been marked
prior to surgery and can therefore be placed back into its exact position
without difficulty. You will then receive a therapeutic contact lens to
prevent the flap from moving.
Over- or undercorrection
In some cases, an overcorrection or undercorrection amounting to approximately
10% - 20% of the desired result is possible. This is usually the result
of individual variations in tissue property or in the healing process.
In most cases, an enhancement procedure (follow-up surgery) can then be
performed approximately 6 months after the initial surgery.
Decentralized optical zone
In rare cases, the treatment zone may become decentralized, which would
also necessitate an enhancement procedure (follow-up surgery).
Epithelial ingrowth
During the initial recovery period, it is possible that cells of the epithelium
(the outer layer of the cornea) could migrate between the corneal flap
and the stromal bed, where they may start growing. In order to avoid any
adverse effect on your vision, the flap will then be lifted, so that these
cells can be removed.
Infection
In order to avoid an eye infection, you will receive antibiotic eye drops
during and after the surgery. In case you experience any severe pain,
or if an eye infection develops even in spite of all precautionary measures,
please contact our medical hotline immediately and observe all instructions
given by the physician. (You will receive the telephone number for the
hotline with your post-op kit.)
Halos and Glare
After surgery, some patients have reported seeing a “halo”
or glare around light sources. These effects are subject to the individual
healing process and will disappear after a few weeks.
Re-LASIK
The chances of needing an enhancement procedure (follow-up surgery) to
obtain the desired correction result is very low - the risk of the patient's
vision being worse after surgery than it was before is statistically less
than 1%.
The risk of becoming blind
after surgery is extremely low but, as with any medical procedure, we
cannot provide a 100% guarantee. You can be assured that we will do everything
we can to protect your health and safety. You can talk to any of our staff
member about your concerns. Your surgeon will counsel you on all possible
risks.
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