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LASIK Up-to-date Newsletter
How good are my chances of attaining perfect vision after
LASIK?
Everybody asks this question, that is, everyone who is interested in
LASIK. However, it is not possible to answer this with absolute certainty
in advance. The post-operative result, and particularly the satisfaction
of the patients depend on several factors.
Visual acuity
Scientific studies generally publish results by giving data of the post-operative
visual acuity without correction, and then also with the best correction.
Besides that, testing is done in increments in order to examine the
stability of the result (immediately after surgery, up to one year after
the operation).
Since the Excimer Laser has been approved, almost all studies unanimously
show good results when the PRK and LASIK are used for mild to average
myopia (up to maximum of –10 diopter. Thus the following applies:
the lower the myopia, the more dependable is the result). If an astigmatism
is present, this can also be treated. The strength then influences the
total result.
Side effects / Symptoms
It is much more important to talk about undesired side effects
which can put a damper on the newly acquired visual acuity of 100%.
This includes the presence of halos, double vision, as well as increased
sensitivity to glare, which can lead to problems with driving at night.
Halos show up more when the pupil of the patient opens beyond the treatment
zone in the dark (quite often with myopia above –5 diopters and
hyperopia).
The decision – to have LASIK or not to have LASIK – cannot
solely be based on the severity of the visual impairment. The preliminary
examination by the ophthalmologist should also include various special
examinations such as:
• cornea topography (mapping of the cornea surface condition)
• determination of the cornea thickness via ultra sound
• measuring the pupil diameter at dusk and in the dark
With these test results on hand, an experienced surgeon can accurately
answer your questions.
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