الفهرس 
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Abstract
SUMMARY
aser in situ keratomileusis (LASIK) is currently the most
popular refractive procedure. Most cases are eventless and
provide excellent refractive results. Nevertheless, anecdotal
reports have been published showing that LASIK’s transient
elevation of intraocular pressure (IOP) during suction ring
application can have potential deleterious effects on posterior
segment in myopic eyes, and only careful and large prospective
studies can determine whether the procedure exacerbates
myopic abnormalities. A dilated fundus examination is very
important before LASIK and in every patient whose VA after
LASIK is not as good as expected to avoid delayed referral to a
vitreoretinal specialist if necessary.
The aim of this work is to assess the influence of
transient elevation in intraocular pressure (IOP) during suction
in laser assisted in situ Keratomileusis (LASIK) on viteroretinal
changes assessed by optical coherence tomography (OCT).
Optical coherence tomography (OCT) is a rapid
noncontact method that allows in vivo imaging of the retina,
optic nerve head and retinal nerve fibre layer (RNFL). Since its
introduction in Ophthalmology approximately a decade ago, the
use of this technology has disseminated into the clinical
practice. OCT has proven to be a useful ancillary tool for
assessing retinal diseases because of its capability to provide
crosssectional images of the retina, and also to perform
quantitative analysis of retinal morphology. In glaucoma, the
L
Summary
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OCT represents one of the methods capable of documenting
and analysing optic disc and RNFL morphology in attempt to
diagnose and monitor glaucomatous optic neuropathy.
The study was conducted on 30 eyes of 15 patients with
moderate myopia was assessed one week before and one week
after LASIK using optical coherence tomography.
In this study, it was found that LASIK does not affect the
retinal nerve fiber layer thickness except nasal RNFL reduced,
foveal thickness and nasal inner macula also reduced one week
postoperative measured by optical coherence tomography, we
cannot explain our finding, no PVD was detected.
Further studies with larger number of cases and longer
follow-up periods are needed to evaluate the long term effects
of LASIK on posterior segment.
So the surgery of Laser in situ keratomileusis is a safe
and effective method for the correction of refractive errors