Summary:
Purpose: The purpose of this study is to outline the importance of corneal
topography after LASIKsurgery andto show the association between topographic
findings and postoperative results.
Patients: One hundred and fourteen eyes, 70 patients with myopia (from -6.00 to
-14.00 Dsph) who underwent surgery by LASIK.
Methods: We identified 5 types of topographic patterns which were classified to
symmetric and asymmetric groups.We evaluated the association between the type
of topography pattern and the following parameters: age, sex, astigmatism, preoperative
refraction, post-operative uncorrected and best corrected visual acuity.
Results: Fifty eight eyes filled the criteria of the first group (uniform pattern), 30
eyes of the second group (bowtie), 4 eyes of the third group (penninsula), 3 eyes
of the fourth group (semicircular) and 3 eyes of the fifth group (irregular pattern).
Significant association between topographic corneal patterns and observed parameters
has been confirmed in post-operative uncorrected visual acuity, postoperative
refraction and astigmatism (p<0.05). Age and sex were not significant
parameters for the outcome of surgery.
Conclusion: Majority of eyes (89 %) had symmetric corneal topography pattern
which highly surpassed our expectations. Comparison of topography patterns
with observed parameters proves that the shape of ablation zone influences
post-operative quality of vision.
Key words:
LASIK, corneal topography, myopia, excimer laser
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