The assessment of the stability of the corneal structure after LASIK correction of myopia by different optical zone diameters
Background/Aim. Enlargement of optical zone (OZ) diameter during laser in situ keratomileusis (LASIK) correction of myopia postoperatively improves the optical outcome, however, it also leads to the increased stroma tissue consumption - progressive corneal thinning. The aim of this investig...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Ministry of Defence of the Republic of Serbia, University of Defence, Belgrade
2016-01-01
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| Series: | Vojnosanitetski Pregled |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0042-8450/2016/0042-84501500029M.pdf |
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| Summary: | Background/Aim. Enlargement of optical zone (OZ) diameter during laser in
situ keratomileusis (LASIK) correction of myopia postoperatively improves
the optical outcome, however, it also leads to the increased stroma tissue
consumption - progressive corneal thinning. The aim of this investigation
was to present the possibility of safe OZ enlargement without impairing the
structural stability of the cornea, while obtaining an improved optical
outcome with LASIK treatment of shortsightedness. Methods. Preoperative
assessment of the cornea structure and prediction of the ablated stroma
tissue consumption was conducted in 37 patients (74 eyes) treated for
shortsightedness by means of the LASIK method. With the eyes that, according
to their cornea structure, had the capacity for OZ diameter enlargement of
0.5 mm, LASIK treatment was performed within the wider OZ diameter of 7.0 mm
compared to the standard 6.5 mm. The following two groups were formed,
depending on the diameter of the utilized OZ: the group I (the eyes treated
with the OZ 6.5 mm, n = 37) and the group II (the eyes treated with the OZ
7.0 mm, n = 37). Results. No significant difference in the observed
structural parameters of the cornea was detected between the groups of
patients treated with different OZ diameters. The values of all the
parameters were significantly bellow the threshold values for the
development of postoperative ectasia. Conclusion. Diameter enlargement of
the treated OZ, if there is a preoperative cornea capacity for such
enlargement, will not impair the postoperative stability of the cornea
structure, and will significantly improve the optical outcome. |
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| ISSN: | 0042-8450 2406-0720 |