Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3235
Title: The effect of different optical zone diameters on the results of high-order aberrations in femto-laser-assisted in situ keratomileusis
Authors: Özülken, Kemal
 Kaderli, Ahmet
305548
Keywords: High-order aberrations
 laser in situ keratomileusis
optical zones
refractive surgery
Issue Date: 2019
Publisher: SAGE PUBLICATIONS LTD
Source: Özülken, K., & Kaderli, A. (2019). The effect of different optical zone diameters on the results of high-order aberrations in femto-laser-assisted in situ keratomileusis. European journal of ophthalmology, 1120672119865688.
Abstract: Purpose: To evaluate the postoperative high-order aberration differences of femto-LASIK surgery in 6.5 and 7?mm optic zones. Patients and Methods: We retrospectively reviewed 80 eyes of 40 patients with myopia or myopia with astigmatism who underwent femtosecond LASIK surgery. Q values, z3, 3 (h. trefoil), z3, –3 (v. trefoil), z3, 1 (h. coma), z3, –1 (vertical coma), z4, 0 (spherical aberration), z5, –1 (second other v. coma), aberration coefficients were evaluated 3?months after surgery. Central corneal thicknesses, intraocular pressures, patient ages and genders, optical zone diameters and ablation depths are collected from patients’ medical records. Results: The mean age was 28.4?±?0.69?years (range, 20–47?years). Lower z4, 0 spherical aberrations and aberration coefficient values were associated with larger optical zones (7?mm) (z4, 0 spherical aberrations?=?1.25, p?=?0.01; coefficient value?=?–1.21, p?<?0.01). Although a smaller optical zone (6.5?mm) was associated with an increase in most of the wave-front aberration variables, measurements were not statistically different between the two groups other than z4, 0 spherical aberrations and aberration coefficients. Discussion: LASIK treatment with 6.5 and 7?mm optical zones is safe and effective for correcting myopia and myopic astigmatism and has statistically similar visual outcomes. Moreover, larger optical zone (7?mm) was found to be associated with lower spherical aberration induction and smaller aberration coefficient values compared to 6.5?mm optical zone. This can be important for decision-making in femto-LASIK surgery for better postoperative results.
URI: https://hdl.handle.net/20.500.11851/3235
https://journals.sagepub.com/doi/pdf/10.1177/1120672119865688
ISSN: 1120-6721
Appears in Collections:Cerrahi Tıp Bilimleri Bölümü / Department of Surgical Sciences
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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