Laser in situ keratomileusis (LASİK) in patients with superior steepening on corneal topography: Is it safe and predictable?
International Ophthalmology, cilt.40, sa.9, ss.2353-2359, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 9
- Basım Tarihi: 2020
- Doi Numarası: 10.1007/s10792-020-01420-6
- Dergi Adı: International Ophthalmology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, BIOSIS, EMBASE, MEDLINE
- Sayfa Sayıları: ss.2353-2359
- Anahtar Kelimeler: LASIK, Superior steepening, Topography, Ectasia
- Sağlık Bilimleri Üniversitesi Adresli: Evet
Özet
Background: Attention is usually given to inferior steepening on corneal topography in the evaluation of a patient’s suitability for LASIK surgery. The aim of this study is to investigate long-term refractive results with superior steepening. Methods: Patients who underwent LASIK surgery between 2015 and 2019 in our refractive surgery department were retrospectively reviewed. The patients with a ≥ 1.0 D superior–inferior (S–I) quadrant difference in the tangential map, using a Scheimpflug camera with a Placido disc topographer (Sirius), were included in the study. Preoperative and postoperative best-corrected and uncorrected visual acuity (Snellen), cylindrical refraction values, and spherical equivalent (SE) values were compared. Adverse events were recorded. Results: Fifty eyes of 28 patients participated in the study. The mean age of the patients was 27.5 ± 8.0 (19–59). Sixteen patients were female (57.1%), and 12 (42.8%) patients were male. The average follow-up time was 29.8 ± 11.1 months (12–61). Average central corneal thickness was 549.4 ± 26.0 (498–602) μm. Average minimal corneal thickness was 549.1 ± 26.9 (497–598) μm. Preoperative S–I quadrant difference (D) was 1.87 ± 0.7 (1.0–3.99). Posterior elevation (Kvb) was 11.2 ± 1.9 (9–17) μm. The preoperative SE value was − 1.7 ± 2.1 (− 6.25–3.25) and improved to − 0.3 ± 0.44 D (− 1.25–0.75) (p < 0.001). Preoperative cylindrical refraction values were − 2.04 ± 1.7 (− 6.25–0), and postoperative values were − 0.47 ± 0.4 (− 2–0) D (p < 0.001). Uncorrected visual acuity was median 1.0 (0.4–1.0) with 38 eyes (76%) having 20/20 postoperative uncorrected visual acuity. No sight threatening complications or ectasia findings were observed during the 2 years postoperative follow-up time. Conclusions: Abnormal corneal topographies with (S–I) asymmetry result in predictable results after LASIK.