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Browsing by Author "Yildirim, Aydin"

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    Article
    Long-Term Outcomes of Intrastromal Corneal Ring Segment Implantation for Post-Lasik Ectasia
    (Elsevier, 2014) Yildirim, Aydin; Cakir, Hanefi; Kara, Necip; Uslu, Hasim
    Purpose: To report the long-term results of intrastromal corneal ring segments (ICRS) for postoperative LASIK ectasia. Method: In this retrospective interventional cases series, 8 eyes of 6 patients who underwent femtosecond laser-assisted ICRS implantation for post-LASIK ectasia were enrolled. Main outcome measures were uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spherical equivalent refraction, and average keratometry (K-avg) values were assessed. Results: Mean +/- SD follow-up was 67 +/- 21 months (range, 36-96 months). The mean UDVA, CDVA, spherical equivalent refraction, and K-avg values were significantly improved at all postoperative visits when compared to baseline values. No serious complications were observed during follow-up. Conclusion: Our long-term findings showed that ICRS yielded improvements in visual acuity, refractive status, and keratometric values without any progression in cases with post-LASIK corneal ectasia. (C) 2014 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
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    Article
    Same-Day Intrastromal Corneal Ring Segment and Collagen Cross-Linking for Ectasia After Laser in Situ Keratomileusis: Long-Term Results
    (Elsevier Science inc, 2014) Yildirim, Aydin; Uslu, Hasim; Kara, Necip; Cakir, Hanefi; Curler, Bulent; Colak, Hatice Nur; Ozgurhan, Engin Bilge
    PURPOSE: To report the long-term results of combined same-day intrastromal corneal ring segment placement and corneal collagen cross-linking (CXL) for postoperative laser in situ keratomileusis (LASIK) ectasia. DESIGN: Retrospective, interventional case series. METHOD: This retrospective, interventional cases series was performed in Turkiye Hospital Eye Clinic and the Department of Ophthalmology, Fatih University Medical Faculty Hospital, Istanbul, Turkey. Sixteen eyes of 14 patients with postoperative ectasia after LASIK were enrolled. All consecutive patients were treated with femtosecond laser-assisted intrastromal corneal ring segment implantation and followed by same-day corneal collagen cross-linking for ectasia occurring after LASIK. Main outcome measures included uncorrected distance visual acuity, corrected distance visual acuity, spherical and cylindrical refraction, and simulated keratometry values. RESULTS: The mean age +/- standard deviation of the 10 women and 4 men was 33.0 +/- 6.5 years (range, 23 to 44 years), and the mean follow-up was 43 months (range, 36 to 62 months). The uncorrected distance visual acuity improved significantly from 1.18 +/- 0.42 logarithm of the minimal angle of resolution (logMAR) units to 0.44 +/- 0.22 logMAR (P < .001), and the corrected distance visual acuity improved significantly from 0.46 +/- 0.26 logMAR to 0.21 +/- 0.14 logMAR (P < .001). The mean spherical and cylindrical refraction decreased significantly (P < .001 for both). The maximum keratometry value decreased from baseline by 49.3 +/- 4.9 diopters (D) to 43.9 +/- 2.8 D at the last visit, and the minimum keratometry value decreased from 44.3 +/- 4.7 D to 41.5 +/- 3.5 D (P < .001 for both). No serious complications were shown during follow-up. CONCLUSIONS: Implantation of intrastromal corneal ring segment implantation combined with same-day corneal collagen cross-linking was a safe and effective treatment for ectasia occurring after LASIK. It also significantly improved the visual acuity, refraction, and keratometry values. (C) 2014 by Elsevier Inc. All rights reserved.