A Single 210-Degree Arc Length Intrastromal Corneal Ring Implantation for the Management of Pellucid Marginal Corneal Degeneration - 19/08/11
, Yasin Cinar a, Arif Koytak a, Ekrem Kurnaz a, David P. Piñero b, Yusuf Ozerturk a
Inquiries to Esin Sogutlu Sari, Altıyol Kırtasiye Sok. No: 36, Merkez/Kadiköy, Istanbul, TurkeyRésumé |
Purpose |
To determine the visual and refractive outcomes of 210-degree arc length intrastromal corneal ring segment (ICRS) implantation in eyes with pellucid marginal corneal degeneration (PMCD).
Design |
Retrospective, consecutive case series.
Methods |
Sixteen consecutive eyes of 10 patients who underwent a single 210-degree ICRS implantation by femtosecond laser for the management of PMCD and completed at least 1 year follow-up were included. A complete ophthalmic examination was performed preoperatively and postoperatively, including uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest spherical and cylindrical refractions, spherical equivalent, and keratometric readings.
Results |
The mean follow-up period was 30.7 months (range 12 to 36 months). No intraoperative complication was observed. White deposits around the segments were noted in 2 of 16 eyes (12.5%) at the first postoperative year. The mean UCVA showed significant improvement, from 1.69 ± 1.02 logarithm of the minimal angle of resolution (logMAR) preoperatively to 0.64 ± 0.43 logMAR at the 36th month (n = 11, P < .001). The mean preoperative BSCVA was 0.88 ± 0.68 logMAR; after 36 months, this improved to 0.35 ± 0.34 (P < .001). At the 36th month, UCVA was improved in all eyes (n = 11, range: gain of 1 to 6 lines), whereas BSCVA was improved in 9 eyes (81.8%, range: gain of 2 to 7 lines) and remained unchanged in 2 eyes (18.1%); UCVA was 20/40 or better in 3 eyes (27%) and BSCVA was 20/40 or better in 8 eyes (72.7%). There was a significant reduction in the spherical equivalent refractive error, from −4.40 ± 1.85 diopters (D) preoperatively to −1.86 ± 0.60 D (P < .001), and the mean maximum keratometric power decreased from 49.70 ± 4.32 D to 46.08 ± 2.84 D (P < .001) after 36 months. The mean cylindrical refraction decreased from −4.39 ± 1.86 D preoperatively to −2.38 ± 1.35 D at 36 months (P < .001).
Conclusion |
A single 210-degree arc length ICRS implantation using a femtosecond laser for patients with PMCD provides good visual and refractive outcomes.
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Vol 150 - N° 2
P. 185 - août 2010 Retour au numéro
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