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Visual, refractive and topographic outcomes of progressive thickness intrastromal corneal ring segments for keratoconic eyes.

Abstract：

PURPOSE:To evaluate one-year visual, refractive, and topographic outcomes of 58 eyes of 53 keratoconus patients who underwent surgery with a progressive thickness intrastromal corneal ring segment (ICRS). METHODS:This multi-center, retrospective, observational study evaluates the one-year effects of progressive thickness ICRS implanted in keratoconus patients meeting the inclusion criteria. One or two progressive ICRS were implanted in the selected eyes after creating an intrastromal tunnel with a femtosecond laser. Pre- and postoperative uncorrected distance visual acuity, best-corrected distance visual acuity, manifest refraction (both spherical equivalent and cylindrical refractions), corneal astigmatism, maximum keratometry, corneal thickness, and corneal topography measurements and indices were evaluated. RESULTS:In this retrospective case series, 58 eyes of 53 keratoconus patients were included with a follow-up of 12 months. The mean age was 30.89 ± 11.90 years. There were improvements postoperatively in mean values of visual acuities, both uncorrected from 0.71 (preoperatively) to 0.28 (log MAR), and best-corrected from 0.28 to 0.10 (log MAR), mean cylindrical refraction from - 2.35 ± 1.51 to - 4.15 ± 2.23 D, and mean spherical equivalent from - 2.10 ± 2.25 to - 4.64 ± 3.2 D. There was also a reduction in maximal keratometry from 54.21 D preoperatively to 50.93 D postoperatively. CONCLUSION:The implantation of the progressive thickness ICRS is an effective and safe method to improve the vision of keratoconic eyes. Corneal stability was maintained at the 12-month mark.

journal_name

Int Ophthalmol

journal_title

International ophthalmology

authors

Coşkunseven E,Ambrósio R Jr,Smorádková A,Sánchez León F,Sahin O,Kavadarli I,Jankov MR 2nd

doi

10.1007/s10792-020-01467-5

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

2835-2844

issue

11

eissn

0165-5701

issn

1573-2630

pii

10.1007/s10792-020-01467-5

journal_volume

40

pub_type

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