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dc.contributor.authorSedaghat, Mohammad-Reza
dc.contributor.authorMomeni-Moghaddam, Hamed
dc.contributor.authorBelin, Michael W
dc.contributor.authorZarei-Ghanavati, Siamak
dc.contributor.authorAkbarzadeh, Reyhaneh
dc.contributor.authorSabzi, Fatemeh
dc.contributor.authorYekta, Abbas-Ali
dc.contributor.authorSadeghi Allahabadi, Javad
dc.date.accessioned2019-03-12T17:44:22Z
dc.date.available2019-03-12T17:44:22Z
dc.date.issued2018-11-01
dc.identifier.citationSedaghat, M. R., Momeni-Moghaddam, H., Belin, M. W., Zarei-Ghanavati, S., Akbarzadeh, R., Sabzi, F., ... & Allahabadi, J. S. (2018). Changes in the ABCD Keratoconus Grade After Intracorneal Ring Segment Implantation. Cornea, 37(11), 1431-1437.en_US
dc.identifier.issn1536-4798
dc.identifier.pmid29863546
dc.identifier.doi10.1097/ICO.0000000000001648
dc.identifier.urihttp://hdl.handle.net/10150/631836
dc.description.abstractTo assess the changes in the ABCD keratoconus staging system 6 months after intracorneal ring segment implantation. Fifty eyes of 50 patients with keratoconus who were implanted with the Keraring (Mediphacos, Belo Horizonte, Brazil) using the femtosecond laser were assessed. Preoperative and postoperative assessments included determination of distance uncorrected visual acuity and distance corrected visual acuity (DCVA), refraction, and Scheimpflug tomography with the Pentacam HR. In the ABCD keratoconus staging system, the elements A, B, C, and D stand for anterior and posterior radii of curvature in a 3.0-mm zone centered on the thinnest point (TP), corneal thickness at the TP, and DCVA, respectively. Keraring implantation produced significant flattening changes (preoperatively vs. postoperatively) in the anterior (6.60 ± 0.48 vs. 7.22 ± 0.57 mm, P < 0.001) and posterior (4.99 ± 0.47 vs. 5.16 ± 0.53 mm, P = 0.002) radii of curvature of the 3-mm zone centered on the corneal TP associated with a statistically significant improvement in the DCVA (0.56 ± 0.24 vs. 0.70 ± 0.22 in the decimal notation, P = 0.001) with no significant change in the corneal thickness at the TP (P = 0.285). The most changes occurred in element A of the ABCD keratoconus classification. Also, a 1-stage change was observed for element B, whereas elements C and D did not show changes in their postoperative stages after ring implantation. ABCD keratoconus staging before ring implantation was A2B3C2D1 and changed to A1B2C2D1 6 months after surgery. The ABCD staging system provides a more comprehensive guide that better illustrates the structural changes and visual acuity as one aspect of visual function after the implantation of the intrastromal corneal ring segments.en_US
dc.language.isoenen_US
dc.publisherLIPPINCOTT WILLIAMS & WILKINSen_US
dc.rightsCopyright © 2018 Wolters Kluwer Health, Inc. Unauthorized reproduction of this article is prohibited.en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectkeratoconusen_US
dc.subjectstagingen_US
dc.subjectintracorneal ring segmentsen_US
dc.subjectKeraringen_US
dc.subjectcorneal tomographyen_US
dc.titleChanges in the ABCD Keratoconus Grade After Intracorneal Ring Segment Implantationen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Dept Ophthalmol & Vis Scien_US
dc.identifier.journalCORNEAen_US
dc.description.note12 month embargo; published online ahead of print May 31, 2018.en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal accepted manuscripten_US
dc.source.journaltitleCornea


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