{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,25]],"date-time":"2026-02-25T21:21:48Z","timestamp":1772054508199,"version":"3.50.1"},"reference-count":22,"publisher":"SLACK, Inc.","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Refract Surg"],"published-print":{"date-parts":[[2017,2]]},"abstract":"<jats:sec>\n            <jats:title>PURPOSE:<\/jats:title>\n            <jats:p>To analyze and compare changes to the anterior and posterior corneal surfaces after Ferrara intracorneal ring segment (ICRS) (AJL, Boecillo, Spain) implantation and to correlate those changes with visual outcomes.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>METHODS:<\/jats:title>\n            <jats:p>This retrospective case series study comprised consecutive patients with keratoconus implanted with the Ferrara ICRS. Computed tomography scans of the two corneal surfaces were obtained preoperatively and postoperatively with a rotating Scheimpflug imaging system. The Wilcoxon test was used to compare groups, and the Pearson's correlation coefficient was used to measure the strength of the correlation between variables.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>RESULTS:<\/jats:title>\n            <jats:p>The study evaluated 241 eyes in 182 patients with keratoconus. Both corneal surfaces showed statistically significant decreases in average steep keratometry (K2) values, corneal astigmatism, elevation at the apex and at the thinnest point, maximum elevation in the central 4-mm area, and elevation inside the 3- and 4-mm zones and at the 3-mm ring. Regarding anterior surface parameters, a significant decrease was observed in flat keratometry (K1), whereas asphericity increased. On the posterior corneal surface, no significant changes in K1 and asphericity were observed. Poor correlation was found between visual outcomes and changes in tomographic parameters. The best correlation was obtained for anterior corneal astigmatism.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>CONCLUSIONS:<\/jats:title>\n            <jats:p>ICRS implantation led to statistically significant changes in both anterior and posterior corneal surfaces. However, correlation between visual outcomes and tomographic parameters was poor.<\/jats:p>\n            <jats:p>\n              <jats:bold>\n                [\n                <jats:italic>J Refract Surg.<\/jats:italic>\n                2017;33(2):110\u2013115.]\n              <\/jats:bold>\n            <\/jats:p>\n          <\/jats:sec>","DOI":"10.3928\/1081597x-20161027-02","type":"journal-article","created":{"date-parts":[[2017,2,13]],"date-time":"2017-02-13T18:11:46Z","timestamp":1487009506000},"page":"110-115","source":"Crossref","is-referenced-by-count":22,"title":["Tomographic Findings After Implantation of Ferrara Intrastromal Corneal Ring Segments in Keratoconus"],"prefix":"10.3928","volume":"33","author":[{"given":"Jo\u00e3o Marcelo","family":"Lyra","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniela","family":"Lyra","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guilherme","family":"Ribeiro","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leonardo","family":"Torquetti","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paulo","family":"Ferrara","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aydano","family":"Machado","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2308","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.3109\/02713683.2013.788723"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1097\/ICO.0b013e31822481df"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0886-3350(02)01495-5"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2003.12.005"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2009.04.035"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2009.05.036"},{"key":"e_1_3_2_8_2","first-page":"1283","article-title":"Evaluation of anterior and posterior surfaces of the cornea using a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments","volume":"9","author":"Torquetti L","year":"2016","unstructured":"Torquetti L, Arce C, Merayo-Looves J, et al. Evaluation of anterior and posterior surfaces of the cornea using a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments. Int J Ophthalmol. 2016;9:1283\u20131288.","journal-title":"Int J Ophthalmol"},{"key":"e_1_3_2_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0886-3350(02)02038-2"},{"key":"e_1_3_2_10_2","doi-asserted-by":"publisher","DOI":"10.3928\/1081-597X-20020101-06"},{"key":"e_1_3_2_11_2","doi-asserted-by":"publisher","DOI":"10.1590\/S0004-27492000000300008"},{"key":"e_1_3_2_12_2","doi-asserted-by":"publisher","DOI":"10.3928\/1081-597X-19960101-08"},{"key":"e_1_3_2_13_2","first-page":"417","article-title":"Study of the ocular changes after stromal Ferrara ring implantation in patients with keratoconus","volume":"66","author":"Ferrara P","year":"2003","unstructured":"Ferrara P, Alves EAF, Silva FBD, Cunha GHA. Study of the ocular changes after stromal Ferrara ring implantation in patients with keratoconus. Arq Bras Oftalmol. 2003;66:417\u2013422.","journal-title":"Arq Bras Oftalmol"},{"key":"e_1_3_2_14_2","doi-asserted-by":"publisher","DOI":"10.5005\/jp-journals-10025-1003"},{"key":"e_1_3_2_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0161-6420(00)00159-7"},{"key":"e_1_3_2_16_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ophtha.2009.05.016"},{"key":"e_1_3_2_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2006.11.008"},{"key":"e_1_3_2_18_2","first-page":"385","article-title":"Corneal asphericity in a young adult population: clinical implications [article in Spanish]","volume":"79","author":"Yebra-Pimentel E","year":"2004","unstructured":"Yebra-Pimentel E, Gonz\u00e1lez-M\u00e9ijome JM, Cervino A, Gir\u00e1ldez MJ, Gonz\u00e1lez-P\u00e9rez J, Parafita MA. Corneal asphericity in a young adult population: clinical implications [article in Spanish]. Arch Soc Esp Oftalmol. 2004;79:385\u2013392.","journal-title":"Arch Soc Esp Oftalmol"},{"key":"e_1_3_2_19_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2009.11.012"},{"key":"e_1_3_2_20_2","first-page":"178","article-title":"Corneal asphericity changes after implantation of intrastromal corneal ring segments in keratoconus","volume":"1","author":"Torquetti L","year":"2010","unstructured":"Torquetti L, Ferrara P. Corneal asphericity changes after implantation of intrastromal corneal ring segments in keratoconus. J Emmetropia. 2010;1:178\u2013181.","journal-title":"J Emmetropia"},{"key":"e_1_3_2_21_2","doi-asserted-by":"publisher","DOI":"10.5005\/jp-journals-10025-1005"},{"key":"e_1_3_2_22_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2006.02.012"},{"key":"e_1_3_2_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0886-3350(00)00451-X"}],"container-title":["Journal of Refractive Surgery"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.healio.com\/ophthalmology\/journals\/jrs\/2017-2-33-2\/%7Bc725d82d-f64c-4895-b189-f9be132e16e6%7D\/tomographic-findings-after-implantation-of-ferrara-intrastromal-corneal-ring-segments-in-keratoconus","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,5,3]],"date-time":"2023-05-03T07:23:19Z","timestamp":1683098599000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.healio.com\/doi\/10.3928\/1081597X-20161027-02"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,2]]},"references-count":22,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2017,2]]}},"alternative-id":["10.3928\/1081597X-20161027-02"],"URL":"https:\/\/doi.org\/10.3928\/1081597x-20161027-02","relation":{},"ISSN":["1081-597X"],"issn-type":[{"value":"1081-597X","type":"print"}],"subject":[],"published":{"date-parts":[[2017,2]]}}}