{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T23:47:31Z","timestamp":1780098451465,"version":"3.54.0"},"reference-count":23,"publisher":"Wiley","license":[{"start":{"date-parts":[[2016,1,1]],"date-time":"2016-01-01T00:00:00Z","timestamp":1451606400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Catholic Medical Center Research Foundation"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Ophthalmology"],"published-print":{"date-parts":[[2016]]},"abstract":"<jats:p><jats:italic>Purpose.<\/jats:italic>To evaluate surgically induced astigmatism (SIA) and the average corneal power change in symmetric intrastromal corneal ring segment (ICRS) implantation.<jats:italic>Methods.<\/jats:italic>The study included 34 eyes of 34 keratoconus patients who underwent symmetric Intacs SK ICRS implantation. The corneal pocket incision meridian was the preoperative steep meridian. Corneal power data were obtained before and 3 months after Intacs SK ICRS implantation using scanning-slit topography. Polar value analysis was used to evaluate the SIA. Hotelling\u2019s trace test was used to compare intraindividual changes.<jats:italic>Results.<\/jats:italic>Three months postoperatively, the combined mean polar value for SIA changed significantly (Hotelling\u2019s<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:msup><mml:mrow><mml:mi>T<\/mml:mi><\/mml:mrow><mml:mrow><mml:mn fontstyle=\"italic\">2<\/mml:mn><\/mml:mrow><\/mml:msup><mml:mo>=<\/mml:mo><mml:mn fontstyle=\"italic\">0.375<\/mml:mn><\/mml:math>;<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mi>P<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn fontstyle=\"italic\">0.006<\/mml:mn><\/mml:math>). The SIA was 1.54\u2009D at 99\u00b0 and the average corneal power decreased significantly by 3.8\u2009D.<jats:italic>Conclusion.<\/jats:italic>Intacs SK ICRS placement decreased the average corneal power and corneal astigmatism compared to the preoperative corneal power and astigmatism when the corneal pocket incision was made at the preoperative steep meridian.<\/jats:p>","DOI":"10.1155\/2016\/7127534","type":"journal-article","created":{"date-parts":[[2016,10,3]],"date-time":"2016-10-03T17:44:31Z","timestamp":1475516671000},"page":"1-6","source":"Crossref","is-referenced-by-count":2,"title":["Polar Value Analysis of Corneal Astigmatism in Intrastromal Corneal Ring Segment Implantation"],"prefix":"10.1155","volume":"2016","author":[{"given":"Chang Rae","family":"Rho","sequence":"first","affiliation":[{"name":"Department of Ophthalmology and Visual Science, Daejeon St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min-Ji","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0535-4118","authenticated-orcid":true,"given":"Choun-Ki","family":"Joo","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology and Visual Science, Seoul St. Mary\u2019s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1016\/s0886-3350(00)00575-7"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1016\/s0886-3350(00)00451-x"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1016\/s0161-6420(01)00646-7"},{"key":"4","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajo.2006.10.041"},{"key":"5","doi-asserted-by":"publisher","DOI":"10.1111\/j.1442-9071.2010.02197.x"},{"key":"6","first-page":"5","volume":"86","year":"2008","journal-title":"Acta Ophthalmologica"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2012.04.024"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2011.04.025"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1016\/s0886-3350(00)00799-9"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.1016\/s0886-3350(00)00816-6"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1016\/S0275-5408(98)00037-4"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2006.08.032"},{"issue":"7","key":"13","doi-asserted-by":"crossref","first-page":"690","DOI":"10.3928\/1081597X-20080901-08","volume":"24","year":"2008","journal-title":"Journal of Refractive Surgery"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2006.02.044"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1167\/iovs.09-5017"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2011.11.031"},{"key":"17","doi-asserted-by":"publisher","DOI":"10.1097\/00003226-199101000-00002"},{"key":"18","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9394(02)01824-X"},{"key":"19","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2008.05.028"},{"key":"20","doi-asserted-by":"publisher","DOI":"10.1097\/ico.0b013e318172fc54"},{"key":"21","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2012.02.039"},{"key":"22","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2011.07.031"},{"key":"23","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2009.07.040"}],"container-title":["Journal of Ophthalmology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/joph\/2016\/7127534.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/joph\/2016\/7127534.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/joph\/2016\/7127534.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,9,14]],"date-time":"2019-09-14T02:50:22Z","timestamp":1568429422000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/joph\/2016\/7127534\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2016]]},"references-count":23,"alternative-id":["7127534","7127534"],"URL":"https:\/\/doi.org\/10.1155\/2016\/7127534","relation":{},"ISSN":["2090-004X","2090-0058"],"issn-type":[{"value":"2090-004X","type":"print"},{"value":"2090-0058","type":"electronic"}],"subject":[],"published":{"date-parts":[[2016]]}}}