Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism
Purpose. To assess the amount and the axis orientation of anterior and posterior corneal astigmatism after refractive lenticule extraction (ReLEx) for myopic astigmatism. Methods. We retrospectively examined 53 eyes of 53 consecutive patients (mean age ± standard deviation, 33.2 ± 6.5 years) undergo...
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| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Ophthalmology |
| Online Access: | http://dx.doi.org/10.1155/2015/915853 |
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| author | Kazutaka Kamiya Kimiya Shimizu Mayumi Yamagishi Akihito Igarashi Hidenaga Kobashi |
| author_facet | Kazutaka Kamiya Kimiya Shimizu Mayumi Yamagishi Akihito Igarashi Hidenaga Kobashi |
| author_sort | Kazutaka Kamiya |
| collection | DOAJ |
| description | Purpose. To assess the amount and the axis orientation of anterior and posterior corneal astigmatism after refractive lenticule extraction (ReLEx) for myopic astigmatism. Methods. We retrospectively examined 53 eyes of 53 consecutive patients (mean age ± standard deviation, 33.2 ± 6.5 years) undergoing ReLEx to correct myopic astigmatism (manifest cylinder = 0.5 diopters (D)). Power vector analysis was performed with anterior and posterior corneal astigmatism measured with a rotating Scheimpflug system (Pentacam HR, Oculus) and refractive astigmatism preoperatively and 3 months postoperatively. Results. Anterior corneal astigmatism was significantly decreased, measuring 1.42 ± 0.73 diopters (D) preoperatively and 1.11 ± 0.53 D postoperatively (p<0.001, Wilcoxon signed-rank test). Posterior corneal astigmatism showed no significant change, falling from 0.44 ± 0.12 D preoperatively to 0.42 ± 0.13 D postoperatively (p=0.18). Refractive astigmatism decreased significantly, from 0.92 ± 0.51 D preoperatively to 0.27 ± 0.44 D postoperatively (p<0.001). The anterior surface showed with-the-rule astigmatism in 51 eyes (96%) preoperatively and 48 eyes (91%) postoperatively. By contrast, the posterior surface showed against-the-rule astigmatism in all eyes preoperatively and postoperatively. Conclusions. The surgical effects were largely attributed to the astigmatic correction of the anterior corneal surface. Posterior corneal astigmatism remained unchanged even after ReLEx for myopic astigmatism. |
| format | Article |
| id | doaj-art-9f903e0d5e4b4044a3e2e858d9c32af3 |
| institution | Kabale University |
| issn | 2090-004X 2090-0058 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Ophthalmology |
| spelling | doaj-art-9f903e0d5e4b4044a3e2e858d9c32af32025-02-03T05:53:31ZengWileyJournal of Ophthalmology2090-004X2090-00582015-01-01201510.1155/2015/915853915853Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic AstigmatismKazutaka Kamiya0Kimiya Shimizu1Mayumi Yamagishi2Akihito Igarashi3Hidenaga Kobashi4Department of Ophthalmology, University of Kitasato School of Medicine, Kanagawa 2520374, JapanDepartment of Ophthalmology, University of Kitasato School of Medicine, Kanagawa 2520374, JapanDepartment of Ophthalmology, University of Kitasato School of Medicine, Kanagawa 2520374, JapanDepartment of Ophthalmology, University of Kitasato School of Medicine, Kanagawa 2520374, JapanDepartment of Ophthalmology, University of Kitasato School of Medicine, Kanagawa 2520374, JapanPurpose. To assess the amount and the axis orientation of anterior and posterior corneal astigmatism after refractive lenticule extraction (ReLEx) for myopic astigmatism. Methods. We retrospectively examined 53 eyes of 53 consecutive patients (mean age ± standard deviation, 33.2 ± 6.5 years) undergoing ReLEx to correct myopic astigmatism (manifest cylinder = 0.5 diopters (D)). Power vector analysis was performed with anterior and posterior corneal astigmatism measured with a rotating Scheimpflug system (Pentacam HR, Oculus) and refractive astigmatism preoperatively and 3 months postoperatively. Results. Anterior corneal astigmatism was significantly decreased, measuring 1.42 ± 0.73 diopters (D) preoperatively and 1.11 ± 0.53 D postoperatively (p<0.001, Wilcoxon signed-rank test). Posterior corneal astigmatism showed no significant change, falling from 0.44 ± 0.12 D preoperatively to 0.42 ± 0.13 D postoperatively (p=0.18). Refractive astigmatism decreased significantly, from 0.92 ± 0.51 D preoperatively to 0.27 ± 0.44 D postoperatively (p<0.001). The anterior surface showed with-the-rule astigmatism in 51 eyes (96%) preoperatively and 48 eyes (91%) postoperatively. By contrast, the posterior surface showed against-the-rule astigmatism in all eyes preoperatively and postoperatively. Conclusions. The surgical effects were largely attributed to the astigmatic correction of the anterior corneal surface. Posterior corneal astigmatism remained unchanged even after ReLEx for myopic astigmatism.http://dx.doi.org/10.1155/2015/915853 |
| spellingShingle | Kazutaka Kamiya Kimiya Shimizu Mayumi Yamagishi Akihito Igarashi Hidenaga Kobashi Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism Journal of Ophthalmology |
| title | Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism |
| title_full | Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism |
| title_fullStr | Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism |
| title_full_unstemmed | Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism |
| title_short | Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism |
| title_sort | anterior and posterior corneal astigmatism after refractive lenticule extraction for myopic astigmatism |
| url | http://dx.doi.org/10.1155/2015/915853 |
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