Evaluation of apparent ectasia of the posterior surface of the cornea after keratorefractive surgery.
作者： Yoshiaki Nawa , Kozo Masuda , Tetsuo Ueda , Yoshiaki Hara , Hiroshi Uozato
DOI: 10.1016/J.JCRS.2004.05.050
关键词: Ablation 、 Dioptre 、 Ophthalmology 、 Cornea 、 Keratorefractive surgery 、 Radius of curvature (optics) 、 Ectasia 、 Corneal surface 、 Magnification 、 Medicine
摘要: Purpose To calculate the apparent posterior corneal changes after keratorefractive surgery and reevaluate ectasia displayed by Orbscan (Orbtek). Setting Department of Ophthalmology, Nara Medical University, Nara, Japan. Methods Postoperative:preoperative magnification ratio surface cornea was calculated in a theoretical eye model. Results Assuming preoperative thickness is 600.00 μm, refractive power anterior 48.0 diopters (D), 1.376, ablation diameter 6.0 mm, postoperative 480.00 38.0 D, does not change postoperatively, image becomes 0.778% smaller postoperatively. If radius curvature 6.2 it 48.24 μm. this directly affects difference map, moves forward Conclusion The results correspond to amount previous reports. This artifact may explain detected Orbscan.
elsevier.com
sci-hub.se 参考文章(11)
Zheng Wang, Jiaqi Chen, Bin Yang, Posterior corneal surface topographic changes after laser in situ keratomileusis are related to residual corneal bed thickness Ophthalmology. ,vol. 106, pp. 406- 410 ,(1999) , 10.1016/S0161-6420(99)90083-0
Kazutaka Kamiya, Tetsuro Oshika, Shiro Amano, Tetsuya Takahashi, Tadatoshi Tokunaga, Kazunori Miyata, Influence of excimer laser photorefractive keratectomy on the posterior corneal surface. Journal of Cataract and Refractive Surgery. ,vol. 26, pp. 867- 871 ,(2000) , 10.1016/S0886-3350(00)00429-6
Kazunori Miyata, Kazutaka Kamiya, Tetsuya Takahashi, Tatsuro Tanabe, Tadatoshi Tokunaga, Shiro Amano, Tetsuro Oshika, Time Course of Changes in Corneal Forward Shift After Excimer Laser Photorefractive Keratectomy Archives of Ophthalmology. ,vol. 120, pp. 896- 900 ,(2002) , 10.1001/ARCHOPHT.120.7.896
Yoshiaki Nawa, Tetsuo Ueda, Kozo Masuda, Hidetoshi Ishibashi, Yoshiaki Hara, Hiroshi Uozato, Evaluation of the corneal endothelium after hyperopic laser in situ keratomileusis. Journal of Cataract and Refractive Surgery. ,vol. 29, pp. 1543- 1545 ,(2003) , 10.1016/S0886-3350(03)00460-7
Berthold Seitz, Francia Torres, Achim Langenbucher, Ashley Behrens, Enrique Suárez, Posterior corneal curvature changes after myopic laser in situ keratomileusis Ophthalmology. ,vol. 108, pp. 666- 672 ,(2001) , 10.1016/S0161-6420(00)00581-9
Susan Ormonde, Christine Waterman, Charles Mcghee, Changes in the posterior corneal surface after LASIK. Journal of Cataract and Refractive Surgery. ,vol. 30, pp. 533- 534 ,(2004) , 10.1016/J.JCRS.2004.02.002
Gerard Cairns, Charles N.J. McGhee, Michael J. Collins, Helen Owens, Greg D. Gamble, Accuracy of orbscan II slit-scanning elevation topography Journal of Cataract and Refractive Surgery. ,vol. 28, pp. 2181- 2187 ,(2002) , 10.1016/S0886-3350(02)01504-3
Shehzad A. Naroo, Neil W. Charman, Changes in posterior corneal curvature after photorefractive keratectomy. Journal of Cataract and Refractive Surgery. ,vol. 26, pp. 872- 878 ,(2000) , 10.1016/S0886-3350(00)00413-2
Everardo Hernández-Quintela, Sopit Samapunphong, Bilal F Khan, Beatriz Gonzalez, Paul Chung-Shien Lu, Samir G Farah, Dimitri T Azar, Posterior corneal surface changes after refractive surgery Ophthalmology. ,vol. 108, pp. 1415- 1422 ,(2001) , 10.1016/S0161-6420(01)00634-0
Robert K Maloney, Discussion by Robert K. Maloney, MD Ophthalmology. ,vol. 106, pp. 409- 410 ,(1999) , 10.1016/S0161-6420(99)90087-8