Evaluation of anterior and posterior surfaces of the cornea using a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments  

作　　者：Leonardo Torquetti Carlos Arce Jesus Merayo-Lloves Guilherme Ferrara Paulo Ferrara Breenno Signorelli Armando Signorelli 

机构地区：[1]Center for Excellence in Ophthalmology, Para de Minas 35660-051, Brazil [2]Arce Clinic, Campinas 13106-028, Brazil [3]Fernandez-Vega Eye Institute, Oviedo 33012, Spain [4]paulo Ferrara Eye Clinic, Belo Horizonte 30110-921, Brazil [5]Campineiro Microsurgery Eye Center, Campinas 13013-161,Brazil

出　　处：《International Journal of Ophthalmology(English edition)》2016年第9期1283-1288,共6页国际眼科杂志（英文版）

摘　　要：AIM：To evaluate corneal parameters measured with a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments（ICRS）.METHODS：Fifty eyes of 40 keratoconus patients had Ferrara ICRS implantation from November 2010 to April2014.Uncorrected visual acuity（UCVA）,best corrected visual acuity（BCVA）,refraction,keratometry,asphericity,elevation,pachymetry,root mean square（RMS）,spherical aberration and coma were studied.All patients were evaluated using a dual Scheimpflug system.RESULTS：The mean follow-up time after the procedure was 12.7mo.The mean UCVA improved from0.82 to 0.31（P〈0.001）;the mean BCVA improved from0.42 to 0.05（P〈0.0001）,the mean spherical refraction changed from-3.06 ±3.80 D to-0.80 ±2.5 D（P〈0.0001）and the mean refraction astigmatism reduced from-4.51 ±2.08 D to-2.26±1.18 D（P〈0.0001）.The changes from preoperative to postoperative,in parameters of the anterior and posterior surface of the cornea,were statistically significant except the elevation posterior at the apex of the cornea and posterior asphericity.CONCLUSION：The implantation of Ferrara ICRS induces changes in both anterior and posterior surfaces of the cornea.AIM：To evaluate corneal parameters measured with a dual Scheimpflug analyzer in keratoconus patients implanted with intrastromal corneal ring segments（ICRS）.METHODS：Fifty eyes of 40 keratoconus patients had Ferrara ICRS implantation from November 2010 to April2014.Uncorrected visual acuity（UCVA）,best corrected visual acuity（BCVA）,refraction,keratometry,asphericity,elevation,pachymetry,root mean square（RMS）,spherical aberration and coma were studied.All patients were evaluated using a dual Scheimpflug system.RESULTS：The mean follow-up time after the procedure was 12.7mo.The mean UCVA improved from0.82 to 0.31（P〈0.001）;the mean BCVA improved from0.42 to 0.05（P〈0.0001）,the mean spherical refraction changed from-3.06 ±3.80 D to-0.80 ±2.5 D（P〈0.0001）and the mean refraction astigmatism reduced from-4.51 ±2.08 D to-2.26±1.18 D（P〈0.0001）.The changes from preoperative to postoperative,in parameters of the anterior and posterior surface of the cornea,were statistically significant except the elevation posterior at the apex of the cornea and posterior asphericity.CONCLUSION：The implantation of Ferrara ICRS induces changes in both anterior and posterior surfaces of the cornea.

关 键 词：KERATOCONUS intrastromal comeal ringsegments dual Scheimpflug 

分 类 号：R779.6[医药卫生—眼科]