AIM:To evaluate the clinical and tomographic outcomes after implantation of a new intrastromal corneal ring segment(ICRS) with 140-degrees of arc in eyes with corneal ectasia.METHODS:We evaluated patients with cor...AIM:To evaluate the clinical and tomographic outcomes after implantation of a new intrastromal corneal ring segment(ICRS) with 140-degrees of arc in eyes with corneal ectasia.METHODS:We evaluated patients with corneal ectasia implanted with Ferrara 140° ICRS from April 2010 to February 2015.Outcome measures included preoperative and postoperative corrected distance visual acuity(CDVA),keratometry simulated(K) reading,tomographic astigmatism and asphericity.All patients were evaluated using the Pentacam Scheimpflug system.RESULTS:The study evaluated 58 eyes.The mean followup was 16.81±10.8 mo.The CDVA(logM AR) improved from 0.5±0.20(20/60) to 0.3±0.21(20/40)(P〈0.01).The average K reduced from 49.87±7.01 to 47.34±4.90 D(P〈0.01).The asphericity changed from-0.60±0.86 to-0.23±0.67 D(P〈0.01).The mean preoperative tomographic astigmatism decreased from-8.0±3.45 to-4.53±2.52 D(P〈0.01).CONCLUSION:The new ICRS model with 140-degrees of arc effectively improve the visual acuity and reduce the high astigmatism usually found in patients with corneal ectasia.展开更多
文摘AIM:To evaluate the clinical and tomographic outcomes after implantation of a new intrastromal corneal ring segment(ICRS) with 140-degrees of arc in eyes with corneal ectasia.METHODS:We evaluated patients with corneal ectasia implanted with Ferrara 140° ICRS from April 2010 to February 2015.Outcome measures included preoperative and postoperative corrected distance visual acuity(CDVA),keratometry simulated(K) reading,tomographic astigmatism and asphericity.All patients were evaluated using the Pentacam Scheimpflug system.RESULTS:The study evaluated 58 eyes.The mean followup was 16.81±10.8 mo.The CDVA(logM AR) improved from 0.5±0.20(20/60) to 0.3±0.21(20/40)(P〈0.01).The average K reduced from 49.87±7.01 to 47.34±4.90 D(P〈0.01).The asphericity changed from-0.60±0.86 to-0.23±0.67 D(P〈0.01).The mean preoperative tomographic astigmatism decreased from-8.0±3.45 to-4.53±2.52 D(P〈0.01).CONCLUSION:The new ICRS model with 140-degrees of arc effectively improve the visual acuity and reduce the high astigmatism usually found in patients with corneal ectasia.