Sandes Jordana, Stival Larissa R S, de Ávila Marcos Pereira, Ferrara Paulo, Ferrara Guilherme, Magacho Leopoldo, Araújo Luana P N, Torquetti Leonardo
Center of Reference in Ophthalmology (CEROF), Goiânia 64605-020, Brazil.
Paulo Ferrara Eye Clinic, Belo Horizonte-MG 30110-921, Brazil.
Int J Ophthalmol. 2018 May 18;11(5):802-806. doi: 10.18240/ijo.2018.05.14. eCollection 2018.
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.
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.
The study evaluated 58 eyes. The mean follow-up was 16.81±10.8mo. The CDVA (logMAR) improved from 0.5±0.20 (20/60) to 0.3±0.21 (20/40) (<0.01). The average K reduced from 49.87±7.01 to 47.34±4.90 D (<0.01). The asphericity changed from -0.60±0.86 to -0.23±0.67 D (<0.01). The mean preoperative tomographic astigmatism decreased from -8.0±3.45 to -4.53±2.52 D (<0.01).
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.
评估在患有角膜扩张症的眼中植入一种新型140度弧的基质内角膜环片（ICRS）后的临床和断层扫描结果。
我们评估了2010年4月至2015年2月期间植入费拉拉140° ICRS的角膜扩张症患者。结果指标包括术前和术后矫正远视力（CDVA）、模拟角膜曲率计（K）读数、断层扫描散光和非球面性。所有患者均使用Pentacam Scheimpflug系统进行评估。
该研究评估了58只眼。平均随访时间为16.81±10.8个月。CDVA（logMAR）从0.5±0.20（20/60）提高到0.3±0.21（20/40）（<0.01）。平均角膜曲率从49.87±7.01降至47.34±4.90 D（<0.01）。非球面性从-0.60±0.86变为-0.23±0.67 D（<0.01）。术前平均断层扫描散光从-8.0±3.45降至-4.53±2.52 D（<0.01）。
新型140度弧的ICRS模型有效提高了视力，并降低了角膜扩张症患者中常见的高度散光。
