From the Xi'an AIER Eye Hospital (K. Li, Zhang, S. Wang, Song, Y. Li), Xi'an, Shaan'xi Province, AIER School of Ophthalmology, AIER Eye and Refractive Institute, Central South University (K. Li, Z. Wang, M. Wang), Changsha, Hunan Province, China.
J Cataract Refract Surg. 2020 Oct;46(10):1339-1345. doi: 10.1097/j.jcrs.0000000000000262.
To quantitatively evaluate the safety, efficacy, stability, predictability, and corneal biomechanical parameters after V4c implantable collamer lens (ICL) implantation in subclinical keratoconus.
Xi'an AIER Eye Hospital, Xi'an, China.
Retrospective case series.
Patients undergoing V4c ICL/toric ICL implantation were examined. Scheimpflug tomography (Pentacam) was used to measure the Belin-Ambrosio enhanced ectasia total deviation index. Dynamic Scheimpflug biomechanical analysis (CorVis ST) was used to measure the corneal biomechanical parameters and Corvis Biomechanical Index. The Tomographic and Biomechanical Index was measured by combined Pentacam with CorVis ST. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refraction, and adverse effects were also investigated.
A total of 60 eyes of 60 patients (mean age ± SD, 27.21 ± 7.24 years) were included. The mean preoperative UDVA and CDVA were 1.08 ± 0.25 and 0.12 ± 0.04 logarithm of the minimum angle of resolution (logMAR) (20/230 and 20/28 Snellen VA), respectively. After 2 years, the mean postoperative UDVA and CDVA were 0.01 ± 0.06 and -0.05 ± 0.03 logMAR (20/20 and 20/18 Snellen VA), respectively. The mean difference between the intended and achieved spherical equivalent (SE) was -0.08 ± 0.47 diopter (D), and the SE was within ±1.00 D of the intended correction in 57 eyes (95%), and 58 eyes (97%) had astigmatism less than 0.50 D. The refractive results were stable 2 years postoperatively, and the corneal biomechanical parameters returned to their preoperative levels at 3 months.
The V4c ICL/toric ICL in subclinical keratoconus offered predictable correction of SE refractive error. Refractive results and corneal biomechanics were stable at the 2-year follow-up.
定量评估亚临床圆锥角膜患者行 V4c 可植入式隐形眼镜（ICL）植入术后的安全性、有效性、稳定性、可预测性和角膜生物力学参数。
中国西安爱尔眼科医院。
回顾性病例系列。
对行 V4c ICL/散光 ICL 植入术的患者进行检查。采用 Scheimpflug 断层扫描（Pentacam）测量 Belin-Ambrosio 增强扩张总偏差指数。采用动态 Scheimpflug 生物力学分析（CorVis ST）测量角膜生物力学参数和 Corvis 生物力学指数。通过 Pentacam 与 CorVis ST 的联合测量得出 Tomographic 和 Biomechanical Index。还研究了未矫正距离视力（UDVA）、矫正距离视力（CDVA）、屈光度和不良反应。
共纳入 60 例（60 只眼）患者（平均年龄±标准差，27.21±7.24 岁）。术前 UDVA 和 CDVA 平均值分别为 1.08±0.25 和 0.12±0.04 最小分辨角对数视力（logMAR）（20/230 和 20/28 视力）。2 年后，平均术后 UDVA 和 CDVA 分别为 0.01±0.06 和-0.05±0.03 logMAR（20/20 和 20/18 视力）。期望的和实际的球镜等效（SE）之间的平均差异为-0.08±0.47 屈光度（D），在 57 只眼中（95%）SE 在±1.00 D 的期望矫正范围内，58 只眼（97%）散光小于 0.50 D。术后 2 年时屈光结果稳定，角膜生物力学参数在术后 3 个月时恢复到术前水平。
在亚临床圆锥角膜中，V4c ICL/散光 ICL 可预测性矫正 SE 屈光不正。在 2 年的随访中，屈光结果和角膜生物力学稳定。
