Departments of Glaucoma.
Research, Association to Prevent Blindness in Mexico, Mexico City, Mexico.
J Glaucoma. 2021 Apr 1;30(4):e180-e183. doi: 10.1097/IJG.0000000000001777.
Surgeons that perform cataract surgery combined with endocyclophotocoagulation (ECP) should rely on their preferred intraocular lens (IOL) calculation formula. There is no need to perform any correction to the IOL power, as this procedure does not modify the refractive outcome.
The purpose of this study was to compare postoperative refractive outcomes in patients with glaucoma who underwent phacoemulsification and IOL implantation with or without ECP and the change in intraocular pressure (IOP) and number of antiglaucoma medications between groups.
A cross-sectional study in which the medical records of the patients with any type of glaucoma, who underwent phacoemulsification with IOL implantation in the capsular bag in addition to ECP or as a standalone procedure from June 2016 to August 2019 were analyzed. Clinical data collected included axial length, steep, flat, and mean keratometry values, target spherical equivalent (SE) estimated by the SRK/T formula, manifest refraction SE at the 1-month follow-up, IOP, and number of antiglaucoma medications before and 12 months after surgery. Primary and secondary outcome measures were the mean predictive error (MPE), the postoperative SE, and the change in IOP after surgery in both groups, respectively. Significance was assessed using the Student t test for all variables between groups according to data distribution. P-values <0.05 were considered to be statistically significant.
A total of 196 eyes of 196 patients were included, 98 in the combined phacoemulsification-ECP group, and 98 in the non-ECP group. The observed MPE was -0.043±0.44, and 0.06±0.38 D MPE, respectively (P=0.079). Overall, 74.34% in the phacoemulsification-ECP group and 78.4% in the non-ECP group had a postoperative SE of ±0.50. The ECP group had lower IOP and a greater decrease in antiglaucoma medications at 12 months of follow-up.
SRK/T formula performed well in both groups, with no statistically significant difference in the MPE and the percentage of eyes achieving postoperative SE of ±0.50. We consider it is unnecessary to perform any kind of correction to the IOL power calculation when performing ECP.
行白内障超声乳化吸除术联合内眼环光凝术（ECP）的术者应依据其偏爱的眼内晶状体（IOL）计算公式。无需对 IOL 屈光力进行任何校正，因为该手术不会改变屈光结果。
本研究旨在比较行超声乳化白内障吸除术联合 IOL 植入术的青光眼患者与单纯行超声乳化白内障吸除术联合 IOL 植入术或 ECP 患者的术后屈光状态、眼压（IOP）变化及抗青光眼药物使用情况。
回顾性分析 2016 年 6 月至 2019 年 8 月行超声乳化白内障吸除术联合 IOL 植入术的各种类型青光眼患者的病历资料，包括行白内障超声乳化吸除术联合 IOL 植入术联合 ECP 患者（ECP 组）和单纯行白内障超声乳化吸除术联合 IOL 植入术患者（非 ECP 组）。收集的临床资料包括眼轴长度、陡峭角膜、平坦角膜和平均角膜曲率值、SRK/T 公式预测的目标球镜等效值、术后 1 个月的实际球镜等效值、IOP 和术前及术后 12 个月的抗青光眼药物使用情况。主要观察指标为两组的平均预测误差（MPE）、术后等效球镜（SE）和术后眼压变化。根据数据分布，采用 Student t 检验比较两组间所有变量的差异，P 值＜0.05 为差异有统计学意义。
共纳入 196 例（196 只眼）患者，其中 ECP 组 98 例，非 ECP 组 98 例。观察到的 MPE 分别为-0.043±0.44 和 0.06±0.38 D（P=0.079）。总体而言，ECP 组和非 ECP 组术后 SE 为±0.50 的患者比例分别为 74.34%和 78.4%。ECP 组术后眼压较低，随访 12 个月时抗青光眼药物使用量减少。
SRK/T 公式在两组中的表现均良好，MPE 及术后 SE 为±0.50 的眼比例无统计学差异。我们认为，行 ECP 时无需对 IOL 屈光力计算进行任何校正。
