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Abstract：
BACKGROUND: To comparatively analyze the surgically induced astigmatism (SIA) of the anterior, posterior, and total corneas of eyes undertaking implantable collamer lens (ICL) implantation with temporal or superior corneal incisions.
METHODS: One hundred and nine eyes of 109 patients who received ICL implantation were recruited: 40 eyes had temporal incisions and 69 eyes had superior incisions. Total corneal refractive power (TCRP); simulated keratometry of the anterior (Sim-KAnt) and posterior (Sim-KPost) corneal curvature; and astigmatism of the anterior (CAAnt), posterior (CAPost), and total (CATCRP) cornea were recorded through a Pentacam preoperatively and 3 months postoperatively. The SIA of the anterior, posterior, and total cornea were also compared between the two groups.
RESULTS: There were no significant intergroup differences for TCRP, Sim-KAnt, Sim-KPost, CAAnt, CAPost, or CATCRP, preoperatively. However, values of CAAnt, CAPost, and CATCRP with temporal incision were significantly higher than those parameters with superior incision postoperatively. All of the SIA of the anterior, posterior, and total cornea were significantly lower for temporal incision than those with a superior incision (p < 0.001, p = 0.006 and p = 0.001 respectively). Meanwhile, the superior incisions created against-the-rule (ATR) astigmatism, and temporal incisions always induce with-the-rule (WTR) astigmatism in total cornea.
CONCLUSIONS: A superior incision may be suitable for correcting WTR astigmatism, while a temporal incision for correcting ATR astigmatism when using a non-toric ICL. Meanwhile, temporal incision could be a better choice with little preoperative astigmatism or that preoperative astigmatism would be corrected with toric ICLs.
BACKGROUND: Registration number: ChiCTR2100051739. Prospectively registered: 01 October 2021.
METHODS: One hundred and nine eyes of 109 patients who received ICL implantation were recruited: 40 eyes had temporal incisions and 69 eyes had superior incisions. Total corneal refractive power (TCRP); simulated keratometry of the anterior (Sim-KAnt) and posterior (Sim-KPost) corneal curvature; and astigmatism of the anterior (CAAnt), posterior (CAPost), and total (CATCRP) cornea were recorded through a Pentacam preoperatively and 3 months postoperatively. The SIA of the anterior, posterior, and total cornea were also compared between the two groups.
RESULTS: There were no significant intergroup differences for TCRP, Sim-KAnt, Sim-KPost, CAAnt, CAPost, or CATCRP, preoperatively. However, values of CAAnt, CAPost, and CATCRP with temporal incision were significantly higher than those parameters with superior incision postoperatively. All of the SIA of the anterior, posterior, and total cornea were significantly lower for temporal incision than those with a superior incision (p < 0.001, p = 0.006 and p = 0.001 respectively). Meanwhile, the superior incisions created against-the-rule (ATR) astigmatism, and temporal incisions always induce with-the-rule (WTR) astigmatism in total cornea.
CONCLUSIONS: A superior incision may be suitable for correcting WTR astigmatism, while a temporal incision for correcting ATR astigmatism when using a non-toric ICL. Meanwhile, temporal incision could be a better choice with little preoperative astigmatism or that preoperative astigmatism would be corrected with toric ICLs.
BACKGROUND: Registration number: ChiCTR2100051739. Prospectively registered: 01 October 2021.
摘要：
背景：为了比较分析手术引起的前牙散光（SIA），后部,采用颞侧或上角膜切口进行植入式结晶体(ICL)植入的眼睛的角膜总数。
方法：招募了109例接受ICL植入的患者的109只眼：40只眼有颞部切口，69只眼有上切口。总角膜屈光力（TCRP）；前角膜曲率（Sim-KAnt）和后角膜曲率（Sim-KPost）的模拟角膜曲率测量；和前散光（CAAnt），后部(CAPost),术前和术后3个月通过Pentacam记录角膜总数（CATCRP）。前部的SIA，后部,比较两组患者的角膜总数。
结果：TCRP没有显著的组间差异，Sim-KAnt,Sim-KPost,CAAnt,CAPost,或CATCRP，术前。然而,CAAnt的值，CAPost,术后颞侧切口的CATCRP明显高于上切口的参数。所有前部的SIA，后部,颞侧切口的角膜和总角膜明显低于上切口的角膜（分别为p<0.001，p=0.006和p=0.001）。同时,反对规则（ATR）散光创建的上级切口，颞侧切口总是在全角膜中引起规则（WTR）散光。
结论：上切口可能适合矫正WTR散光，而当使用非复曲面ICL时，用于校正ATR散光的时间切口。同时,颞部切口可能是更好的选择，术前散光较小，或者术前散光可以通过复曲面ICL矫正。
背景：注册号：ChiCTR2100051739。提前注册：2021年10月1日。
方法：招募了109例接受ICL植入的患者的109只眼：40只眼有颞部切口，69只眼有上切口。总角膜屈光力（TCRP）；前角膜曲率（Sim-KAnt）和后角膜曲率（Sim-KPost）的模拟角膜曲率测量；和前散光（CAAnt），后部(CAPost),术前和术后3个月通过Pentacam记录角膜总数（CATCRP）。前部的SIA，后部,比较两组患者的角膜总数。
结果：TCRP没有显著的组间差异，Sim-KAnt,Sim-KPost,CAAnt,CAPost,或CATCRP，术前。然而,CAAnt的值，CAPost,术后颞侧切口的CATCRP明显高于上切口的参数。所有前部的SIA，后部,颞侧切口的角膜和总角膜明显低于上切口的角膜（分别为p<0.001，p=0.006和p=0.001）。同时,反对规则（ATR）散光创建的上级切口，颞侧切口总是在全角膜中引起规则（WTR）散光。
结论：上切口可能适合矫正WTR散光，而当使用非复曲面ICL时，用于校正ATR散光的时间切口。同时,颞部切口可能是更好的选择，术前散光较小，或者术前散光可以通过复曲面ICL矫正。
背景：注册号：ChiCTR2100051739。提前注册：2021年10月1日。
