目的：探究囊袋张力环(CTR)植入对五种新一代人工晶状体(IOL)计算公式[Barrett Universal Ⅱ (BUⅡ), Emmetropia Verifying Optical (EVO), Kane, Pearl-DGS和Hill-RBF 2.0]在高度近视患者中预测准确性的影响。方法：前瞻性病例对照研究。观察2020年12月—2021年9月于陕西省眼科医院就诊的眼轴长度(axial length,AL)≥ 27.00 mm行白内障联合IOL(AR40E, 美国强生)植入术的患者。术眼随机分为植入CTR组(A组)和未植入CTR组(B组)。术前根据IOLMaster700测量眼部参数，使用BU Ⅱ公式计算所需IOL度数。记录术后1周、1个月及3个月实际等效球镜度(spherical equivalent,SE)，计算并比较五种公式预测误差(prediction error,PE)和绝对屈光预测误差(absolute Error,AE)。将A组和B组分别分为A1组(27.00 mm ≤ AL ≤ 30.00 mm)和A2组(AL>30.00 mm)；B1组(27.00 mm ≤ AL ≤ 30.00 mm)和B2组(AL >30.00 mm)，分析不同AL范围内CTR植入对公式预测准确性的影响。结果：共纳入患者63例(89眼)，年龄(55.93±10.17)岁，术前AL为(30.30±2.18)mm。A组、A1组及A2组术后不同时间SE值比较差异均无统计学意义(P>0.05)，B组、B1组及B2组术后1周与1个月，术后1周与3月SE值分别比较差异有统计学意义(P<0.05)，术后1个月与3个月比较，差异无统计学意义(P>0.05)。A组、B组、A1组、A2组、B1组和B2组各组中五种公式的AE值比较差异均无统计学意义(均P>0.05)。植入CTR后五种公式的预测误差变化比较差异无统计学意义(P>0.05)。结论：对于AL ≥27.00 mm的白内障患者，植入CTR组术后1周屈光度趋于稳定，未植入组术后1个月屈光度趋于稳定。CTR植入对五种公式预测准确性和选择无影响，五种计算公式均可正常选择。

Objective: To investigate the predictive accuracy and effect of capsular tension ring (CTR) implantation with five new generation intraocular lens (IOL) calculation formulas [Barrett Universal Ⅱ (BU Ⅱ), Emmetropia Verifying Optical(EVO), Kane, Pearl-DGS and Hill-RBF 2.0] in high myopia patients. Methods: This is a prospective case-control study. The patients were enrolled with an axial length (AL)≥27.00 mm, and underwent cataract surgery with AR40E IOL implantation at the Shaanxi Eye Hospital from December 2020 to September 2021. The patients were randomly assigned to the CTR implantation group (group A) and the non-CTR implantation group (group B). With the ocular parameters measured by the IOLMaster700, the IOL power was calculated with the BUⅡformula before surgery. The postoperative actual equivalent spherical diopter (SE) were recorded,and the predicted error (PE) and absolute error (AE) using the five formulas were recorded and compared at 1 week, 1 month, and 3 months, repsectively. Group A was divided to A1 (27.00 mm ≤ AL ≤ 30.00 mm) and A2 (AL>30.00 mm), and group B was divided to B1 (27.00 mm ≤ AL ≤ 30.00 mm) and B2 (AL>30.00 mm). The effects of CTR implantation and the accuracy of the formulas were analyzed with different AL ranges. Results: A total of 63 patients (89 eyes) were included, aged (55.93±10.17) years old, with preoperative AL (30.30± 2.18)mm. There was no statistically significant difference in SE between groups A, A1, and A2 (P>0.05) at different postoperative times. While there was a statistically significant difference in SE between groups B, B1, and B2 (P < 0.05) at 1 week and 1 month after surgery, and between 1 week and 3 months after surgery. There was no statistically significant difference between 1 month and 3 months after suergery (P>0.05). There was no significant difference in the AE using the five formulas among groups A, B, A1, A2, B1, and B2 (P>0.05). There was no statistically significant difference in prediction error changes among the five formulas after CTR implantation (P>0.05). Conclusion: For cataract patients with AL ≥ 27.00 mm, the refractionvalue in the CTR implantation group tended to stabilizeafter one week of surgery. While in the non-CTR implantation group, the refractionvalue tended to stabilize after one month. CTR implantation had no effect on the accuracy and selection of the five formula, and the five IOL calculation formulas can be normally selected.

目的：探究囊袋张力环(CTR)植入对五种新一代人工晶状体(IOL)计算公式[Barrett Universal Ⅱ (BUⅡ),Emmetropia Verifying Optical (EVO), Kane, Pearl-DGS和Hill-RBF 2.0]在高度近视患者中预测准确性的影响。方法：前瞻性病例对照研究。观察2020年12月—2021年9月于陕西省眼科医院就诊的眼轴长度(AL)≥27.00 mm行白内障联合IOL(AR40E, 美国强生)植入术的患者。术眼随机分为植入CTR组(A组)和未植入CTR组(B组)。术前根据IOL-Master 700测量眼部参数，使用BU Ⅱ公式计算所需IOL度数。记录术后1周、1个月及3个月实际等效球镜度(SE)，计算并比较五种公式预测误差(PE)和绝对屈光预测误差(AE)。将A组和B组分别分为A1组(27.00 mm ≤ AL ≤ 30.00 mm)和A2组(AL>30.00 mm)；B1组(27.00 mm ≤ AL ≤30.00 mm)和B2组(AL >30.00 mm)，分析不同AL范围内CTR植入对公式预测准确性的影响。结果：共纳入患者63例(89眼)，年龄(55.93±10.17)岁，术前AL为(30.30±2.18)mm。A组、A1组及A2组术后不同时间SE值比较差异均无统计学意义(P>0.05)，B组、B1组及B2组术后1周与1个月，术后1周与3月SE值分别比较差异有统计学意义(P<0.05)，术后1个月与3月无统计学差异(P>0.05)。A组、B组、A1组、A2组、B1组和B2组各组中五种公式的AE值比较差异均无统计学意义(H= 9.27, P= 0.06, H= 7.09, P= 0.13, H= 2.44, P= 0.66,H= 8.56, P= 0.07, H= 4.16, P= 0.39, H= 8.72, P= 0.07)。植入CTR后五种公式的预测误差变化比较差异无统计学意义(P>0.05)。结论：对于AL ≥27.00 mm的白内障患者，植入CTR组术后1周屈光度趋于稳定，未植入组术后1个月屈光度趋于稳定。CTR植入对五种公式预测准确性和选择无影响，五种计算公式均可正常选择。

Objective: To investigate the predictive accuracy andeffect of capsular tension ring (CTR) implantation with fivenew generation intraocular lens (IOL) calculation formulas [Barrett Universal Ⅱ (BU Ⅱ ), Emmetropia VerifyingOptical (EVO), Kane, Pearl-DGS and Hill-RBF 2.0] in high myopia patients. Methods: This is a prospectivecase-control study. The patients were enrolled with an axial length (AL)≥27.00 mm, and underwent cataract surgery with AR40E IOL implantation at the Shaanxi Eye Hospital from December 2020 to September 2021. Thepatients were randomly assigned to the CTR implantation group (group A) and the non-CTR implantation group(group B). With the ocular parameters measured by the IOL-Master 700, the IOL power was calculated with theBU Ⅱ formula before surgery. The postoperative actual equivalent spherical diopter (SE) were recorded,and the predicted error (PE) and absolute error (AE) using the five formulas were recorded and compared at 1 week, 1 month, and 3 months, repsectively. Group A was divided to A1 (27.00 mm ≤ AL ≤ 30.00 mm) and A2 (AL>30.00 mm), and group B was divided to B1 (27.00 mm ≤ AL ≤ 30.00 mm) and B2 (AL>30.00 mm). The effects of CTR implantation and the accuracy of the formulaswere analyzed with different AL ranges. Results: A total of 63 patients (89 eyes) were included, aged (55.93±10.17) years old, with preoperative AL (30.30± 2.18) mm. There was no statistically significant difference in SE between groups A, A1, and A2 (P>0.05) at different postoperative times. While there was a statistically significant difference in SE between groups B, B1, and B2 (P < 0.05) at 1 week and 1 month after surgery, and between 1 week and 3 months after surgery. There was no statistically significant difference between 1 month and 3 months after suergery (P>0.05). There was no significant difference in the AE using the five formulas among groups A, B, A1, A2, B1, and B2 (H= 9.27, P= 0.06, H= 7.09, P= 0.13, H= 2.44, P= 0.66,H= 8.56, P= 0.07, H= 4.16, P= 0.39, H= 8.72, P= 0.07). There was no statistically significant difference in prediction error changes among the five formulas after CTR implantation (P>0.05). Conclusion: For cataract patients with AL ≥27.00 mm, the refractionvalue in the CTR implantation group tended to stabilizeafter one week of surgery. While in the non-CTR implantation group, the refractionvalue tended to stabilize after one month. CTR implantation had no effect on the accuracy and selection of the five formula, and the five IOL calculation formulas can be normally selected.