目的：评估新一代基于人工智能(artificial intelligence,AI)的人工晶状体(intraocular lens,IOL)计算公式的准确性。方法：本研究为回顾性研究，纳入因白内障行晶状体超声乳化联合IOL植入术的262例患者262眼。在术前，通过IOLMaster700获取角膜曲率、角膜白到白、中央角膜厚度、前房深度、晶状体厚度以及眼轴长度。使用第三代公式(SRK/T、Holladay 1和Hoffer Q)、Barrett UniversalⅡ(BUⅡ)、新一代AI公式(Kane、Pearl-DGS、Hill-RBF 3.0、Hoffer QST和Jin-AI)对术后屈光状态进行计算，并与术后实际的屈光状态进行比较。在将预测误差(prediction error,PE)归零后，分析了各公式的标准差(standard deviation,SD)、绝对误差均值(mean absolute error,MAE)、绝对误差中位数(median absolute error,MedAE)以及PE在±0.25、±0.50、±1.00、±2.00 D范围内的百分比。结果：基于AI的IOL屈光力计算公式的SD、MAE和MedAE的范围分别为0.37 D(Kane和Jin-AI)至0.39 D(Hoffer QST)、0.28 D(Hill-RBF 3.0和Jin-AI)至0.31 D(Hoffer QST)以及0.21 D(Hill-RBF3.0和Jin-AI)至0.24 D(HofferQST)；均低于第三代公式(SD：0.43 D~0.45 D；MAE：0.34 D；MedAE：0.25 D~0.28 D)。在所有公式中，Jin-AI公式预测误差在±0.50 D的比例最高，为84.73%，Kane(84.35%)和BUⅡ(83.97%)公式次之。结论：在IOL屈光力预测上，与传统第三代公式相比，新一代基于AI的公式表现出更高的准确性，可以使更多的患者在术后获得预期的屈光状态。

Objective: To evaluate the accuracy of new generation artificial intelligence (AI)-based intraocular lens (IOL)power calculation formulas. Methods: This retrospective study included a total of 262 eyes from 262 patients with cataract who underwent uneventful phacoemulsification combined with IOL implantation. Keratometry, corneal white-to-white, central corneal thickness, anterior chamber depth, lens thickness, and axial length were measured by the IOL Master 700 before surgery. Predicted refractive errors were calculated by the third-generation formulas (SRK/T, Holladay 1, and Hoffer Q), Barrett UniversalⅡ (BUⅡ), and the newer-generation AI formulas (Kane, Pearl-DGS, Hill-RBF 3.0, Hoffer QST, and Jin-AI), and were compared with the actual postoperative refractive value. After adjusting the prediction error (PE) to zero, the standard deviation (SD), mean absolute error (MAE), median absolute error (MedAE), and the percentage of a PE within the range of ±0.25 diopter (D), ±0.50 D, ±1.00 D, and ±2.00 D were analyzed. Results: The SD, MAE, and MedAE of the AI-based formulas ranged from 0.37 D (Kane and Jin-AI) to 0.39 D (Hoffer QST), 0.28 D (Hill-RBF 3.0 and Jin-AI) to 0.31 D (Hoffer QST), and 0.21 D (Hill-RBF 3.0 and Jin-AI) to 0.24 D (Hoffer QST), respectively. These values were all lower than those of the third-generation formula (SD: 0.43 D to 0.45 D; MAE: 0.34 D; MedAE: 0.25 D to 0.28 D). Among all the formulas, the Jin-AI formula had the highest proportion of a PE within ±0.50 D (84.73%), followed by Kane (84.35%) and BUⅡ (83.97%) formulas. Conclusion: The new AI-based IOL formulas show higher accuracy compared with the traditional third-generation ones in predicting IOL power. thereby enabling more patients to achieve the expected refractive outcomes after surgery

目的：比较六种新一代人工晶状体(intraocular lens,IOL)屈光力计算公式[Barrett Universal Ⅱ(BUⅡ)、Emmetropia Verifying Optical(EVO)、Hill-Radial Basis Function (Hill-RBF)、Kane、Ladas Super Formula(LSF)、T2]和传统公式(Haigis、Hoffer Q、Holladay 1、SRK/T)的准确性。方法：纳入2022年1—6月于温州医科大学附属眼视光医院接受白内障手术患者。收集患者的年龄、性别、眼轴(axial length,AL)、平均角膜曲率(mean keratometry,Kmean)、前房深度、IOL常数和屈光力，术后医学验光结果。对上述10种公式进行准确性分析，包括平均预测误差(mean prediction error,ME)及其标准差、平均绝对预测误差(mean absolute prediction error,MAE)、绝对预测误差中位数(median absolute prediction error,MedAE)、绝对预测误差最大值(maximum absolute prediction error,MaxAE)、预测误差落在±0.25、±0.5、±0.75、±1.00 D范围内的百分比(%±0.25 D、%±0.50 D、%±0.75 D、%±1.00 D)。结果：共纳入506例(506眼)。Kane的MAE最低(0.411)。Hill-RBF的%±0.25 D最高(40.91%)，EVO的%±0.50 D或%±0.75 D最高(分别为69.37%、86.17%)，BUⅡ和Hill-RBF的%±1.00 D最高(均为94.07%)。总体上各种公式间，MAE、%±0.50 D、%±0.75 D、%±1.00 D比较差异存在统计学意义(P<0.05)，但两两比较仅发现%±0.75 D中，EVO(86.17%)、Hill-RBF(85.97%)、Kane(85.57%)与HofferQ(81.42%)比较差异存在统计学意义(均P<0.05)。AL亚组中，长AL组的EVO(0.390)、Hill-RBF(0.388)、T2(0.423)、Kane(0.393)四种公式的MAE与Hoffer Q(0.681)、Holladay 1(0.654)比较差异存在统计学意义(均P<0.05)，EVO(74.47%)的%±0.50 D与Hoffer Q(46.81%)比较差异存在统计学意义(P=0.017)。结论：新一代IOL屈光力计算公式在IOL屈光力计算上均具有较好的准确性，但对于不同的眼轴长度与角膜曲率值的眼球，需要选择适合的计算公式，以进一步提高预测准确性。

Objective: This study aimed to compare the accuracy of six new generation intraocular lenses (IOL) refractive power calculation formulas (Barrett Universal Ⅱ [BU Ⅱ ], Emmetropia Verifying Optical [EVO], Hill-Radial Basis Function [Hill-RBF], Kane, Ladas Super Formula [LSF], T2) and traditional formulas (Haigis, Hoffer Q, Holladay 1, SRK/ T). Methods: The patients who received cataract surgery in the Eye Hospital of Wenzhou Medical University from January 2022 to June 2022 were included in this study. Age, gender, axial length (AL), mean keratometry, anterior chamber depth, IOL constant and power, and postoperative refraction results were collected. The prediction accuracy of these ten IOL power calculation formulas was analyzed, including mean prediction error (ME) and its standard deviation, mean absolute prediction error (MAE), median absolute prediction error (MedAE), maximum absolute prediction error (MaxAE), the percentage of eyes of PE within the range of ±0.25 D, ±0.5 D, ±0.75 D, ±1.0 D (%±0.25 D,%±0.50 D, %±0.75 D, %±1.00 D). Results: 506 eyes of 506 patients were included. Kane has the lowest MAE (0.411).%±0.25 D of Hill-RBF was the highest (40.91%), %±0.50 D or %±0.75 D of EVO was the highest (69.37%, 86.17%), and %±1.00 D of BU Ⅱ and Hill-RBF was the highest (94.07%). There are significant differences in MAE, %±0.50 D, %±0.75 D, and %±1.00 D among all formulas (P<0.05). Still, pairwise comparison only found differences between EVO (86.17%), Hill-RBF (85.97%), Kane (85.57%), and Hoffer Q (81.42%) in %±0.75 D (all P<0.05). In AL subgroup, the MAE of EVO (0.390), Hill-RBF (0.388), T2 (0.423) and Kane (0.393) in long AL group was different from that of Hoffer Q (0.681) and Holladay 1 (0.654) (all P<0.05), the difference of %±0.50D of EVO (74.47%) compared with Hoffer Q (46.81%) (P=0.017). Conclusion: The new generation of IOL power calculation formulas have good accuracy in IOL power prediction, but for eyes with different axial lengths and keratometry, it is necessary to optimize the selection of formulas to improve the prediction accuracy further.

先天性晶状体不全脱位是一种较为罕见的晶状体悬韧带异常的疾病，其手术治疗极具挑战性。以人工晶状体悬吊为代表的传统手术方式易出现囊袋破裂、玻璃体疝、人工晶状体脱位和继发性青光眼等严重并发症。近年来，以重建囊袋悬韧带隔为目标，新型囊袋辅助装置的应用极大程度提高了先天性晶状体不全脱位的手术成功率。然而，以改良式张力环为代表的囊袋辅助装置在我国仍难以得到普及且操作繁琐。因此，如何最大程度利用普通张力环等最常见的装备，设计出一种安全可靠手治疗先天性晶状体不全脱位的手术方式是眼科界亟待解决的问题。本文将介绍一种二期张力环缝合固定治疗先天性晶状体不全脱位手术技术。该技术仅需使用普通张力环，具有操作简单安全、术后效果稳定和易于技术推广的优点。

Congenital ectopia lentis is a relatively rare zonular disorder of the lens, and its surgical treatment is extremely challenging. The traditional surgical procedures represented by intraocular lens suspension are prone to result in serious complications such as capsular bag rupture, vitreous hernia, intraocular lens dislocation and secondary glaucoma. In recent years, with the goal of reconstructing the capsular bag–zonules diaphragm, the application of new capsular bag-assisted devices has greatly improved the surgical success rate of congenital ectopia lentis. However, the capsular-assisted devices, such as modified capsular tension ring, are still difficult to be popularized in China and the surgical procedures are complicated. Therefore, how to maximize the use of common equipment such as normal capsular tension rings and design a safe and reliable surgical method for the treatment of congenital ectopia lentis is an urgent issue for ophthalmologists. This article aims to introduce a two-stage capsular tension ring fixation for the treatment of congenital ectopia lentis, which has many advantages such as simple and safe operation, stable postoperative effect and less requirements for special equipment, and is worth promoting in clinical practice.

目的：探讨人工晶状体(IOL)预先巩膜悬吊在严重晶状体半脱位中的应用效果。方法：选取 2018年12月至2022年7月四川省人民医院收治的>180°的严重晶状体半脱位患者8例(8 眼)。术中避开脱位的晶状体，预先将IOL悬吊于玻璃体腔，再将晶状体托起置于IOL上方，必要时辅助以虹膜拉钩，稳定晶状体，确保超声乳化手术安全完成。结果：严重的晶状体半脱位患者8例，其中晶状体核N1-N3硬度的患者各1例，单独使用IOL预先巩膜悬吊于术中稳定脱位的晶状体，3例超声乳化手术均顺利完成；达N4患者3例、N5患者2例，其中4例在虹膜拉钩的辅助下安全完成超声乳化；有1例N5的患者，由于悬韧带损伤超过270°，在将晶状体托起放置于IOL之上时，坠入玻璃体腔，给予玻璃体腔超声粉碎处理。8例患者术后IOL均居中，视力有不同程度的提高，眼压正常，未见严重并发症。结论：在严重晶状体半脱位的超声乳化手术中，对于N2~N3的软核，IOL预先巩膜悬吊可以良好地稳定晶状体，确保超声乳化手术的顺利进行；对于N4~N5的硬核，IOL预先巩膜悬吊可以作为一种辅助方法，联合虹膜拉钩共同稳定晶状体，确保超声乳化手术的安全进行。

Objective: To investigate the effect of intraocular lens (IOL) pre-suspension in thetreatment of severe lens subluxation. Methods: Retrospective case study. From December 2018 to July 2022, 8 eyes of 8 patients with severe lens subluxation greater than 180 degrees admitted to our hospital were selected. During surgery, the IOL should avoid the subluxated lens and be pre-suspended in the vitreous cavity, and then the lens is lifted and placed above the IOL. If necessary, the iris hook can be used to stabilize the lens to ensure the safe completion of phacoemulsification. Results: There were 8 patients with severe subluxation of lens. Among them, the hardness of 3 patients' lens nucleus ranged from N1 to N3. In these 3 patients, we used the IOL pre-suspension alone to stabilize the subluxated lens, and phacoemulsification in these 3 patients was successfully completed. Three patients had N4 and 2 patients had N5, of which 4 patients underwent phacoemulsification safely with the assistance of iris hook. In another patient with N5, the lens fell into the vitreous cavity during surgery (the suspension ligament rapture greater than 270 degrees) when it was lifted and placed on the IOL which was crushed by the vitreous cavity ultrasound. After surgery, the IOL was centered in all 8 patients, visual acuity was improved to varying degrees, intraocular pressure was normal, and no serious complications were observed. Conclusions: In severe lens subluxation surgery, IOL presuspension in soft nuclei of N2 to N3 can stabilize the lens well and ensure the safety of phacoemulsification. For hard nuclei N4 to N5, IOL presuspension can be used as an auxiliary method in combination with iris hook to stabilize the lens and ensure the safety of phacoemulsification.

目的：探讨运用Barrett Universal Ⅱ公式(BUⅡ公式)计算人工晶状体(intraocular lens,IOL)屈光力时，可选参数角膜横径，又称白到白(white-to-white,W T W)与晶状体厚度(lens thickness,LT)的实际应用价值。方法：采用单中心、前瞻性临床研究，连续纳入同一术者顺利进行白内障超声乳化吸除术联合MX60(IOL植入术患眼279眼，术前使用OA-2000非接触式光学生物测量仪测量眼部数据并计算IOL植入度数，代入B UⅡ公式保留或去掉可选参数WTW、LT计算预测结果，进一步根据患者眼轴长度(axial length,AL)分亚组分析。主要结局指标：随访患者至术后1个月以上，比较使用和未使用WTW和LT两个参数、BUⅡ公式预测误差(prediction error,PE)、绝对预测误差(absolute error,AE)、AE小于0.5 D所占比例。结果：总体1上，忽略W T W + LT，PE为-0.05 D(-0.26, 0.18)(P=0.011)，其他参数组合的PE与0比较差异无统计学意义(P>0.05)。各参数组合的AE比较差异无统计学意义(0.22~0.23 D，P= 0.404)。同时忽略WTW + LT时AE出现最大值(+1.5 D)。应用WTW + LT、忽略WTW + LT、忽略WTW和忽略LT时纳入患者AE ≤ 0.50 D的比例分别为80.65%、79.57%、80.65%和81.36%。在各眼轴亚组中，忽略LT时，AE ≤ 0.50 D的百分比在短眼轴亚组(80.00% vs.66.67%~73.33%)与长眼轴亚组(77.78% vs. 73.33%~75.56%)中较高。在中等眼轴亚组中，AE ≤ 0.50 D百分比代入全部参数时略高(83.11% vs. 80.82%~82.19%)，忽略WTW + LT计算时稍低(80.82%)。结论：使用BU Ⅱ计算IOL屈光力时，可选参数WTW和LT无论是否代入公式中，皆可得到相近的平均预测水平；但是，同时忽略WTW和LT可能出现较大预测误差。对于22 mm ≤ AL<26 mm眼，推荐代入全部参数计算；当AL≤ 22 mm或AL ≥ 26 mm，仅输入WTW的计算方法累积精确度更高，可优先采用。

Objective: To investigate the practical application value of the optional parameters of corneal horizontal diameter or white to white (WTW) and lens thickness (LT) a using Barrett Universal II formula. Methods: Single-center, prospective clinical study. Eligible 279 eyes who underwent uneventful phacoemulsification and enVista MX60 implantation by the same surgeon were consecutively enrolled. OA-2000 (Tomey, Japan) non-contact optical biometry was used to measure the ocular data and calculate the IOL implantation power preoperatively. The BU II network formula was used to retain or remove optional parameters WTW and LT, and the predicted results were calculated. Further subgroup analysis was conducted based on the patient's axial length. Main outcome measures: Follow up patients for more than 1 month after surgery, compare the proportion of using and not using WTW and LT parameters, BU II formula prediction error (PE), absolute prediction error (AE), and AE less than 0.5 D. Results: Overall, ignoring WTW + LT, the median PE was -0.05 D (-0.26, 0.18) (P = 0.011) , and there is no statistically significant difference in PE compared 0 for the other parameter combinations (P > 0.05). There was no significant difference in the median AE of each parameter combination (0.22~0.23 D, P = 0.404). While ignoring both WTW and LT, the maximum AE value (+1.5 D) was found. The proportion of patients with AE ≤ 0.50 D included in the application of WTW+LT, neglect of WTW+LT, neglect of WTW, and neglect of LT were 80.65%, 79.57%, 80.65%, and 81.36%, respectively in each axial subgroup, when LT was ignored, the percentage of AE ≤ 0.50 D was higher in the short axial subgroup (80% vs. 66.67%~73.33%) and the long axial subgroup (77.78% vs. 73.33%~75.56%). In the subgroup of moderate eye axis, the percentage of AE ≤ 0.50 D was slightly higher when all parameters were substituted (83.11% vs. 80.82%~82.19%), and slightly lower when WTW+LT calculation was ignored (80.82%). Conclusions: When applying Barrett Universal II to calculate the refractive power of artificial lenses, the optional parameters WTW and LT can obtain similar average prediction levels regardless of whether they are substituted into the formula; However, ignoring both WTW and LT may result in significant prediction errors. For eyes with a diameter of 22 mm ≤ AL<26 mm, it is recommended to use all parameters for calculation; When AL ≤ 22 mm or AL ≥ 26 mm, the calculation method that only inputs WTW has higher cumulative accuracy, and it is suggested to be prioritized.

YAMANE式后房型人工晶状体巩膜层间固定术是近年出现的一种人工晶状体悬吊术式。该文介绍了笔者结合实际条件对其改良后的手术步骤，手术关键点及使用经验。在缺乏足够囊膜支撑的条件下，此手术方式微创、安全、有效，术后恢复快。在随访期间(最长5年)，视力稳定，未出现人工晶状体脱位、移位、倾斜，人工晶状体夹持及人工晶状体襻暴露等并发症，值得临床推广应用。

The YAMANE intrascleral fixation of posterior chamber intraocular lens (IOL) is a new technique in recent five years for IOL suspension. This article introduces a modified YAMANE technique including surgical procedure, key points and using experience. In the absence of adequate capsular support, this procedure is minimally invasive, safe, effective and has a fast postoperative recovery. During the follow-up period (up to 5 years), the visual acuity was stable, and there were no complications such as luxation of lens, displacement, tilt of intraocular lens, intraocular lens clamping and IOL haptic exposure.

该文报道一例激光原位角膜磨镶(laser-assisted in situ keratectomy,LASIK)术后行白内障超声乳化摘除联合多焦点散光矫正型人工晶状体植入术的病例。该患者为42岁女性患者，20年前外院行双眼LASIK手术，现因右眼视物模糊1年就诊。术前IOLMaster检查患者右眼眼轴长度29.66 mm，前房深度3.18 mm，晶状体厚度4.75 mm，白到白距离11.6 mm，前表面及全角膜散光分别为1.01 D@67 °及0.91 D@56 °。Pentacam角膜地形图15 °范围模拟角膜屈光力得到的角膜散光为1.2 D@58.1 °，为规则领结型。患者眼底检查未见明显异常，因其脱镜意愿强烈，植入双焦点散光矫正型IOL(德国Zeiss公司AT LISA toric 909M)。根据Barrett True-K Toric公式测量的后表面散光计算结果进行手术规划，选择+17 D球镜1.5 D柱镜Zeiss 909M IOL，植入轴位55 °。术后1个月患者裸眼远视力0.8，35 cm裸眼近视力1.0，最佳矫正远视力–0.25 DS/–0.5 DC×120 °至1.0，患者满意。提示经过详细的术前评估及规划，并与患者充分沟通，多焦点散光矫正型人工晶状体可以在部分适合的LASIK术后患者中取得良好效果。

It is reported a case of cataract phacoemulsification combined with toric multifocal intraocular lens (IOL) implantation after LASIK surgery in this article. A 42 year-old female patient who underwent bilateral LASIK surgery in other hospital 20 years ago. She visited our hospital due to blurred vision in her right eye for one year. The preoperative IOL Master examination results showed an axial length of 29.66 mm, anterior chamber depth of 3.18 mm, lens thickness of 4.75 mm, white to white distance of 11.6 mm, and anterior surface and total corneal astigmatism of 1.01 D @ 67 ° and 0.91 D @ 56 °, respectively in right eye. The corneal astigmatism measured by Pentacam using 15°range simulated keratometry is 1.2 D@ 58.1 °, which is a regular bow tie shape.No obvious abnormalities was found in the patient's fundus examination. Due to her strong desire to get rid of the glassesa toric bifocal IOL (AT LISA Toric 909M, Zeiss, Germany) was implanted.Based onthe IOL power calculation results of Barrett True-K Toric formula with measured posterior corneal astigmatism, an IOL with Sph 17.0 D/Cyl1.5 D/A 55°was chosen. One month after surgery, the patient's uncorrected distance visual acuity was 20/25, 35 cm uncorrected near visual acuity was 20/20, and the best corrected distance visual acuity was 20/20 with a prescription of –0.25 DS/–0.5 DC × 120 °. The patient was satisfied with the outcome. After detailed preoperative evaluation and design, and sufficient communication with patients, toric multifocal IOL implantation can achieve good results in some apropriated for the patients after LASIK surgery.

球形晶状体是一种罕见的先天性晶状体悬韧带疾病，表现为晶状体前后径增加，赤道半径减小，类似球形。临床特点包括浅前房、晶状体源性高度近视、晶状体脱位及继发青光眼等。治疗上早期可以通过验光配镜提高视力，当继发晶状体脱位及青光眼时需尽早进行手术治疗。本例报道一例72岁男性患者，因右眼视力下降2年入院。既往近视，近视逐渐加深，近2年患者双眼配镜-10D，视力无明显改善。就诊后考虑球形晶状体所致晶状体不全脱位合并白内障，入院后行囊袋拉钩固定下白内障超声乳化+人工晶状体悬吊+前段玻璃体切除术。患者术后1个月后复诊，发现黄斑水肿，予以复方平地木颗粒口服，溴芬酸钠滴眼液滴眼。2周后复诊视力及黄斑水肿明显好转。

Microspherophakia (MSP) is a rare congenital zonular dysplasia characterized by increased anteroposterior lens thickness and reduced equatorial diameter, resembling a spherical shape. The related ocular manifestations of MSP include shallow anterior chamber, lens derived high myopia, ectopia lentis and secondary glaucoma. In the early stage of MSP, vision acuity may be improved by glasses. Cataract surgery is necessary once secondary lens dislocation and glaucoma occur. A 72-year-old male hospitalized patient was reported who complained increased blurred vision of his right eye for 2 years. In the past 2 years, the power of his binocular glasses was increased to -10 diopters without significant improvement in visual acuity. Lens dislocation and phakic insufficiency caused by MSP was diagnosed after he attending clinics at the Eye and ENT Hospital of Fudan University, Shanghai, China. Phacoemulsification with scleral sutured intraocular lens (IOL) implantation surgery and anterior vitrectomy were performed. One month after operation, macular edema was found at first follow-up. Compound pingdingmu granule was taken orally and Bromfenac sodium eye drops were applied three times a day. Two weeks later, visual acuity of his right eye was improved significantly and macular edema was eliminated dramatically.

玻璃体视网膜疾病并发白内障患者行玻璃体切割术联合超声乳化白内障摘除术，即前后节联合手术，是高效的手术方式，而后囊膜破裂(posterior capsular rupture,PCR)是超声乳化白内障摘除术的术中并发症之一，能够及时、有效地处理PCR，稳定、安全地植入人工晶状体(intraocular lens,IOL)，对于顺利完成后段手术，减少术后并发症十分重要。本文将对前后段联合手术中后囊膜破裂的术中处理、以及IOL光学部夹持固定法植入IOL的手术技术要点进行总结。

Combined surgery of pars plana vitrectomy (PPV) and phacoemulsification is an effective and safe way for management of retinal diseases complicated with cataract. Posterior capsular rupture (PCR) is one of the common intraoperative complications of phacoemulsification, and it is thus very important to deal with it promptly and efficiently, and ensure the subsequent procedures of intraocular lens (IOL) implantation as well as PPV. We will summarize the key points of the surgical technique for management of PCR and capture of IOL optic during combined surgery.

目的：比较Alcon Acrysof IQ PanOptix TFNT00 (PanOptix)晶状体常数优化前后对人工晶状体(intraocular lens,IOL)度数计算准确性的影响，以及不同眼轴长度晶状体常数优化的效果。方法：回顾性收集2021年6月—2022年3月在上海爱尔眼科医院行白内障超声乳化手术联合植入PanOptix IOL患者的术前眼球生物学测量参数、植入IOL度数和术后1~3个月的显然验光结果。联合SRK/T、Hoffer Q、Holladay 1、Haigis公式，通过回归法计算优化的晶状体常数A、pACD、SF，通过多元线性回归计算优化的晶状体常数a0、a1和a2。观察晶状体常数优化前后平均绝对预测误差值(mean absolute error,MAE)及中位绝对预测误差值(median absolute error,MedAE)，预测误差在±0.25、±0.50、±0.75、±1.00 D以内的百分比的差异，评价晶状体常数优化对IOL计算准确性的影响。随后，按照眼轴长度进行分组(非高度近视组：<26.00 mm; 高度近视组：≥26.00 mm)，比较非高度近视组和高度近视组优化晶状体常数的差异。结果：共92眼(54位患者)纳入研究。优化前的晶状体常数A、pACD、SF、a0、a1和a2分别为119.1、5.63、1.83、1.39、0.40和0.10；优化后分别为119.35、6.14、2.36、?3.42，0.12和0.34。在全部眼轴组，晶状体常数优化前，SRK/T、Hoffer Q、Holladay 1、Haigis公式的MAE值分别为0.44、0.50、0.54、0.46 D；优化后，MAE值分别为0.43、0.54、0.51、0.35 D，其中Haigis公式优化前后比较差异有统计学意义(P=0.001)。在非高度近视组，晶状体常数优化前，4条公式的MAE值分别为0.46、0.40、0.40、0.42 D；优化后，MAE值分别为0.46 D、0.38 D、0.39 D、0.38 D，比较差异均无统计学意义(均P>0.05)。在高度近视组，晶状体常数优化前，4条公式的MAE值分别为0.42、0.59、0.66、0.50 D；优化后，MAE值分别为0.36、0.48、0.47、0.31 D，其中Holladay 1和Haigis公式优化前后比较差异有统计学意义(P 分别为 0.020、0.002)。结论：PanOptix IOL的晶状体常数优化可以提高IOL度数计算的准确性，在高度近视组中比非高度近视组中优化意义更大。

Objective: To assess the benefits of intraocular lens (IOL) constant optimization of Alcon Acrysof IQ PanOptix TFNT00 (PanOptix) on the accuracy of IOL power calculation, and the effects of constant optimization between different axial length (AL) groups were further compared. Methods: Patients who underwent phacoemulsification and implantation with PanOptix IOL between June, 2021 and March, 2022 were included in this retrospective study. The preoperative biological ocular parameters, implanted IOL power, and subjective 1-3 months postoperative refraction were collected. Combined with SRK/T, Hoffer Q, Holladay 1 and Haigis formulas, the optimized IOL constant A, surgeon factor (SF), post-surgery anterior chamber depth (pACD), and a0, a1, a2 were back-calculated. Refractive outcomes using optimized IOL constants were re-calculated combined with the corresponding formulas. Compare the mean absolute error (MAE), medium absolute error (MedAE) and percentage of eyes with IOL prediction errors (PE) within ±0.25, ±0.50, ±0.75 and ±1.00 (diopter)D when using the optimized constants and the manufacture constants. Patients were divided into two groups according to AL (non-high myopia: <26.0 mm; high myopia: ≥26 mm), compare the difference of IOL constant optimization between AL subgroups. Results: A total of 92 eyes of 54 patients were enrolled. The manufacture lens constant of A, pACD, SF, a0, a1 and a2 are respectively 119.1, 5.63, 1.83, 1.39, 0.4 and 0.1; and the optimized values are respectively 119.35, 6.14, 2.36, ?3.42, 0.12 and 0.34. In all patients group, with manufacture lens constant, the MAE values of SRKT, Hoffer Q, Holladay 1 and Haigis formula are 0.44, 0.50, 0.54, 0.46 D; with optimized lens constants, the MAE values are 0.43, 0.54, 0.51, 0.35 D, and there is a statistical difference of Haigis formula after optimization (P=0.001). In non-high myopia group, with manufacture lens constant, the MAE values are 0.46, 0.40, 0.40, 0.42 D; with optimized lens constants, the MAE values are0.46, 0.38, 0.39, 0.38 D, and no statistical difference has been found(P>0.05). In high myopia group, with manufacture lens constant, the MAE values are 0.42, 0.59, 0.66, 0.50 D; with optimized lens constants, the MAE values are 0.36, 0.48, 0.47, 0.31 D, and there are statistical differences of Holladay 1 and Haigis formula after optimization (P = 0.020, 0.002). Conclusion: IOL constant optimization of PanOptix IOL can improve the accuracy of IOL calculation, which is more significant in the high myopia group.