Objective: To investigate the influence of residual astigmatism on the postoperative visual acuity in cataract patients with implantation of an extended depth of focus intraocular lens (IOL). Methods: Retrospective cohort study. A total of 56 eyes of 56 cataract patients who underwent phacoemulsification combined with extended depth of focus IOL implantation from January 2019 to December 2020 at Eye & ENT Hospital of Fudan University were included. There were 29 males and 27 females in all patients, and the age was (65±9) years. Patients were divided into two groups according to their postoperative residual astigmatism: low astigmatism group (<0.75 D, 28 eyes) and high astigmatism group (0.75 to 1.50 D, 28 eyes). At 3 months after surgery, measurements were completed, including postoperative uncorrected distance (5 m) visual acuity, uncorrected intermediate (80 cm) visual acuity, uncorrected near (40 cm) visual acuity, best corrected visual acuity (all the visual acuity was converted to the logarithm of the minimum angle of resolution visual acuity), defocus curves, quick contrast sensitivity function, wavefront aberration, and VF-14 questionnaire scores. The independent samples t-test and Mann-Whitney U test were used for data analysis. Results: The low astigmatism group and high astigmatism group's uncorrected distance visual acuity [M (Q1, Q3)] were 0.05 (-0.06, 0.10), 0.08 (0.00, 0.22), their uncorrected intermediate visual acuity were 0.11 (0.00, 0.20), 0.14 (0.10, 0.21), their uncorrected near visual acuity were 0.28 (0.20, 0.32), 0.26 (0.20, 0.30), and their best corrected visual acuity were 0.17 (0.05, 0.30), 0.14 (0.04, 0.22), respectively. The differences were not statistically significant (all P>0.05). No significant difference was found in the defocus curves from +1.00 to -4.00 D, at intervals of +0.50 D, between the two groups (all P>0.05). No significant difference was found in the quick contrast sensitivity of low, middle and high frequency of dark vision between the low astigmatism group and high astigmatism group (all P>0.05), and the area under Log contrast sensitivity function of the two groups were 0.87±0.28 and 0.77±0.30 (P>0.05). The total whole-eye aberrations were 0.59±0.18 and 0.74±0.51, and the total higher-order aberrations were 0.30±0.13 and 0.37±0.25 in the two groups at 4.0-mm pupil diameter. The differences were not statistically significant when the total whole-eye aberration, total higher-order aberration, coma, cloverleaf aberration, and spherical aberration were compared (all P>0.05). The differences of the total VF-14 visual scores, near visual acuity scores and the distance visual acuity scores of the two groups were not statistically significant (all P>0.05). Conclusion: Cataract patients with residual postoperative astigmatism 0.75 to 1.50 D can obtain as good visual quality as those with postoperative residual astigmatism<0.75 D after implantation of an extended depth of focus IOL.
目的： 研究白内障患者行连续视程人工晶状体（IOL）植入术后残余散光对视觉质量的影响。 方法： 回顾性队列研究。收集2019年1月至2020年12月在复旦大学附属眼耳鼻喉科医院眼科行超声乳化白内障吸除连续视程IOL植入术的56例（56只眼）白内障患者的病历及随访资料，其中男性29例，女性27例，年龄（65±9）岁。根据患者术后残余散光度数分为低散光组（<0.75 D，28例）和高散光组（0.75~1.50 D，28例）。记录2个组患者术后3个月的裸眼远距离（5 m）、中距离（80 cm）、近距离（40 cm）视力与最佳矫正视力（最小分辨角对数视力），以及离焦曲线、快速对比敏感度、波前像差及VF-14视功能指数量表得分等数据并比较。统计学方法主要采用独立样本t检验及Mann-Whitney U检验。 结果： 低散光组与高散光组患者术后裸眼远距离视力［M（Q1，Q3）］分别为0.05（-0.06，0.10）、0.08（0.00，0.22），裸眼中距离视力分别为0.11（0.00，0.20）、0.14（0.10，0.21），裸眼近距离视力分别为0.28（0.20，0.32）、0.26（0.20，0.30），最佳矫正视力分别为0.17（0.05，0.30）、0.14（0.04，0.22），2个组间比较差异均无统计学意义（均P>0.05）。低散光组与高散光组患者术后离焦曲线显示，附加球镜度数从+1.00至-4.00 D，以0.50 D为间隔的各处视力2个组间差异均无统计学意义（均P>0.05）。低散光组与高散光组患者在暗视状态的低、中、高频下的快速对比敏感度差异均无统计学意义（均P>0.05），2个组患者的对比敏感度函数曲线下面积分别为0.87±0.28、0.77±0.30，差异亦无统计学意义（P>0.05）。2个组患者在4.0 mm瞳孔直径下的全眼总像差分别为0.59±0.18、0.74±0.51，总高阶像差分别为0.30±0.13、0.37±0.25，全眼总像差、总高阶像差、彗差、三叶草像差及球差2个组间差异均无统计学意义（均P>0.05）。2个组患者的VF-14视功能指数量表总得分、近视力得分及远视力得分差异均无统计学意义（均P>0.05）。 结论： 白内障患者行连续视程IOL植入术后残余散光度数为0.75~1.50 D与<0.75 D的视觉质量相当。.