目的：探究联合气液交换下玻璃体切除术对眼后段非磁性异物治疗效果及术后BCVA的影响。

方法：选取84例86眼患者作为本次研究对象，分为观察组和对照组，各42例43眼。对照组单纯采用玻璃体切除术，观察组采用气液交换联合玻璃体切除术治疗。比较两组手术时间、异物清除率、视网膜复位率、BCVA、黄斑中心视网膜厚度、并发症等。

结果：观察组手术时间、并发症发生率低于对照组，异物清除率、视网膜复位率高于对照组(P<0.05)。观察组患者各时间点BCVA、黄斑中心视网膜厚度均低于对照组(P<0.05)。

结论：气液交换联合玻璃体切除术治疗眼后段非磁性异物效果良好，能够提高患者术后视力水平，改善视网膜水肿，降低手术并发症。

METHODS: Totally 84 patients(86 eyes)were enrolled in this study. They were divided into observation group and control group, each group with 42 cases(43 eyes). The control group was treated with vitrectomy alone, and the observation group was treated with gas-liquid exchange combined with vitrectomy. The operation time, foreign body clearance rate, retinal recovery rate, BCVA level, macular central retinal thickness, and complications were compared between two groups.

RESULTS: The operation time and complication rate of the observation group were lower than those of the control group. The rate of foreign body clearance and retinal reattachment was higher than that of the control group(P<0.05). The BCVA and macular center retinal thickness were lower in the observation group than in the control group at each time point(P<0.05).

CONCLUSION:Gas-liquid exchange combined with vitrectomy for the treatment of non-magnetic foreign bodies in the posterior segment of the eye is effective, which can improve the postoperative visual acuity, the retinal edema and reduce surgical complications.