目的: 用 光学相干断层扫描（optical coherence tomography ，OCT) 对糖尿病黄斑水肿玻璃体手术前、后.评价。
方法: 13只眼糖尿病黄斑水肿有玻璃体牵拉，实施玻璃体手术，术前、后OCT检查。
结果: 平均随访手术后7.5月。视网膜厚度从术前661 ± 181 m 到术后6个月以后210 ± 32 m 。视力改善，术前〈 0.1 5只眼，0.1~0.2 7只眼，0.3 1只眼。
术后0.1 2只眼，0.1~0.2 9只眼，0. 3~0.4 2只眼。视物变形改善9只眼。
结论: Vitrectomy was beneficial in eyes with diffuse DME combined with vitreomacular traction but not in eyes without traction. Optical coherence tomography allowed diagnosis of subtle vitreomacular traction and provided precise preoperative and postoperative assessments of macular thickness.