Pars plana vitrectomy (PPV) is one of the most widely used surgical therapies to proliferative diabetic retinopathy in the world. However, as a predictable consequence of PPV surgery, postoperative cataract is observed in 79%-95% of phakic diabetes retinopathy patients after PPV in 6-24 months and a subsequent cataract surgery is usually required. While, the subsequent cataract surgeries not only bring additional economy and workload burden, but also increase the surgical risks. Since the two-step surgical approach has its defects, the combination of PPV and phacoemulsification is an ideal surgical option. This study is a multi-center prospective study, aimed to evaluate the effect of PPV combined with phacoemulsification cataract surgery in phakic diabetes retinopathy patients, and make a comparation between the combined surgery and the two-step surgery in patients without severe lens opacities.
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Best correct visual acuity (BCVA)
Timeframe: Change from Baseline at 1 week after the surgery(s)
Best correct visual acuity
Timeframe: Change from Baseline at 1 month after the surgery(s)
Best correct visual acuity
Timeframe: Change from Baseline at 3 months after the surgery(s)
Best correct visual acuity
Timeframe: Change from Baseline at 6 months after the surgery(s)