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1·CRVO group had longer history and less visual improvement after surgery.

CRVO组病史较长，手术后视力改善较少。

2·Objective to observe the clinical therapeutic effects of radial optic neurotomy (RON) for central retinal vein occlusion (CRVO).

目的观察放射状视神经切开术(RON)治疗视网膜中央静脉阻塞(CRVO)的临床疗效。

3·Objective To study changes in hemodynamics and hemorheology of central retinal artery (CRA) and optic artery (OA) in patients with central retinal vein occlusion (CRVO).

目的探讨视网膜中央静脉阻塞(CRVO)患者的视网膜中央动脉(CRA)，眼动脉(OA)的血液动力学、血液流变学改变及其相互关系。