Our result demonstrate that the birth weight have relations with the severity of rop and cryotherapy is an effective treatment for the active stage ill retinopathy of prematurity .

早产儿的出生体重和其视网膜病变的严重程度有关且冷冻治疗可以抑制活跃性的纤维血管组识之恶化并助其吸收，对于第三期早产儿视网膜病变有治疗效果。

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Objective:To investigate the incidence and risk factors of retinopathy of prematurity (ROP) in very low birth weight infants(VLBW).

目的：探讨极低出生体重儿（ VL BW）早产儿视网膜病（ ROP）的患病率、高危因素。

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Very preterm babies are at risk of damage to their sight from ROP (retinopathy of prematurity).

非常早产的婴儿们处于 ROP（过早发育而形成的视网膜病变）造成的视力伤害之风险当中。

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