The lack of data from randomised controlled trials makes it difficult to analyse the impact of existing screening programmes on the prevalence of amblyopia.
现行对弱视的视力筛检计划，还没有被随机对照试验的临床实验证实其功效。
The lack of data from randomised controlled trials makes it difficult to analyse the impact of existing screening programmes on the prevalence of amblyopia.
现行对弱视的视力筛检计划，还没有被随机对照试验的临床实验证实其功效。
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