The drug Macugen treats macular degeneration, the leading cause of blindness in the elderly, with a tiny snippet of the genetic molecule RNA.

黄斑变性是老年人致盲最主要的原因，治疗该疾病的药物Macugen是一小片遗传rna分子。

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It's not clear whether any conclusions can be drawn comparing Macugen to Lucentis, he argues.

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Goddard says that even with competition from Lucentis, he sees real opportunities for Macugen.

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Aside from Macugen, Visudyne, from Novartis and QLT is available to treat AMD.

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