他期望避免不必要的失明病例。
此项新研究中的病例是一个居住在瑞士的非洲人，在他50多岁的时候得了两次中风，隔了几个星期以后，他出现进行性失明，并且没有什么有效地治疗措施。
The man in the new study, an African living in Switzerland at the time, suffered the two strokes in his 50s, weeks apart, and was profoundly blind by any of the usual measures.
此项新研究中的病例是一个居住在瑞士的非洲人，在他50多岁的时候得了两次中风，隔了几个星期以后，他出现进行性失明，并且没有什么有效地治疗措施。
The man in the new study, an African living in Switzerland at the time, suffered the two strokes in his 50s, weeks apart, and was profoundly blind by any of the usual measures.
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