One report tells of a totally blind boy who could ride his tricycle at good speed round the block near his home, using facial vision.
有一则报道讲述了一个完全失明的男孩，可以用面部视觉围绕他家附近的楼栋快速骑三轮车。
The totally blind group did not suffer from what's called photophobia.
光线并未使全盲组感到困扰，却加重了法定失明组的偏头痛。
One group was totally blind. The other group was legally blind but could still make out light and dark.
研究人员拿两组盲人偏头痛者作对比，一组完全失明，另一组法定失明，但还分辨得出光和暗。
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