麻雀一到夜晚,就看不清东西。有的人像麻雀一样,白天视力挺好的,活动正常自如与常人无二,一到黑暗处或夜晚就看不清东西了,走路深一脚浅一脚,为防止磕绊,常摸索前进,行动困难。所以人们将这种人比喻为“雀盲眼”,医学上称其为夜盲。 A sparrow at night, can not see things. Some people like sparrows, good eyesight during the day, the normal activities of freedom and normal, as soon as the darkness or at night can not see things, walking a little shallow foot, to prevent stumbling, often groping forward , Difficult to move. So people like to describe this kind of person as a “blind eye” and medically referred to as night blindness.