Why do the black glasses in the tomb robbery notes wear glasses? Can't he see?

The black glasses in the tomb robbery notes have eye diseases and poor eyesight during the day, so they wear sunglasses. The blind man's eye disease does not hinder his behavior in the battle. He can see in the dark, which makes him more agile. "Black blind man" is what people in the street call him, and Wu Xie nicknamed him "black glasses".

Use black and gold knives in the sand sea. He always wears a pair of sunglasses. According to Nanpai's uncle, his eyes should have some kind of disease, but he can see better than ordinary people in the dark.

Extended data:

Black blind man, a professional grave robber, is a character in Uncle Nan Pai's novel Grave Robbery Notes. Be good at dressing up, using knives and guns, and shooting. The real name of the black blind man is unknown. The real name has four words, and the first two should be his surname (Nanpai Sanshu revealed at the Taipei Tibetan Flower Signing Conference on September 12 that the black blind man is a flag bearer and Mongolian, and his name has four words).

Although the Han surname is Qi, not a descendant of Jiumen, it seems to have an intersection with (in an interview with Shahai Bar, his uncle replied that the blind man and Chyi Yu are both flag bearers and belong to the same family). It is one of the few Eight Banners nobles left over from the Qing Dynasty. Uncle (Wu Sansheng) employed by Snake Marsh Ghost Town is entrusted to protect desperate Wu Xie in the sand sea.