“火眼金睛”，原指《西游记》（Journey to the West ）中孙悟空能识别妖魔鬼怪的眼睛。后用以形容人的眼光锐利，能够洞察一切（ take in all with one's observant eyes），可以翻译为“ piercing eye；eagle-eyed，sharp-sighted”。

例句：

孙悟空火眼金睛，妖魔鬼怪辨得清。

With his piercing eye, Monkey King was able to tell monsters from an ordinary human being at the first glance.

火眼金睛的警官发现了三株大麻。

Three cannabis plants were found by eagle-eyed police officers.