Eye-catching, a China idiom, pinyin is Hu ǒ y ǒ n j huǒ yǎn jīn jīng: n j: ng, which means the Monkey King's eyes that can identify monsters in Journey to the West; Later, it was used to describe people's sharp eyes and strong ability to distinguish truth from falsehood. From Yuan Yang Jingxian's The Journey to the West Zaju
Critical eye is not a patent of the Monkey King. The earliest owner of critical eye is Wang Lingguan.
According to the Biography of Immortals in Ming and Qing Dynasties, Wang Lingguan, formerly known as Wang Xie, was the temple god of the floating beam in Xiangyin. Because he ate the boys and girls alive, he was a disciple of the thirtieth generation, flying and burning in Xihe, burning the evil king into a golden eye.
The Monkey King got an eye disease in the accident of 7749 days in the Eight Diagrams Furnace of Taishang Laojun. He is afraid of smoke and fire. Without magic, he can't see through this monster. The reason why he can see the auspicious clouds and evil spirits on Tang Priest's head depends on the Monkey King's own way, which Tang Priest, Bajie and Friar Sand can't do. Therefore, Wukong can often see at a glance whether he is a monster, a fairy or an ordinary person standing in front of him. Only once did I miss my eyes, and that was when Niu Wangmo turned into a pig and cheated the banana fan away. Later, Wukong himself admitted that the reason for his failure was that he didn't plan ahead after his success and didn't notice the clouds, so he took the road of Niu Wangmo.