Double pupil refers to the abnormal phenomenon that two pupils overlap in an eyeball, also known as double pupil. In China's traditional culture and physiognomy, double pupil is regarded as an atavistic phenomenon or cataract, but in modern times, due to the lack of practical research materials.
The main figures recorded in the history of China have double pupils (in chronological order):
Cang Xie, the legendary historian of the Yellow Emperor, is said to be the creator of Chinese characters, with two eyes and four eyes.
Shun, one of the legendary five emperors, was named.
Jin Wengong (697-628 BC), the first of the five tyrants in the Spring and Autumn Period, was reported to have double-pupil overlapping ribs, that is, one rib overlapped.
Xiang Yu (232 BC-202 BC) was the overlord of the Western Chu State, who once took charge of China's sovereignty at the end of Qin Dynasty. Later generations often call him a "Truman disciple" in poems.
Lv Guang (338-399), the monarch of Hou Liang, had a different view from Wang Meng. Lu Guang had a pair of eyes.
Li Yu (937 -978), the last king of the Southern Tang Dynasty, was a famous poet who emphasized words. It is reported that only one eye has a heavy pupil.
Professor Wang Liqun's view of Lecture Room:
According to historical records, Xiang Yu and Shun are both binocular. Ordinary people's pupils are O-shaped, and their double pupils are ∞-shaped. He believes that this is an atavism and does not affect their eyesight.