Sanpaku

https://www.imdb.com/name/nm0004886/mediaviewer/rm642102016/

WHAT IS SANPAKU?
Literally translated, sanpaku means "three whites," which refers to how you can divide up an eye into pieces, with the whites taking up three of the four segments. Sanpaku is when you can see the white of somebody's eye either above or below the iris.
Normally, that's a pretty unremarkable thing that you might not even be able to pick up on. But according to one Japanese superstition, sanpaku might be a good indicator of your fate.

This superstition really took off in the west during the 60s when Japanese author George Osawa began predicting the deaths of famous American figures (Marilyn Monroe, JFK) based on their eyes. Since then, people have speculated about the connection between sanpaku and one's fate.