These are people who show white either above or below their irises most of the time.
They're always visually quite arresting. According to Chinese lore, people who have them are out of balance physically, and often it is a sign of extreme stress. Many killers and psychotics have it (Charles Manson is a famous example).
However, it can also be very present in extremely charismastic, visually arresting people. Among famous people in the 20th century who had it: JFK, Marilyn Monroe, Joan Crawford, James Dean, Sal Mineo, Natalie Wood.
Among famous people who have it today: Robert Pattinson, Diana Ross, Calista Gingrich, and Paul Ryan.
If a person shows white above or below the iris, then their irisies are small in porportion to their eyes.
The current beauty fad is irises that are very large in porportion to the eye, which gives someone that puppy-eyed "anime character" look. They're selling large-iris contact lenses now.
Thanks for putting a name to this. I've always found this trait quite unattractive as I favor a more almondesque exotic eye shape. Would Lady Diana fall into this category? I think they resemble the eyes of insects. Sorry.
I really don't think OP knows what he's talking about!!