There are a number of identifying white markings on a horse's face and they are so common they have their own names.
White markings, Pinto, Roan, Leopard Complex And White Horses
/storage/2021/11/IMG_
i.static.com/8898499/r/il/67e5ea/2388495914/il
Science vs Folklore: Do Whorl Patterns in Horses Really Mean
What's in a Swirl?
static01.nyt.com/images/2014/05/24/sports/24socks/
horse: face markings -- Kids Encyclopedia
Close-up photograph of a deaf horse with typical eye and facial
21 Common Horse Colors, Markings, & Patterns With Pictures
Intro to Face Markings
What are some of the most common facial markings for horses? - Quora
What's a Whorl? - Teddie Ziegler Horsemanship
Know Your Horse Markings