Hi -
Excerpt -- link below.
"The Nazar Boncuk charm (or Evil Eye Bead) is an "eye", often set on a
blue background. It stares back at the world to ward off evil eye and
keep you safe from harm."
https://www.evileyestore.com/evil-eye-meaning.html
"The evil eye amulet has been worn in public by
celebrities such as as Cameron Diaz, Kelly Ripa, Brad Pitt, Kim Kardashian, Lindsay Lohan,
Lauren Conrad, and Rhianna. Clearly, this iconic and stylish image has only
increased in popularity."
https://www.jewishgiftplace.com/What-is-the-Evil-Eye.html