Argus

In Greek mythology, Argus was a giant with a hundred eyes. He was known for his great eyesight, as some of his eyes were always open and guarded. He was commissioned by Hera, the wife of Zeus, to guard Io, Zeus's lover who had been transformed into a cow. Eventually, Hermes killed Argus on Zeus' orders. Due to his hundred eyes, Argus has become a symbol of vigilance, constant vigilance, and accuracy.