Omega backs take their name from their uncanny resemblance to the Greek letter omega – Ω. The ends of this looped finding attach to an earring via a hinge. When closed the rounded end of the omega back holds to the ear via pressure for a non-pierced earring option. Omega backs have an open center that also allows the post of a pierced earring to pass through. This makes the Omega back a secure way to wear pierced earrings without having to fuss with a friction ear nut (also known as a friction back or clutch) – fewer parts to fiddle with or lose. These popular earring backs are an evolution of the popular earclips of the 1940s and 50s.
Carneilan Earings with Post and Omega Back Findings.