What are pince-nez?

Answer 1

Eyeglasses popular from the late 19th through early 20th century which lacked temples and were held on the face by pinching the nose, hence the name, pinch nose (Pince Nez is French). They were made in three main styles, a C or hoop bridge, fingerpiece with a hard bridge and spring loaded nosepads, or with a sliding telescoping bridge. Franklin D. Roosevelt wore these as did Woodrow Wilson.
Pince nez are spectacles without arms, so they are worn on the nose.

Answer 2

Pince-nez are a style of eyeglasses that have no arms and are held in place by pinching the bridge of the nose. They were popular during the late 19th and early 20th centuries. Pince-nez have a classic and distinctive look.