What does "spectacled" mean?

Spectacled: (Zoöl.) Having the eyes surrounded by color markings, or patches of naked skin, resembling spectacles. Spectacled bear (Zoöl.), a South American bear (Tremarclos ornatus) which inhabits the high mountains of Chili and Peru. It has a light-colored ring around each eye. -- Spectacled coot, or Spectacled duck (Zoöl.), the surf scoter, or surf duck. [Local, U.S.] -- Spectacled eider (Zoöl.) See Eider. -- Spectacled goose (Zoöl.), the gannet. -- Spectacled snake (Zoöl.), the cobra de capello.