Not a great fashion item, butterfly glasses spread their wings briefly in the late 1950s, probably a result of the appearance of Maggie Stredder, "the girl with the glasses" in ITV's popular music show of the time, Oh Boy! Maggie was part of the all-girl singing group, The Vernons Girls, originally a choir put together by Vernons football pools company, reduced in size to become backing singers for BBC TV's music show Six-Five Special, and later a girl group in their own right, varying between three and five singers. It was producer Jack Good who persuaded Maggie to leave her glasses on in front of the cameras as a gimmick. It worked; she is probably the only member of the group many people remember.
Listen to The Vernons Girls singing Only You Can Do It.