And, her agent said, she was the voice in the ubiquitous recording that advised telephone callers in the 1980s and ’90s that “the number you have reached is no longer in service.”

Her daughter, Melissa Grant, confirmed Ms. Gordon’s death, in Manhattan.

Ms. Gordon was credited with blazing other trails professionally. According to the Screen Actors Guild, she broke ground in 1966 as the first woman to head a local unit of the union when she was elected president of the New York branch in 1966. She was the first woman to serve as an announcer on a network TV broadcast of a national political convention, in 1980 on ABC, and the first to do on-air promotions for a network, plugging news and sports programs on NBC for four decades.

“Her stature as a pitchwoman and voice-over talent was indispensable in convincing the advertising industry to take seriously the concerns of commercial performers in the early days of that contract,” said Gabrielle Carteris, the president of the Screen Actors Guild-American Federation of Television and Radio Artists.

Ms. Gordon pitched many household goods and personal products on television, but, as one interviewer wrote, she “has probably done more for the eyesight of the American woman than all the professionals and their lectures.”

Her glasses were not a prop.

She had been squinting into the camera while rehearsing a commercial when an advertising agency representative, observing her in the studio, suggested that she wear her glasses on air. He assured her that he would persuade the sponsor to agree to what would be a radical departure from convention at a time when society still subscribed to Dorothy Parker’s acerbic aphorism “Men seldom make passes/At girls who wear glasses.”