A pair of sunglasses reveal skull-faced aliens living among us

Science fiction action film starring Roddy Piper, Keith David, Meg Foster.

Nada, a wanderer without meaning in his life, discovers a pair of sunglasses capable of showing the world the way it truly is. As he walks the streets of Los Angeles, Nada notices that both the media and the government are comprised of subliminal messages meant to keep the population subdued, and that most of the social elite are skull-faced aliens bent on world domination. With this shocking discovery, Nada fights to free humanity from the mind-controlling aliens.

A homeless drifter, credited only as "Nada" ("nothing") comes to Los Angeles in search of a job. While out on the street, he sees a street preacher warning that “they” have recruited the rich and powerful to control humanity. Nada finds employment at a construction site and befriends fellow construction worker Frank, who invites him to live in a shanty town soup kitchen led by a man named Gilbert.

Read more https://en.wikipedia.org/wiki/They_Live