The Brain from Planet Arous

The Brain from Planet Arous is a 1957 American sciencefiction film that features the theme of alien possession.

Meanwhile, another brain from Arous named Vol arrives on Earth and eventually inhabits the body of Marchs fiancees dog. Vol explains that Gor is a wanted criminal on their world. Gors only weakness is the Fissure of Rolando and he is only vulnerable during one brief period when he needs to exit his host to absorb oxygen.The effect on Agars eyes was achieved using special contact lenses lined with metal foil. This effect was later used on actor Gary Lockwood for the second Star Trek pilot episode Where No Man Has Gone Before. ........

Source: Wikipedia