From Kook Science
Aurospecs was a trade-name for frames (or goggles) that featured Kilner screens as their lenses, first offered by Harry Boddington and the London Psychic Educational Centre in the 1930s. According to the advertising copy, the lenses were not coloured glass nor gelatine, but "optically perfect glasses cemented together, enclosing a specially compounded solution of alcoholised dicyanine," thus having a limited life-span, as the chemical dyes would evaporate and lose colour over time.
- Boddington, Harry (1931), Gow, David, ed., Aura. Kilner Screens. (Aurospecs) and All About Them: Practical, Explanatory, Evidential, London: London Psychic Education Center, https://archive.org/details/aurakilnerscreen00bodd