A demonstration device for demonstrating at least one thermally-reversible characteristic of a photochromic optical article, such as an optical article having a photochromic material, having a housing defining an interior, and an inspection platform within the interior of the housing configured for supporting at least a portion of the optical article. The demonstration device further has at least one ultraviolet light source configured to radiate ultraviolet light into the interior of the housing, and at least one inspection light source configured to illuminate at least a portion of the interior of the housing. The demonstration device further has at least one heating device configured to heat at least a portion of the interior of the housing. The at least one heating device has at least one heat source and at least one fan.