The Retinex Theory shows how colors are interpreted differently depending on surrounding colors. Wait, what? Theorized by Polaroid founder Edwin Land in the 1970s, this color conundrum makes your eyes and brain begin to groove in some seriously strange ways. Introducing Polaroid I-Type Retinex Edition Film, where color becomes a mind-melting creative force. Out now in reality. The 10 unique circular frames are perfect canvases to bring the interplay to life as colors change based on surrounding colors. A true celebration of Polaroid's legacy and heritage, these limited special edition frames let you collect a piece of Polaroid's history. Polaroid Round Frame Retinex Edition Instant Color Film for I-Type cameras contains two packs of 8 count film for a total of 16 photos. I-Type film is only compatible with Polaroid I-Type cameras and printers.