Ever wondered how a shark sees the world, or what it's like to see like a T. rex? These unique glasses let you see the world in over 17 different ways using 22 interchangeable lenses, including wide angle, coloured, polarised, split vision, faceted and spectrum lenses. An informative leaflet packed with facts explains the science of sight, from a dragonfly's 30,000 lenses to an ostrich's eye being bigger than its brain.