Presentation fo CHAOS2015, 8th CHAOS 2015 International Conference at Henri Poincaré Institute, Paris France, 26 - 29 May 2015. The hyperbolic prism is a transparent optical element with spherical polished surfaces that refracts and reflects the light, acting as an optical element of foam. Using the hyperbolic prism we can face the question: is there any self-similarity in foams due to light scattering? In order to answer this question, we have constructed two optical elements: the hyperbolic kaleidoscope and the hyperbolic prism.