Once a general idea of design and materials have been selected, the next step is to provide proofs in order to confirm these decisions. Composite images will be produced using a head shot to give an accurate representation of the spectacles to be. Often times this is the stage where the final decision is made. On the other hand, it can also bring the process right back to the design stage if the designs do not work as well as was thought. The process continues until the perfect combination of design and materials has been reached.