The system and method for recycling the compress heat generated at a bio-gas treatment plant that includes the assembly of a heat exchanger at each stage of compression designed to utilizing all of the gas flow and to harvest the heat in gas delivered to the air exchangers. According to some exemplary embodiments, a method of producing a customized spectacle lens for use in a personalized viewing environment, e. If the segmented objects are found, the correction characteristics of the correction process are determined on the basis of the characteristics of these segmented objects.