Exemplary embodiments enable an enhanced direct-viewing optical device to make customized adjustments that accommodate optical aberrations of a current user. A sleeve is injection molded in-situ inside the housing in which a pierce pin assembly is reciprocatably mounted within a central bore thereof. The optical fiber terminates in the housing at an optical fiber termination. Next, the system analyzes a given class in the map of the collection of classes to determine if the given class extends any other class in the collection of classes.