The present invention provides a pharmaceutical preparation containing basic physiologically active substance and enteric polymer, which has improvements in releasability of the contained physiologically active substance in intestinal canal. Such storage units exhibit sufficient impact resistance to protect the target disc and sufficient clarity that any informational literature may be placed entirely within the storage unit and easily viewed and read through the walls thereof without impediment. In one embodiment, the eyeglass case is configured to permit a consumer to view the entire eyeglass frame. Thus, once the restraining structures, which hold the prosthesis in the collapsed state, are disengaged, the prosthesis automatically expands to a deployed state.