In this chapter, the following terms have the meanings indicated. Terms Defined. “Contact lens” means a medical device of any material or power, including plano or zero-powered, that is placed directly on: The cornea; or The cornea and sclera. “Contact lens prescription” means “replacement contact lens prescription” as defined in Health Occupations Article, §11-404.4, Annotated Code of Maryland, and any federal statute and regulations that may supersede this Health Occupations citation.