Section 886.1385 - Polymethylmethacrylate (PMMA) diagnostic contact lens(a)Identification. A polymethylmethacrylate (PMMA) diagnostic contact lens is a device that is a curved shell of PMMA intended to be applied for a short period of time directly on the globe or cornea of the eye for diagnosis or therapy of intraocular abnormalities.(b)Classification. Class II.