title: The "aging" of a HEMA contact lens.
abstract: The physical characteristics and attendant patient complaints associated with termination of the useful service lives of 26 HEMA lenses are compared with the characteristics of a control (undispensed) population of such lenses.
mesh_terms: D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects; D006801:Humans; D013997:Time Factors; D014867:Water
chemical_list: D014867:Water