- contact lens non–gas permeable hard
- a contact lens, generally formed of polymethyl methacrylate, that transmits little to no oxygen and carbon dioxide to the cornea. Called also PMMA contact l.
Medical dictionary. 2011.
contact lens non–gas permeable hard
Look at other dictionaries:
contact lens PMMA — a contact lens made of polymethyl methacrylate; see non–gas permeable hard contact l … Medical dictionary
contact lens hard — a contact lens that maintains its shape without support and absorbs little or no water; it may be gas permeable or non–gas permeable. Called also hydrophobic contact l. and rigid contact l … Medical dictionary
overwear syndrome — extreme photophobia, pain, and lacrimation associated with contact lenses, particularly non–gas permeable hard lenses, usually caused by wearing them excessively. Prolonged lens induced corneal hypoxia results in corneal epithelial edema and… … Medical dictionary
