title: Hydrogel versus rigid gas permeable lenses for extended wear: criteria and differences.
abstract: The clinical investigation of several high oxygen flux lens materials has demonstrated that practitioners should soon have a viable alternative to hydrogel extended wear lenses. Practitioners can base their decision on several factors prior to selecting the appropriate lens. In many cases a rigid lens may be the appropriate alternative based on these factors.
authors.forename: E S
authors.initials: ES
authors.lastname: Bennett
mesh_terms: D003262:Contact Lenses, Extended-Wear / Q000009:adverse effects / Q000592:standards*; D003263:Contact Lenses, Hydrophilic / Q000592:standards*; D003316:Corneal Diseases / Q000517:prevention & control; D005740:Gases; D006801:Humans; D006813:Humidity; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D010100:Oxygen; D010353:Patient Education as Topic; D010539:Permeability; D011092:Polyethylene Glycols; D013696:Temperature; D014785:Vision, Ocular
chemical_list: D005740:Gases; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011092:Polyethylene Glycols; D010100:Oxygen