title: A comparison of two techniques of refitting long-term polymethyl methacrylate contact lens wearers.
abstract: Two techniques for fitting long-term polymethyl methylcrylate (PMMA) lens wearers with a gas-permeable hard lens are compared. These are: complete cessation of all lens wear for the period necessary to achieve stability in the patient's refraction and corneal curvature, and immediate refitting with a Polycon lens. Eleven patients who had worn hard contact lenses for at least 3 years and had wearing times of at least 8 hr per day were refitted with each technique. Refitting with Polycon lenses slowed but did not otherwise inhibit the recuperative changes taking place in the cornea after PMMA lens removal; vision was better and more stable with this group.
mesh_terms: D000328:Adult; D003261:Contact Lenses / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D008768:Methylmethacrylates / Q000592:standards; D009907:Optometry / Q000379:methods*; D012030:Refractive Errors / Q000628:therapy*
chemical_list: D008768:Methylmethacrylates