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Article
February 1986

Treatment of Small Undercorrections and Overcorrections in Radial Keratotomy

Author Affiliations

Canoga Park, Calif

Arch Ophthalmol. 1986;104(2):177. doi:10.1001/archopht.1986.01050140029007
Abstract

To the Editor.  —I have been treating some of the small overcorrections and undercorrections after radial keratotomy in my patients with hard gaspermeable contact lenses. Extensive experience in ophthalmic and optometric centers has well documented the efficacy of hard contact lenses in molding and maintaining the corneal curvature, provided that a so-called retainer lens is used on a continuing basis. As soon as the contact lens wear is discontinued, "corneal memory" causes the cornea to gradually return to its original curvature.1I have used gas-permeable hard contact lenses with plano power on a part-time basis in a few patients who have undergone radial keratotomy. My preliminary findings are that the keratometric readings steepen or flatten depending on the lens curvature (as would be expected) and retain some of that change after the lens wear is discontinued.It seems that applying principles of orthokeratology to a malleable cornea can alter

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