RESUMEN
PURPOSE: To reshape or flatten the corneas of post-radial keratotomy (RK) patients with residual myopia to improve uncorrected vision. METHODS: Twenty-one eyes (12 patients) with undercorrected RK results were fit with the Lexington RK splint, a multicurve plateau concept RGP contact lens. RESULTS: After wearing the lens an average of 6.1 months, undercorrected visual acuity improved an average 3.4 lines; change in spherical equivalent averaged 0.77 D; and flat K change averaged 0.75 D. Seventeen of 21 eyes (81%) demonstrated improved uncorrected vision. Nine eyes (43%) subsequently had a decrease in vision after discontinuing lens wear. Patients fit within 7 months of their last RK procedure were more likely to achieve optimal results. Sixty-two percent of this group did not require glasses or contact lenses (range: 4 to 21 months). CONCLUSIONS: A well-designed and fit plateau RGP contact lens can manipulate the healing post-RK cornea.
Asunto(s)
Lentes de Contacto , Queratotomía Radial , Miopía/terapia , Adulto , Topografía de la Córnea , Femenino , Humanos , Masculino , Persona de Mediana Edad , Miopía/etiología , Diseño de Prótesis , Agudeza VisualRESUMEN
We conducted a study of 25 post-penetrating keratoplasty (PK) patients (28 eyes) fit with Quintasphere PK rigid gas permeable contact lenses. Using the Quintasphere PK trial set, 96% of patients were successfully wearing the lens at 6 months; at 1 year 93% were successfully wearing the lens. Eighty-two percent of eyes fit achieved at least 20/40 visual acuity, and 93% achieved at least 20/50. The average number of lenses fit per eye was 1.29. The design basis of the Quintasphere PK lens was predicated on a plateau-shaped corneal graft.