Optometry and Vision Science · 1994 · 16 citations · 39 references
MedicineDermatologyOphthalmologyClinical Vision ScienceOcular PathologyOphthalmic SurgeryContact Lens Clinical PracticeContact Lens ComplicationsContact Lens InterventionsLens CareRigid Gas-permeable Contact LensesSoft Contact LensesContact Lens-associated KeratitisContact Lens-induced Papillary ConjunctivitisContact Lens-related Giant Papillary ConjunctivitisCorneal ComplicationsKeratoconus Contact Lens ManagementLensesNeovascularizationStatic Visual Acuity
BACKGROUND: A piggyback contact lens system (PBCLS) is used when traditional lenses do not provide optimal vision or tolerance. This study assessed the use of PBCLS in keratoconic patients. METHODS: The charts of 205 keratoconic patients were retrospectively reviewed and 16 patients wearing PBCLS were identified. Visual acuity, average wearing time, and ocular complication data with PBCLS were analyzed. RESULTS: Vision and average lens wearing time were stable, if not improved, for the 16 patients when the data was compared to the patients' wear of rigid gas permeable contact lenses. Although two patients developed neovascularization and one patient developed giant papillary conjunctivitis, all pre-existing corneal complications resolved with PBCLS wear. Average Dk/L through the center and mid-periphery of the PBCLS were 8.4 +/- 1.2 x 10(-9) (mean +/- standard deviation) and 4.5 +/- 1.8 x 10(-9) cm2ml O2/sec ml mmHg (mean +/- standard deviation) respectively. No gross corneal edema was noted upon slit lamp observation. CONCLUSIONS: PBCLS can be beneficial in the management of keratoconus.
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