Bitoric rigid and soft contact lenses prescribed in tandem for keratoconus: Preliminary results
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Use of spherical rigid and spherical soft contact lenses prescribed in a “piggyback” modality has generally failed in the past. A new technique uses a back surface toric soft contact lens, which becomes bitoric when placed on the highly astigmatic keratoconus cornea, and a bitoric rigid gas-permeable contact lens worn in tandem. The lessening of rubbing and the good contact lens centration appear to be an improvement over the rigid contact lens alone.
KeywordsContact Lens Astigmatism Back Surface Keratoconus Corneal Edema
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