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25. Visual acuity with spherical and toric soft contact lenses in low- to moderate-astigmatic eyes. Richdale K, Berntsen DA, Mack CJ, Merchea MM, Barr JT. Optom Vis Sci; 2007 Oct; 84(10):969-75. PubMed ID: 18049362 [Abstract] [Full Text] [Related]
32. Adaptation to Paraperm extended wear lenses: a clinical study in Sweden. Rengstorff RH, Odby A. J Am Optom Assoc; 1986 Aug; 57(8):600-3. PubMed ID: 3462240 [Abstract] [Full Text] [Related]