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23. Cosmetic extended wear of oxygen permeable hard contact lenses: one year follow-up. Kamiya C. J Am Optom Assoc; 1986 Mar; 57(3):182-4. PubMed ID: 3457081 [Abstract] [Full Text] [Related]
37. A piggyback contact lens for the correction of irregular astigmatism in keratoconus. Tsubota K, Mashima Y, Murata H, Yamada M. Ophthalmology; 1994 Jan; 101(1):134-9. PubMed ID: 8302546 [Abstract] [Full Text] [Related]