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Effect of piggyback system with disposable soft contact lens on the corneal shape in keratoconus Kenji Sano 1 , Yoshihiro Kitazawa 1 , Takashi Tokoro 1 1Dept of Ophthalmol, Tokyo Med and Dental Unit Sch of Med pp.613-615
Published Date 1994/4/15
DOI https://doi.org/10.11477/mf.1410903729
  • Abstract
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We treated 6 eyes with keratoconus using a piggyback system with disposable soft contact lens. The corneal shape after 1 year of wearing was compared with that at the time of prescription and one year before when a conventional hard contact lens was in use. The corneal shape was expressed by an index K, or-(Q/R)×103, which was obtained by approximating the corneal shape to a conicoid curve: X2+(Q+1) Y2-2RY=0. The index K during the period of hard contact wear was-64.2±88.6 and that during piggyback lens system wear was-138±122.0. The results indicate that the piggyback lens system is comparable to hard contact lens alone regarding the beneficial effect on the corneal shape in keratoconus.


Copyright © 1994, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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