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Limits of Corrections of Refractive Errors by Contact Lens Shuitsu Nakao 1 , Mototsugu Saishin 1 , Katsunori Yamada 1 1Department of Ophthalmology, Nara Medical University pp.1065-1067
Published Date 1972/8/15
DOI https://doi.org/10.11477/mf.1410204836
  • Abstract
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The contact lens has, in general, greater me-rits in correcting the refractive error than spe-ctable lens. Theoretically, though, the contact lens can correct only the astigmatism of the cornea, as the tear film between the lens and the cornea functions as the cylindrical lens and thus counteracts the corneal astigmatism. That this assumption is open to question has been shown by the present authors by calculation of the cylindrical effect of the tear film using the ray tracing method in aspherical eye model by computer.


Copyright © 1972, 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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