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| Diamond knife ： ウィキペディア英語版 |
Diamond knife
A diamond knife is a very sharp knife whose edge is made from diamond, invented by Humberto Fernández Morán in 1955.〔(【引用サイトリンク】title=Patente Cuchilla Diamante )〕 Diamond knives are used for medical and scientific applications where an extremely sharp and long-lasting edge is essential. The knives are very expensive to initially purchase, depending on the quality and size of the knife; in addition the knives must be professionally sharpened as the edge dulls.
==Eye surgery==
Diamond knives are used in eye surgery, specifically in refractive surgery.
In particular they are the main tool, together with the microscope, for the radial keratotomy invented by Svyatoslav Fyodorov to correct myopia and for the Mini Asymmetric Radial Keratotomy (M.A.R.K.), invented by Marco Abbondanza to correct astigmatism and cure the first and second stages of keratoconus.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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