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Mini asymmetric radial keratotomy
Mini asymmetric radial keratotomy (MARK) is a surgical procedure used to treat keratoconus and correct astigmatism, developed by Italian eye surgeon Marco Abbondanza in 1993, then improved in 2005.〔(From Who's Who in Italy - Marco Abbondanza )〕〔(From Marquis Who's Who - Marco Abbondanza )〕
==Procedure==
MARK surgery consists of a series of micro-incisions of variable depth, with a length between 1.75 and 2.25 millimeters, always made with a diamond knife and a "double concentric corneal marker", designed to cause a controlled scarring of the cornea, which changes its thickness and shape. MARK is never performed on the optical zone, being done only in the area where keratoconus is localized, therefore both the flattening and the structural reinforcement of scar tissue occur only locally in the distorted zone, avoiding an excessive flattening of the cornea.〔Abbondanza, M. (1997). "Mini Cheratotomia Radiale Asimmetrica (Mini ARK) per la correzione chirurgica del cheratocono in fase iniziale, nell’ipermetropia e nelle miopie lievi". ''Esperienze'' (in Italian) 12 (1): 21-24〕 Mini Asymmetric Radial Keratotomy, if done properly, is able to correct astigmatism and stabilize the first and second stages of keratoconus, avoiding the need for a corneal transplantation.〔http://www.centronazionalelaser.com/sito%20dentro/mini%20cheratotomia.htm〕〔http://www.ilgiornale.it/medicina/la_curva_pericolosa__cornea/24-05-2008/articolo-id=263900-page=0-comments=1〕
Mini asymmetric radial keratotomy can also be used in combination with corneal collagen cross-linking, parasurgical treatment for keratoconus.〔(Da bmctoday.net )〕〔(Da tv.mediaset.it )〕〔http://www.rai.tv/dl/RaiTV/programmi/media/ContentItem-d42098a4-5d1d-457f-9fbe-98b36cb8443c-tg2.html〕
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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