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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Intrastromal corneal ring segments ： ウィキペディア英語版 Intrastromal corneal ring segments Intrastromal corneal rings (also referred to as intracorneal rings, INTACS, Kerarings, Ferrara rings, or corneal implants〔) are small devices implanted in the eye to correct vision. In this procedure, an ophthalmologist makes a small incision in the cornea of the eye, and inserts two crescent or semi-circular shaped ring segments between the layers of the corneal stroma, one on each side of the pupil. The embedding of the rings in the cornea is intended to flatten the cornea and changing the refraction of light passing through the cornea on its way into the eye. ==Medical uses== Intrastromal corneal rings were originally used to treat mild myopia.〔 For this purpose, they have largely been superseded by excimer lasers, which have better accuracy.〔 They are now mostly used to treat mild to moderate keratoconus.〔 Intrastromal corneal rings were approved in 2004 by the Food and Drug Administration for people with keratoconus who cannot adequately correct their vision with glasses or contact lenses, and for whom corneal transplant is the only other option. They were approved under the Humanitarian Device Exemption,〔(【引用サイトリンク】 date = 26 July 2004 )〕 which means the manufacturer did not have to demonstrate effectiveness. According to the FDA, these products should not be used by people who "can achieve functional vision on a daily basis using contact lenses."〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Intrastromal corneal ring segments」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.