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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 Cone of light ： ウィキペディア英語版 Cone of light :''Not to be confused with the Light cone.'' The Cone of light, or light reflex, is a visible phenomemon which occurs upon examination of the tympanic membrane with an otoscope. Shining light on the tympanic membrane causes a cone-shaped reflection of light to appear in the anterior inferior quadrant. This corresponds to the 4 o'clock to 5 o'clock position in the right eardrum and the 7 o'clock to 8 o'clock position in the left eardrum.〔Cone of Light Anatomy - http://www.webster.edu/~davittdc/ear/tympanic/tympanic.htm〕 The apex of the cone is at the most depressed part of the tympanic membrane, known as the umbo. ==Absence of a cone of light== The absence of a cone of light does not necessarily signify an ear disorder, as it could be due to the slope of the tympanic membrane or the shape of the ear canal. However, distortions in the cone of light can also be a sign of increased inner ear pressure or otitis media. 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「Cone of light」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.