生きている人間の目の3つのコーンクラスの配置

A Roorda¹, D R Williams

¹Center for Visual Science, University of Rochester, New York 14627, USA. aroorda@popmail.opt.uh.edu

Nature

|February 24, 1999

まとめ

人間の色覚は円細胞に依存しているが,その配置は局所的な色覚を制限している. 新しい適応光学のイメージングは,生きている目の短い,中,長い波長に敏感なコンの詳細なモザイクを明らかにします.

科学分野:

ビジョンビジョン科学科学
網膜イメージングは網膜イメージングです.
人間の生理学人間生理学

背景:

人間の色彩視は,短波 (S),中波 (M),長波 (L) の3つのコンタイプに依存しています.
円のクラスは交互に交差しており,つまり1つの円タイプのみが任意の網膜点で画像をサンプリングし,局所的な色盲を引き起こす.
以前の研究では,Sコーンの地形をマッピングしていたが,ヒトのLコーンとMコーンの配置は分析されなかった.

研究の目的:

生きているヒトの網膜におけるS,M,Lの円の空間的配置を視覚化し分析する.
コーンのモザイクトポグラフィーが視覚的知覚に与える影響を調査する.

主な方法:

網膜イメージングで前例のない解像度を達成するために適応光学技術を活用しました.
結合した適応光学と網膜密度計を組み合わせて,コーン光受容体の画像を撮影します.
2人の男性被験者のS,M,Lのの配置と割合を分析した.

主要な成果:

人間の目のS,M,Lのコンの配置を詳細に示す最初のin vivo画像を取得しました.
正常な色の視力を持つ被験者間でLからMのコンの比率の有意な変動が観察されました.
両方の被験者にMまたはLのコーンが欠けている大きな網膜領域を特定しました.

結論:

コーン・モザイクの特殊な配置は,コーン・タイプがパッチに欠落していることも含め,高周波の空間を分解する視覚システムの能力に影響を及ぼします.
このコントポグラフィは,高い空間周波数で明るさのコントラスト認識を高めるために,色彩の詳細を交換する可能性があります.

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