色覚検査新試法

A new colour vision test

I．はじめに

　すでに，日眼萩原教授記念論文集に，その最初の試みの一端をのべた通り，正常眼に色フイルターをかけて，人工的につくり出した，仮性色覚異常眼の色紙に対する彩度識別能力のしらべのつづきである。

　今回は主として，濃淡3種の色フイルターを利用して，仮性強度，中等度，弱度3つの色覚異常に近い状態をつくりだし，色紙に対する彩度の識別能力をしらべた。

An attempt was made to convert normal colour vision into artificial colour defective state corresponding to protanomalia, deutero-anomalio or tritanomalia by wearing cyan, mazenta or yellow filters respectively. The ability was then tested, under thus produced colour defective states, for chromatic discri-mination of about 1,000 colour plates consis-ting of 40 hues, 8 chromatic scales and 8 values. It was found out that the chromatic discrimination pattern for red purple, purple and blue purple plates could serve as a guide in determining the kind and grade of the colour sense abnormality.