色覚異常に於けるGenetic Carrierの色覚について

Studies on genetic carrier of color deficiency

I．緒論

　遺伝疾患に於けるgenetic carrier （以下単に，carrierと省略する）の性質に関しては，遺伝学的にも臨床的にも極めて重要且つ興味ある問題で，諸種の疾患について研究されている。

　色覚異常のcarrierの形質に関しても，1927年Waaler^1）が始めて石原氏表の誤読が多いと記載して以来，種々の報告がなされているが，その結果に一致を欠いている。

Color vision examinations with Ishihara's Plates and H-R-R Plates, anomaloscope and the measurement of relative spectral sensitivity by a modified flickerphotometer were given on 41 genetic carriers of both protan and deutan types of color deficiency.

1) The misreadings of two of 17 selected Ishihara's Plates were shown in the highest percentage of 36.6%, and 24.4% passed this test without any misreading. The number of those who misread 1 to 3 plates amounted to 65%. The mean number of misreading for each examinee was about 3 or 4 times as large as that of normals.