Main Entry: Holm·gren yarn test

Pronunciation: \ˈhōm-grən-ˈyärn-, ˈhōlm-\

Function: noun

: a method of testing color vision by the use of colored wool yarns—called also Holmgren test, Holmgren wool test

Holm·gren \ˈhȯlm-ˌgrān\ Alarik Frithiof (1831–1897), Swedish physiologist. Holmgren introduced his test for color blindness in an 1874 article.