Ishihara colour blindness test, London, England, 1948
1948
Edrige-Green coloured bead test, England, 1885-1925
1885-1925
Holmgren's coloured wool test for colour blindness, Europe, 1871-1900
1871-1900
Grossmann's colour vision test, London, England, 1890-1900
1890-1900
Eight Ishihara charts for testing colour blindness, Europe, 1917-1959
1917-1959