Holmgren's coloured wool test for colour blindness, Europe, 1871-1900

Made:
1871-1900 in Europe
Holmgren's coloured wool test for color blindness, in original case with instructions, USA.  Full view, with box,

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Holmgren's coloured wool test for color blindness, in original case with instructions, USA. Full view, with box,
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Holmgren's coloured word test in original case with instructions

The patient had to match one piece of wool to the samples in the box in this colour blindness test. There are light and dark shades to confuse the patient. This helped detect problems. The numbers on the pieces of wool were codes. The doctor used them to determine what type colour blindness the patient had.

Swedish physiologist Alarik Frithiof Holmgren (1831-1897) devised this test in 1874. He pursued his investigations following a railway accident in Sweden in 1876. The accident was believed to be caused by a colour blind train driver. Following Holmgren’s research, colour blindness tests were made compulsory for railway and shipping workers in Sweden.

Details

Category:
Ophthalmology
Collection:
Sir Henry Wellcome's Museum Collection
Object Number:
A662592
Materials:
cloth, metal, paper and wool
type:
colour blindness test