BetaWe’re improving how search works. Find out more.
Digital Images

Holmgren's coloured wool test for colour blindness, Europe,

Science Museum, London

Download

Free to use with attribution CC BYCredit: Science Museum, London
Can I use this?

About this digital image

Description

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. maker: Unknown maker Place made: Europe



Identifiers


License information

License information

You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence.

Creative Commons Attribution (CC BY 4.0) terms and conditions https://creativecommons.org/licenses/by/4.0

Credit

Holmgren's coloured wool test for colour blindness, Europe,. Credit: Science Museum, London. CC BY


We’re improving the information on this page. Find out more.