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Edrige-Green coloured bead test, England, 1885-1925
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Edrige-Green coloured bead test, England, 1885-1925, result 1 of 1

Item Details
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Title
Edrige-Green coloured bead test, England, 1885-1925
Edrige-Green coloured bead test by Reiner & Keeler, English
Edrige-Green coloured bead test by Reiner & Keeler, English.\r\nFull view, box open with beads alongside.\r\nGraduated matt
Work Type
Ophthalmology
Date
1885-1925
Location
London
Material
box, cardboard
box, mahogany
grille, wood
Measurements
overall: 84 mm x 153 mm x 155 mm,
Description
Edrige-Green coloured bead test by Reiner & Keeler, English
There are two types of red-green colour blindness: protanopia or "red blindness" and deuteranopia. Protanopia is where patients can see in shades of blue and yellow but very little red. Deuteranopia is where patients cannot distinguish between reds with greens. It is more common in men and about 1% of the adult male population experiences one of these conditions. \n\nThe Edridge-Green coloured bead test was a practical test for colour blindness. It was invented by F. W. Edridge-Green (1863-1953). He devised several colour blindness tests used worldwide, especially by the Armed Forces. This test consists of a wooden box. Red, yellow, green and blue beads are inserted into the appropriate holes. These beads are retrieved via a sliding draw in the base of the box. The test was made in London by Reiner & Keeler.
There are two types of red-green colour blindness: protanopia or "red blindness" and deuteranopia. Protanopia is where patients can see in shades of blue and yellow but very little red. Deuteranopia is where patients cannot distinguish between reds with greens. It is more common in men and about 1% of the adult male population experiences one of these conditions. \n\nThe Edridge-Green coloured bead test was a practical test for colour blindness. It was invented by F. W. Edridge-Green (1863-1953). He devised several colour blindness tests used worldwide, especially by the Armed Forces. This test consists of a wooden box. Red, yellow, green and blue beads are inserted into the appropriate holes. These beads are retrieved via a sliding draw in the base of the box. The test was made in London by Reiner & Keeler.
Accession Number
ID Number
co153085
Source
Image and original data from Science Museum Group
Rights
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license.
All other source metadata is released under Creative Commons Zero.
File Properties
File Name
large_A600354.jpg
SSID
26322340

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