What number is that?

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The term 'daltonism' comes form the name of English chemist John Dalton, who published the paper "Extraordinary facts relating to the vision of colours" in 1798, after the realization of his own colour blindness.
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Very interesting!
reach: rather globalcolor blindnesscolorsmedicinenumbers

Answers by country

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answers
flagthe Philippines
0%
0%
7%
92%
28
flagPakistan
2%
0%
6%
91%
46
flagMalaysia
0%
0%
4%
90%
22
flagNigeria
0%
0%
10%
89%
19
flagItaly
0%
0%
13%
86%
23
flagAustralia
4%
0%
8%
84%
46
flagSweden
0%
7%
7%
84%
13
flagthe United States
0%
0%
15%
82%
458
flagRepublic of Ireland
0%
4%
16%
79%
24
flagSouth Africa
0%
0%
21%
78%
14
flagIndia
1%
3%
16%
77%
228
flagthe United Kingdom
0%
0%
21%
77%
177
flagAustria
0%
0%
26%
73%
52
flagGreece
0%
0%
26%
73%
23
flagthe Netherlands
0%
0%
26%
73%
15
flagGermany
1%
1%
24%
72%
343
flagUnknown
4%
0%
22%
72%
22
flagPoland
0%
0%
26%
71%
18534
flagSwitzerland
2%
0%
27%
70%
37
flagCanada
0%
0%
33%
63%
36