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
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0%
10%
89%
19
flagItaly
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0%
13%
86%
23
flagAustralia
4%
0%
8%
85%
47
flagSweden
0%
7%
7%
84%
13
flagthe United States
0%
0%
15%
82%
467
flagRepublic of Ireland
0%
4%
16%
79%
24
flagthe United Kingdom
0%
0%
20%
78%
186
flagSouth Africa
0%
0%
21%
78%
14
flagthe Netherlands
0%
0%
22%
77%
18
flagIndia
1%
3%
17%
76%
229
flagGermany
1%
1%
23%
74%
361
flagAustria
0%
0%
26%
73%
52
flagGreece
0%
0%
26%
73%
23
flagUnknown
4%
0%
22%
72%
22
flagPoland
0%
0%
26%
71%
18596
flagSwitzerland
2%
0%
28%
69%
39
flagCanada
0%
0%
33%
63%
36