Who should you expect to show stronger red-eye effect?

blue-eyed people
brown-eyed people
elders
there is no difference
The iris plays no role in the effect, but the blue-eyed people have relatively low melanin in the fundus as well. Therefore, they show a much stronger red-eye effect, as the light passing fundus is not absorbed by melanin. The role of melanin in red-eye effect is nicely demonstrated in case of heterochromia (one eye blue, one brown): typically, only the blue eye displays the effect.
Kantapat Rassamee
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Very interesting!
reach: rather globaleyeslightphotography

Answers by country

blue-eyed people
brown-eyed people
elders
there is no difference
answers
flagAustria
90%
9%
0%
0%
11
flagUkraine
66%
8%
0%
25%
24
flagGreece
61%
15%
7%
15%
13
flagthe United Kingdom
53%
14%
3%
28%
64
flagPoland
50%
18%
1%
29%
8374
flagthe Philippines
50%
25%
8%
16%
12
flagthe United States
48%
24%
2%
24%
212
flagCanada
43%
6%
6%
43%
16
flagGermany
42%
19%
1%
35%
56
flagRussia
36%
21%
0%
42%
19
flagAustralia
33%
22%
0%
44%
18
flagIndia
25%
34%
9%
28%
83
flagUnknown
25%
37%
4%
33%
24