What is the easiest way to see this photo in 3-D?

use polarizing glasses
use red and cyan glasses
use wide-angle glasses
squint eyes
This is anaglyph 3D, an image which contains two differently filtered colored images, one for each eye. Red/Cyan channels are the most common, but Magenta/Green and Blue/Yellow are also popular.
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Answers by country

use polarizing glasses
use red and cyan glasses
use wide-angle glasses
squint eyes
answers
flagUnknown
7%
78%
0%
14%
14
flagAustralia
11%
77%
3%
7%
27
flagGermany
27%
68%
0%
4%
22
flagCanada
16%
63%
0%
20%
30
flagthe United States
19%
58%
4%
15%
346
flagPoland
23%
56%
8%
10%
7697
flagIndia
25%
49%
9%
11%
142
flagthe United Kingdom
21%
49%
6%
20%
83
flagthe Philippines
31%
45%
9%
13%
22
flagAustria
40%
40%
20%
0%
10
flagGreece
50%
30%
10%
10%
10