Which part of a dog's or a cat's eye reflects the light?

conjuctiva
pupil
iris
a layer behind retina
Many ver­te­brates, es­pe­cial­ly noc­tur­nal ones, have the re­flect­ing layer called tapetum lucidum. It reflects the light back through the retina, in­creas­ing the amount of light avail­able to the pho­tore­cep­tors.

Answers distribution

conjuctiva
pupil
iris
a layer behind retina
answers
flagSwitzerland
0%
0%
11%
88%
18
flagUkraine
0%
7%
14%
78%
14
flagNorway
7%
4%
21%
66%
42
flagthe United Arab Emirates
7%
15%
15%
61%
13
flagFrance
3%
9%
29%
58%
31
flagAustralia
3%
3%
37%
56%
32
flagthe United Kingdom
6%
13%
24%
54%
275
flagthe Netherlands
3%
9%
32%
54%
31
flagRepublic of Ireland
7%
30%
10%
51%
39
flagthe United States
9%
17%
20%
50%
432
flagItaly
7%
11%
26%
53%
26
flagCzech Republic
0%
28%
21%
50%
14
flagPoland
10%
16%
23%
49%
14514
flagGermany
5%
19%
28%
47%
170
flagPakistan
13%
26%
13%
46%
15
flagCanada
14%
11%
31%
42%
35
flagthe Philippines
23%
23%
11%
41%
17
flagUnknown
14%
14%
32%
38%
752
flagIndia
9%
24%
27%
37%
114
flagSweden
15%
15%
34%
34%
26

Gender

men42%
women48%
conjuctiva
12%
10%
pupil
15%
17%
iris
30%
22%
a layer behind retina
42%
48%

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Which part of a dog's or a cat's eye reflects the light?
942
48%

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