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
flagUkraine
0%
7%
14%
78%
14
flagNorway
7%
4%
21%
65%
41
flagthe United Arab Emirates
0%
18%
18%
63%
11
flagAustralia
3%
3%
37%
56%
32
flagFrance
3%
10%
30%
56%
30
flagthe United Kingdom
6%
13%
24%
55%
266
flagRepublic of Ireland
8%
29%
10%
51%
37
flagthe United States
10%
17%
20%
50%
427
flagItaly
7%
11%
26%
53%
26
flagthe Netherlands
4%
8%
37%
50%
24
flagPoland
11%
16%
23%
48%
13725
flagGermany
4%
18%
28%
48%
163
flagCzech Republic
0%
30%
23%
46%
13
flagPakistan
15%
23%
15%
46%
13
flagthe Philippines
18%
25%
12%
43%
16
flagCanada
14%
11%
31%
42%
35
flagIndia
9%
24%
26%
38%
112
flagUnknown
14%
14%
33%
37%
715
flagSweden
16%
16%
36%
32%
25
flagBelgium
0%
27%
45%
27%
11

Gender

men41%
women48%
conjuctiva
12%
10%
pupil
15%
17%
iris
30%
22%
a layer behind retina
41%
48%

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question
answers
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Which part of a dog's or a cat's eye reflects the light?
910
48%

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