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Which of the following is the worst for eyesight during a sunny day?

wearing sunglasses with UV filter
wearing sunglasses without UV filter
not wearing sunglasses at all
wearing sunglasses inside buildings
Wearing sunglasses without UV filter causes the pupils to dilate and eyes to absorb more UV rays than they normally would without the sunglasses. Hence, it's much better not to wear sunglasses at all, than to wear ones without UV filter.
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Answers by country

wearing sunglasses with UV filter
wearing sunglasses without UV filter
not wearing sunglasses at all
wearing sunglasses inside buildings
answers
flagAustria
0%
82%
11%
5%
17
flagPakistan
4%
78%
14%
2%
41
flagGermany
1%
66%
27%
4%
114
flagItaly
7%
64%
28%
0%
14
flagAustralia
0%
58%
36%
4%
41
flagNorway
0%
58%
41%
0%
12
flagCanada
9%
56%
28%
3%
32
flagRepublic of Ireland
0%
53%
36%
9%
41
flagthe Netherlands
5%
47%
31%
15%
19
flagNigeria
26%
47%
21%
5%
19
flagPoland
3%
46%
36%
12%
13472
flagthe Philippines
15%
45%
25%
10%
20
flagthe United Kingdom
4%
44%
41%
9%
150
flagGreece
12%
43%
37%
6%
16
flagIndia
13%
35%
33%
15%
216
flagEgypt
14%
35%
28%
14%
14
flagthe United States
5%
34%
48%
9%
215
flagthe United Arab Emirates
10%
30%
40%
20%
10

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