Not necessarily: Any sunglasses that do not block uv rays can be harmful to your eyes, be they made of glass, plastic or some other material. Make sure your sunglasses block both uv/a and uv/b rays and you should be fine.
Answered 9/20/2017
6.2k views
No: Any barrier from environment is good. It blocks foreign objects, injuries, most harmful uv rays.
Answered 11/26/2013
6.1k views
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