I have bought a brandless sunglasses, is there any method to test?!
Question:
I have bought a brandless sunglasses, is there any method to test?
whether its has UV protection which the product claims to have?
need to foolproof and relatviely cheap to prove, thanks!
Answers:
The only method I know is to call the opticals in your area and see if they have a UV meter and are willing to test it for you.