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Blue block uv420 glasses

2022-02-15 11:34:57
Can I use the above glasses specs for watching smartphone as well as reading books or while reading books it will damage my eyesight
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Answers (2)

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Smart phone should not be used for long hours. The protection can give you a false send e of security. It is the eye strain that matters the most! The light wavelength that is absorbed is not in the visual range so you may use it while reading and writing.

Answered2022-02-15 16:00:37

YESNO

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Yes.you can use .

Answered2022-03-13 13:01:23

YESNO

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