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When someone scans a barcode on my phone, how does the laser from the barcode scanner not reflect from the glass and into my eyes causing permanent eye damage? - Quora
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What is a QR code and are they safe?
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QR code - Wikipedia
Top 10 Best Automatic Barcode Scanners – Reviews & Buying Guide 2020 – Gorilla Output
Will using a barcode scanner to scan a barcode on my smartphone display damage the display by melting the display or something since a barcode scanner uses high powered lasers? - Quora
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