How long would it take for eye to get damage by laser reflection?

If say i was to shine my laser around in a lit room and it reflected off like a white dress shirt or white rag, would that reflection damage my eyes. My laser is from ebay - Military 20 Miles Blue Purple 405nm Laser Pointer Pen Visible Beam+18650+Charger | eBay

Would it damage my eyes even if i had those cheap laser safety glasses?

Thank you for your time. I just want to make sure and be safe.