LG 55LM670T User Manual page 168

Cautions❐When❐Using❐Dual❐Play❐Glasses
❐ ❐
✎ Please note that Dual Play glasses are different from regular 3D glasses.
There is the mark "Dual Play" written on the Dual Play glasses.
✎ Do not use Dual Play glasses as ordinary glasses, sunglasses or protective
goggles. If you do so, this may cause injury.
✎ Do not store Dual Play glasses in very hot or very cold conditions. If you do,
this may cause them to become distorted. Do not use distorted glasses.