Tips: 1. Please clean the lens with special wipe cloth, soft handkerchief or tissues. 2. Wipe the lens after wishing when the lens is stained with dust and sand 3. Try to remove the stubborn stains with the soapy water 4. Don't put your glasses in high temperature for a long time. 5. Please keep the mirror face up and do not put the mirror down 6. Please use the both hands to wear the glasses and hold the temple gently