What is the best way to extend the life of my glasses?

​Keep your lenses clean by washing them twice daily in normal tap water or with any special lens cleaner. Dry them with a soft cotton towel or a special eyeglass cleaning cloth. When not in use, keep them in their protective case. Never place them face down on their lenses.this will prevent the scratching of the lenses.Always use both hands while putting on or taking off your glasses, holding the temples midway on each side and sliding them backwards over your eyes.