Thank goodness we've finally found a way to purchase glasses that don't cost a fortune! After paying $500 or more for progressive lens glasses for many years, we can now get order our KZFOO glasses for a fraction of the price! I can even buy several different styles of glasses when I choose, instead of feeling like I need to wear the same glasses for years because of the cost. KZFOO glasses are light and comfortable and the optics are acceptable.