Sightline Computer Reading Glasses 6002 feature the patented SightLine progressive power multifocus lens in a light-weight semi-rimless optical quality metal frame. They should last for years and come with a six month replacement warranty. The frame on these reading glasses are optical quality - not cheap drug store reader quality. This new model now also features anti-reflective coated lenses to aid in glare reduction. Satisfaction guaranteed - free shipping both ways.