Adlens Sundials, variable focus sunglasses, are a must have essential for golf enthusiasts and lovers of the outdoors. Adlens Sundials are the first of thier kind, allowing users to instantly adjust the strength of the lenses in seconds with the turn of a dial. Available in four colors, Sundials provide UVA/UVB protection while allowing for near, intermediate and distance vision correction - all with a single pair! They make great gifts for men or women, golfers, or not. Read my full review for tech details, where to buy, costs, etc..