Specialty Archery’s Double Vision Kit (DVK) is an inexpensive, all-inclusive scope package that allows archers to try the Double Vision lens system without breaking the bank. The Double Vision lens system offers more versatility and customization than the original True Spot lens. The Double Vision lens system pairs a positive powered lens with a drilled and tinted negative powered lens to provide a unique aiming concept for target archery. By eliminating the aiming dot, and instead simply centering the bullseye within the lens, target panic is greatly reduced. - See more at: http://www.specialtyarch.com/products-page/new-products/double-vision-1-38-scope-kit/#sthash.15CQyHWi.dpuf