Jim Halo glasses are matched with a Jim Halo patented developed blue blocking lens, JH-BlueCare ® Lens. JH-BlueCare ® Lens can smartly only filter the harmful blue light but keep the benefit light. The requirement is collected by Jim Halo and produced by a leading lens material manufacturer who also serve for the big lens brand. It has the same blue light filtering effect as big lens brand in the market. Its price is only 30% of the similar one. At jimhalo.com, you only spend $10 to get a pair of perfect blue light filtering glasses.