Digital (HD) progressive (no-line) lenses correct for every focal length, including distance, intermediate, and reading. Digital (HD) progressives have custom lens designs, allowing for the best peripheral vision, wide corridors, and smooth visual fields. Also referred to as 'no-line bifocals' and 'no-line trifocals,' progressive lenses look like single vision lenses, with a corridor of increasing power as you travel down the lens.