ABO NOCE Basic Opticianry

Answer: A - The term short corridor in a progressive lens refers to the shorter amount of space in the lens for all ranges of vision going from far to near vertically.

Short corridor lenses are recommended for small frames which have small B measurements and cannot contain a lens with a regular corridor. Trying to fit a regular progressive lens into a small frame will result in either cutting off some of the distance at the top of the lens or the near at the bottom.