Year Invented - 1959
Inventor - Otto Wichterle (Czech chemist)
Function - Provides a smooth, gradual transition between multiple vision zones of distance, intermediate, and near.
Details - Allows clear vision at all distances without the visible line(s) found in bifocals and trifocals. Progressive lenses most commonly come in three forms: narrow (more precise and recommended for slight prescriptions), wide (more forgiving and recommended for stronger prescriptions), and custom (most ideal, digitally designed to fit wearer's exact prescription).
Common uses for the distance, intermediate, and near vision zones of progressive lenses.
Photo Creds: Select Specs