
A Guide to Manufacturer-Recommended Base Curves for Progressive Lenses
Aug 7, 2025 10:00:00 AM
Selecting the proper base curve has long been a hot topic among opticians. Traditionally, labs followed a simple rule of thumb: keep the back curve of the lens as close to a 6.00 diopter as possible for optimal optics. For most prescriptions—aside from high plus powers (typically +5.00 and above)—this worked just fine.
But with the rise of freeform digital lenses, the game has changed.