Front Surface Innovation
Nucleo 4D lens blank features a variable base curve — a new front surface innovation that provides the optically ideal base curve in all viewing zones.
Single Vision Blank
The single vision lens blank has one
base curve from top to bottom.
Nucleo 4D Blank
The Camber lens blank has a patented, continuously
increasing base curve, ideal for the increasing power
profile of free-form progressive lenses.
Each Nucleo 4D lens blank comes from a section of the "Elephant's Trunk" curve, creating a unique variable base curve front surface that
continually increases in diopter from top to bottom. This improved front surface profile gives each viewing zone a base curve that is well-suited to its function.
Variable Base Curve
The radius of the blank continually decreases from top to bottom.
Stacking Of The Spheres
Increasing Curve
The Nucleo 4D front surface features an increasing base curve from top to bottom: lower diopter in the distance zone, higher diopter in the reading zone.
This "stacking of the spheres" is a totally new idea, unique to Nucleo 4D lenses.
From the top of the lens blank to the bottom, the base curve increases up to three diopters. This "stacking of the spheres" is a totally new idea, unique to Nucleo 4D lenses.
This new front surface innovation provides benefits to wearers in both the distance and near zones. Wearers enjoy noticeably increased acuity in the periphery of the distance zone, as well as a reading area that is more comfortable and easier to find with the eye.