Merging Complex Curves – Front Surface Innovation for Free-form Progressive Lens Optimization

By Deborah Kotob, ABOM

Release Date: October 1, 2019

Expiration Date: October 30, 2021

Learning Objectives:

Upon completion of this program, the participant should:

  1. Learn the importance of matching Rx power with a compatible, optically-correct base curve
  2. Learn how a progressive lens blank with a variable base curve front surface improves upon the single vision blanks typically used in free-form surfacing
  3. Learn why variable base curves can improve the optical characteristics, range, and cosmetics of progressive digital lenses.
  4. Learn about the contribution of mean sphere power to produce lateral defocus in a progressive lens and learn about a breakthrough patented PAL design technology that minimizes its effect for greater image stability.

Course Description:

In this course, you will learn about patented break-through lens form and design technologies for better optimization of free-form progressive lenses. As ECP's our objective is to improve the progressive lens patient's visual experience. Even with free-form technology, progressive lenses continue to present challenges for some patients. Free-form was a technological leap forward, allowing for greater precision application of lens design and the optimization of the lens surface topography. In addition, it opened up the opportunity to compensate for individual 'as worn' frame fit parameters. The Rx design computation occurs in real-time and in unison with other parameters. Even high wrap sports frames can be compensated. So, free-form is great! But can it be made better? The answer is yes. You will learn in this course that the single vision blanks used in standard backside free-form progressive lens technology are not the ideal lens form foundation upon which to build a digital progressive lens design and why. You will learn about the optical fundamentals behind the unique Camber progressive lens blank and the unique patented Camber Steady Methodology technology that reduces not only unwanted cylinder to its mathematical limits but also reduces mean sphere power and its contribution to lateral defocus in a progressive lens.

Faculty/Editorial Board:

Deborah Kotob Deborah Kotob, ABOM, is currently director of education for Jobson Medical Information LLC, has more than 20 years of experience as an optician. With over 10 years in lens manufacturing as a Sales Consultant, Trainer and LMS content developer. She lectures, trains and conducts webinars on a variety of optical and practice development topics.

Credit Statement:

This course is approved for one (1) hour of CE credit the American Board of Opticianry (ABO)1 hour, General Education Course STWJHI1010-2



This course has multiple parts.

Please download and read the PDF version, watch the video presentation, download and review any of the resources that are part of the resources tab. For the final steps review the questions for the test and take the test.

Click here for the PDF.

PDF PDF (pdf)
Click here for Video.

Video PRESENTATION (video)