Is it true that polarized lenses can pose an edging challenge because they can delaminate?
SOLUTION: Delamination used to be a concern when it came to processing polarized lenses. Most of the problems were caused by the polarization material and the way the lenses were put together. Because the quality of the polarization process has drastically improved over the years, delamination is no longer a concern. Improvements in edging equipment have also decreased the difficulty of edging polarized lenses. The new patternless edgers have computer-controlled grinding and chucking pressure, which also eliminates potential delamination. There are some issues to be aware of when edging these special lenses. Make sure the manufacturer’s 180-degree orientation marks are properly aligned. If the orientation isn’t at exactly 180 degrees, the polarization will not work. Also, sizing is critical when working with polarized lenses.
