What YOu Need to Know About Chemistrie - Eyewear That Clicks

By Dennis Zelazowski
When I think about the evolution of the refractive lens, from single vision, to bifocal, to trifocal, to progressive lenses, I see Chemistrie as the next step in the evolution of spectacle lens wear. The reason for this is…primary lenses are ‘load bearing’ lenses, surfaced to a 2.2 mm minimum thickness. In our system, all layers subsequent to the base lens are surfaced to a .9mm thickness. In terms of lens evolution, what this means for eyeglass wearers is the ability to add and remove a particular lens layer to suit several different applications.

Some have asked, ‘but wasn’t this available with prior magnetic and clip on products?’

When this process was attempted with prior products, full lens thickness layers were required. In this case the weight of the secondary lens and secondary frame front becomes too great. Trying to place a lens with a thickness of .9mm into an eye wire configuration doesn’t work well either, so something new had to be created.

What we have created is a magnetic layered lens of .9mm thickness that matches the base curve of the base lens. By making the lens layers from polycarbonate or Trivex in a rimless format, the Chemistrie lenses are universal and transparent on the original frame style. Chemistrie .9mm layers are thin and lightweight so as not to affect comfort, cosmetics, or performance. Shape and Base Curve Matching with lab expertise applied, results in a quality customization.

This presents a new opportunity. It provides the flexibility to add, combine, or remove a bifocal line or progressive segment, or photochromic or polarized layers, easily. An entire range of adaptations and wearing options are now available, meaning multiple lens sales for labs, and ECPs.

For labs, a Chemistrie order would work like this. The first tray is for the primary Rx or base lenses. With CnC Drilling, a blind hole is placed in the lens periphery. This is where the small magnets will be placed. While the frame is apart, and the tracing has already taken place, the lens is then invoiced with a second and third tray. Most likely this second tray will contain a polarized lens layer, our best selling product. A second or third tray may also contain surfaced AR-coated .9mm layers for photochromic or power addition layers.

The lab is able to multiply the work up and reduce duplicate work because the layer is made at the same time as the initial order. In case of repeat orders, or additional layer combinations, the lab can simply pull the tracing and data points from the archive, and produce the layer, made to order, completely from memory. This results in increased repeat orders for the lab.

Current data suggests about 12 percent of eyewear purchases involve a second pair. Chemistrie is a more cost effective option, primarily geared to those not wanting the expense or the bulk of a second pair of frames. This is a new opportunity for the patient in terms of options.


Lens finishing equipment provider, Santinelli International, has recently introduced exclusive lens edging software “Click Mode” that will give wholesale labs the ability to easily create customized Chemistrie Sunlenses. With a push of a button, the software adds the magnet hole and the bridge positions. The operator can select the style of the magnet—round or square. The Click Mode software combined with Santinelli’s ME-1000 will edge and drill the Rx lens and the .9mm layer of the Chemistrie lenses.


Labtalk June 2020