Edge thickness

**DocInChina** · 10-20-2007, 06:26 PM

I am looking for drawings showing the following:

1) edge thickness comparisons for same Rx but different index lenses
2) edge thickness comparisons for same Rx, same index but different SV designs (spheric, aspheric, atoric)

Does anyone know any online source to see this? Thanks for the info.

Doc

**Fezz** · 10-20-2007, 07:34 PM

You may want to try Seiko. I think they use to have something like what your looking for.

Try:

www.seikoeyewear.com

**gemstone** · 10-20-2007, 07:37 PM

Right Fezz, Seiko had a placemat, Sola had a book compairing spectralite to other materials. Call some lens suppliers.

**renee1111** · 10-24-2007, 04:16 PM

Nikon has a great three page fold out with all refractive indices. Call your rep or your lab and they should send one to you.

**ilanh** · 10-25-2007, 05:27 PM

I have the seiko place mat and it's very good. It's made from a soft mouse-pad like material and is very descriptive. Patients instantly understand the demonstration.