Association of Technical Opticians

Commonly used in the lab the segment inset will vary depending on the power, center of rotation to cornela apex, vertex distance, and working distance. This excel sheet will allow the user to input the correct variables and compute a more accurate inset. This came about from hearing the commonly used “just subtract 3mm from the distance PD”.

Segment Inset Table (xls file)

I thought it would be fun to put together a little book that anyone here could print off. Print the first file (Frame Adjusting.png) first then flip that page over so your printing onto the back then print the second file (Frame Adjusting 2.png), now you want to cut them sheet into 4 pages:

• 16 - 1
• 14 - 3
• 12 - 5
• 10 - 7

Now that you have your sheets cut we’re going to make a pile in the reverse order of the sheets above. Place the 10 - 7 so those numbers are facing the top down first, then place the 12 - 5 on top of that one again so the numbers are facing you, then the 14 - 3, then the last 16 - 1. Now if you fold those sheets in half so that the 16 - 1 is both your cover and your back page you have a little booklet that you can give to your employees to throw into those lab coat pockects for quick reference. It’s free to pass on so have fun.

Bench Align (zip file)

Update: Thanks to Judy Canty for the editing.

Here is a microsoft excel sheet that allows you to create a tschernings table fro corrected curve lenses. The index and vertex distance parameters are adjustable and the lens desings available is a point focal and a percival design.

Corrected Curve (zip)

Darryl Meister technical marketing manager for Carle Zeiss Vision has created one of the most insightfull tools that I have come across in my time as an optician. This is a must have for any opticians arsenal, thank you Darryl for a very well thought out and powerfull tool.

Spectacle Optics BETA (zip) from: www.opticampus.com

Since Alvaro Cordova created the Isekonic lens calculator, found at http://www.opticiansfriend.com I have wanted to create one of my own. Call it envy, but a few weeks ago I had a scare that the caculator was no longer there, the reality was that I just didn’t look hard enough for it none the less it spurred me to create one of my own to share although nothing is as good as the original. So here is a link to both.

Isekonic Lens Calculators
Opticians Friend Calculator (the original)
Newly Created Calculator