FAQ / Help / Calculators


Q: Where is Amanda from?
A: She’s from Lee County, Virginia.


How to Measure for a Multifocal


We use these things every day. Rather than hoard them in our own private Excel spreadsheets, we’re sharing them with the world! P.S. The world may not find them very useful. When processing lenses in the US, we make some assumptions about index of refraction that seem crazy to the rest of the world.

Aniseikonia Calculator

Diopters to Radius of Curvature Calculator

Transposition Calculator