Hello,
we are slowly but steadily approaching the fourth wave of the pandemic here in Europe. In the last year and half we had to do quite a few glasses for people in retirement homes who were not able to come in person. I have a question about OC height.

What have we been doing:
1. Reading glasses: 50% height
2. For distance: 2mm above 50% height
3. Multifocals: just guessing

As expected we had some hits and misses with multifocals. Sadly I'm sure we will have to do some more of them because of the times ahead. I'm curious if you have any recommendation on OC height for customers who we can't measure in person and have a complicated prescription. Is there a rough formula that we could guesstimate better for PALs? How do the online retailers do it?

Thanks, Marin