I have been wearing Optivisors for many many years. When I stone set
a #5 is a good lens strength to use. It is right in the middle of
lenses they make for the unit. I also have prescription glasses that
help me read and do close up work not jewelry related. I further
inspect my work with a 10 power loupe.
If I am doing small stone such as.01 point diamonds I go to the
strongest lens #10. You might need a little stronger lens if you are
When I teach diamond setting, the first consideration is weather you
need glasses for this type work. If you can’t see what you are doing
without glasses, have your eyes checked first by a doctor.
I also use the Optivisor for general bench work. I use a #4 for all
jewelry as well as polishing.
Here are my ergonomics for magnification. It starts at the bench. I
sit and work in front of my bench with the table top at about
shoulder height. The jeweler’s bench drawer allows me to rest my
elbows on it for comfort. You need to be able to work comfortably all
day at the bench. The bench pin is right in from of my face. I set
mostly with a ring clamp to hold my jewelry. Many setters use either
a Graver’s Ball or a Benchmate. Either needs the same distance
Start by measuring from your nose to your work. The Optivisor is
basically sold by distance. A #5 is about 8 inches to clarity. They
used to have a chart showing the lens number and distance to your
work. See if you can find one of these charts. You should be
comfortable seeing what you are doing.
I also have found used ones that I have replace parts on. The news
ones are quite round and take a bit of time to break in. My head is
not round but a bit of an oval when it comes to fitting the
Optivisor. I have hat hair all day, but who cares?
My two cents…
Southeast Technical College