Today I placed an order for glasses (sph -3.00&-2.50, cyl -0.50&-1.75)
with 1.61 index lenses and then came across this post and decided to
call since my order had just been placed and maybe I should make
sure. Nowhere on their website does it give any indication that
selecting 1.61 or 1.67 lenses was subject to sphere/cylinder
restrictions.
I had to redial about 12 times in rapid succession until getting the
hold music, as caller 12. A positive is that the hold music says what
caller number you are. At 31 minutes into the hold I was caller
number 1, next in line.
Call was answered by a person at 33:21 minutes into the call. I gave
my order id and noted that I'd seen a post that Zenni doesn't use
anything but 1.57 index lenses for sphere/cylinder under 5. She said
that's correct, and explained that if you're worried about lens
thickness at such a low sphere then you should choose a narrower
lens. She looked at the lens width of the selected glasses on her
screen, noted that it was nowhere near the need for a higher index,
and said she'd let the lab know and refund the difference. I was on
the call less than 1 minute after she answered, and she was very
helpful.