Zenni's 1.57 vs 1.67 HI

[MegDo77]

I just received my pair of rimless glasses from Zenni's. Very
impressed with the how quickly I received them. Only took 7
days....and I live in Canada!

My only concern is the thickness of the lens. My older pair of
rimless were very thin. These ones are thicker by about 1mm. Should
I opt for 1.67 High Index lens next time and pay the extra fee of $37
if I want a thinner lens?

My prescription is as follows (not quite sure how it works):

+0.75 -1.75 90degrees
+0.25 -2.00 80degrees

Any suggestions would be appreciated.

[J. Evan]

I would think no one here would advocate that you should up for the
1.67 lenses with your easy level of correction. You have a very mild
reading prescription with a moderate amount of astigmatic correction -
very easy and almost certainly done with stock lenses.

Zenni seems to use their own special 'blend' of polymer lenses, which
don't seem to conform to Opti Campus thickness calculations. With my
two pair of supposedly 1.67 lenses from Zenni, the center thickness is
1.2 and 1.4 mm thicker than my B&M 'real' Seiko 1.67 lenses - despite
nearly identical widths - an unexplained Zenni phenomenon...

I would chalk this one up to, "you get what you pay for" with Zenni.
You might want to try another vendor for a comparison pair - try
someone like Global Eyeglasses or LBW Eyewear in their cheapest lens
of the same width as your Zenni pair and see if the thickness is the
same - I suspect they won't be.

Then again, your previous pair of rimless might have come from a chain
B&M store, which usually blindly spring for Polycarbonate lenses,
which will be thinner than the standard 1.56 index lenses...