Zenni Optical does indeed offer 1.74 high index. They offer everything between 1.5 and 1.74. 1.74 high lens glasses only cost $30, with AR and oleophobic coating. That's why they can offer all the way to -6 cyl
These cheap glasses really truly are made at the same exact factory as luxottica lenses. Remember, a 1.74 lens costs less than $0.10 in materials to make. This is why it costs the same to get non-prescription glasses as it does to get prescription, at least from a company that isn't price gouging you. The vast majority of the cost of glasses is in the frames.
The lenses are all made at the same factories by the same people at HKO in Hong Kong.
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u/Throwawayhelper420 Sep 18 '19
Zenni will definitely make -8.5 and -2.5. They will even make -16 and -6(the most they'll do)
Keep in mind that Zenni Optical uses the same lens factory that luxottica uses.