regular plastic in drill mounts?

I've been having a bit of trouble adjusting to the trivex lenses in my
drill mount frames and the office said they can have the lab put
regular plastic lenes in these. Some labs won't do it and others will
do it but with a shorter warranty period. I've always heard you HAD to
use high index, stronger lenses with drill mounts due to splitting or
splintering. Any thoughts? So far I'm a bit hesitant but I do notice
the difference in optics vs. my normal lenses.

.

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