My eyesight is -7 so pretty bad. For offroad I use daily contacts and sunglasses for everything but flat pootles. Rain, mud, sweat and steam can be bad offroad and you need to be able to see the obstacles so I don’t want to rely on specs that I may not be able to see out of.
If I’m doing a short road ride used to used old specs but they didn’t have much coverage so my eyes watered a lots – so much so one of the tear ducts got infected and my eye watered 24/7 for most of last winter. I’ve now invested in some Adidas Evil eyes with RX inserts, I’m right on the prescription limit for RX inserts (the direct glazed limit is lower) so there is a tiny bit of distortion but get used to that after a few minutes. They are stupidly expensive though and I wouldn’t want to use then offroad if it was wet and gritty – for the reasons above as well as not wanting to ruin them.

I’ve now invested in some Adidas Evil eyes with RX inserts, I’m right on the prescription limit for RX inserts

I have a pair of those too. Expensive and the jury is still out, I find they wobble. So old specs for me.

As I wrote earlier, my prescription is -11/-10.5.
I use Rudy Project Maya frames with the RP photochromic clear lenses which are ace. I also have a pair of 15% dark lenses which are waiting until I go to Italy in July to try out.
I’ve tried quite a few lens systems and the RP one is the best IMHO for high prescription cycling glasses.
Having an interested and understanding optician helps – I’ve explored several things with my optician which they’ve then gone on to feed back to both the frames manufacturers and the lens fabricators, to the point where they were runners up in the sports specialism field at a Pan European awards a couple of years ago.

Change your optician. There are loads of sport frames out there now, which can be glazed. I got these in varifocal and photochromic from my optician and they’re fantastic:

(These can take a fairly extreme prescription thanks to the separate sub-frames that actually carry the lenses.)