Reddit mentions of Healingshield Watch Face Protector Guard [Front 3pcs] (45mm(1.77in))

I almost always use glasses with my O+, and from a comfort perspective / ability to see they work fine. It is definitely possible for your glasses to rub up against the lenses and create an ugly scratch though. But there are options to protect your device. Most obvious being just use contacts, but...

You can try the typical lens protectors type of thing. That way if it starts to rub you can replace them. I'm told that this one works well for the Odyssey. (Note while I have these, I haven't actually tried them yet, so I can't confirm.) https://www.amazon.com/gp/product/B00SJ22D1U/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

You could get custom lens adapters which you install over the regular lenses and which have your prescription built in. This is what I'm planning to do longer term. https://widmovr.com/product/odyssey-prescription-lens-adapters/

You could add a spacer to the headset to push your glasses back and away from the lenses while you use it. I used a 3d printer to make mine and attached them to the inside of the headset using blu tac. If you don't have a printer you can order one from the many 3d printing services, or just use something else entirely to accomplish the same thing. I saw a reddit post a while back of someone using a wadded up microfiber cloth to do this. (Can't find the post off hand sadly.)

Thingiverse 3d print stl: https://www.thingiverse.com/thing:1839426

And of course if you do get a scratch there are lots of threads about how to buff it out using various methods. I haven't had to try any of those yet, so I can't say how well they work.

The solution to your problem sir!

https://www.amazon.com/gp/product/B00SJ22D1U/ref=ppx_yo_dt_b_asin_title_o02_s01?ie=UTF8&psc=1

Used these on the odyssey+ and they worked PERFECTLY!!!! I went with the 45mm's and they were a bit big on my O+, I'd drop down to a 44 if I were to do it again.

He is suggesting Lens Protectors not prescription lens inserts. Films that go over the lenses like are commonly used for phones. Such as these HealingSheild curved watch protectors that many on this sub use and are listed in the sub wiki. I do not know the proper size to get for the GO/Quest. 44mm and 45mm work for the Rift.