I’m just guessing based on my own experience, but at a prescription of -12, prescription goggles may not be cheap, and they may not even be available.
I’m in the same boat as dangermom - one eye is -11 and the other is -12. Daily functioning isn’t that hard; you simply learn to ALWAYS put your eyeglasses in the exact same spot at night.
For me, price and availability of corrective lenses have been the biggest hassle. I wear contacts whenever I can (when soft ones first came out they weren’t even available in my prescription, but now it’s no big deal), but of course I need eyeglasses too. They have to be hi-index or they’d be about an inch thick. Okay, “an inch” is exaggeration, but not much. Even the thin hi-index lenses are so thick that the beveled edges have bevels to make them look a little thinner.
Plus, I need bifocals, and prefer the nicer-looking progressive lenses.
Then, there are all the bells and whistles that either you want to be added (shatter-resistance, anti-scratch coating) or are required by the manufacturer/law to add, like UV coating - last time I bought eyeglasses, in Texas, the optometrist said I was REQUIRED to have the UV coating in my prescription, although I’m not clear on whether the requirement was from the manufacturer or the law. I have nothing against UV coating, but it deteriorates in about 2 years, meaning I will have to buy new glasses.
Bottom line: using the cheapest frame available, my last pair of eyeglasses cost me around $900. Let me stress, that was NOT because I was getting fancy designer frames by Dior or some such idiocy - I got the cheapest frame available that fit my face and would hold my thick lenses. No, that was over $800 for the lenses alone.
I would very much like never to buy glasses again, but because of the annoying UV coating issue, I’ll probably have to.