Ugh, parents.
I really don't understand why parents have to act like their kid is a burden or find connections between something and a fault that science literally will show you doesn't exist. The tech thing is such a stereotypical parent vs kid thing.
Being a teenager can be rough with treatment like that all it takes is one toxic individual that you gotta depend on.
I've been blind since birth, but my genetic disease, norries, is eating away at my hearing too. I have no clue what I'll do if my hearing goes.
Its not quite the same but it is in the fact that you use your sight to do a lot of things, probably a lot of visual things too even more so depending on your hobbies, my ears I would say are just as important to me as your sight is to you.
There are treatments in the works, I can't remember things specifically about vision but I did dive down a rabbithole once because I was curious about blind people who were actually able to see again.

I'm sorry, this does sound terrifying. The appointment will help to understand what's going on and what there is to help with the situation. I can empathisize. Good luck and let us know how you make out.

Edit: And none of this is your fault, none of it. Your mom is scared and looking for something or someone to blame but this isn't your fault at all!

Your not to blame! I’ve had people blame me for my bad eyesight even though I was born visually impaired. You can do this! Just keep posting on here for support and advice because we’ve got your back.

That's crap, your phone did not cause your eyesight stuff.

I was born blind so can't imagine what you're going through but i hope you're able to enjoy life in the future, there's tun of tech out there these days compared to when I was young, it probably won't be easy but you'll still be able to enjoy things.

Nope. Not your fault at all. Make sure you’re seeing an ophthalmologist and ask all the questions.

I agree, slowly going blind is terrifying. I lost most of my vision between ages 13-15, and I was scared out of my mind. I was also very depressed for a number of years because of the trauma. I found therapy really helped me, maybe it would help you with the actual vision loss and your mom? It could be she doesn’t know how to handle it and is unfortunately taking it out on you.
Also, it is in no way your fault, please remember that!

Is it your retinas or your optic nerve or the lens making things blurry?

If it’s the lens you can get lenses implanted that have corrections in them so you don’t even need glasses.

They can even do them multi focal now.

https://www.eyecenterrockies.com/the-pros-and-cons-of-multifocal-intraocular-lenses-iols/

Not sure if this is relevant to you.