I can certainly empathise with what you are saying but please don't think the worst if you are told you have PD. There are so many new different medications on the market and maybe they will change your glasses prescription.
I had Acute Glaucoma in both eyes 28 years ago so had two ops. Then more recently, 2 Cataract operations in both eyes, followed by laser surgery early last year. I also have a prism for my right eye. I've had PD for 16 years and I'm on tons of drugs (bit of an exaggeration but not much) and of course, the ApoGo pump.
It's bl. .dy difficult I know but until you get the results, keep calm and only deal with one problem at a time.
All the best to you.