Serious question about dog cataract surgery

OK, so, first my little girl is 15 years old. A couple years back, she began developing a milkiness to one eye. I took her to the vet who told me she surely had a couple more years of progressively worsening vision before it needed to be addressed...especially considering her age.

The last 2 years have not been kind. Not only is she going blind, but seems to be going deaf, too, as she no longer turns directly toward me at the sound of my voice, I have to be kinda loud, and then she's looking around, searching for the source of my voice. Otherwise she is in generally good health.

This little one has been my very best friend and constant companion for my entire life, it seems like, but factually, I only got her when she was 5. Her original owner, who loved her dearly, had a situation in that her living arrangements got intolerable and she had very limited options...so she gave toe little one to her ex-husband, who was also her only child's father. He also was a great doggie daddy, but he developed lung cancer, and his biggest concern was finding the little one a good home. Which is where I came in. So, the little dog has never been neglected, abused, or any of that heart-rending stuff you see in click-bait ads. But, I think it's time to revisit the cataract surgery option.

So, now I have this little. old dog, who means the world to me. I myself will need cataract surgery before too long, and I can feel the difference in my own vision, so far it's mostly annoying, but it's getting to the point where it will need to be done. And, my opinion is that her own eyes need repair, sooner than I'd thought. She still navigates the house and farm fairly good, but has fallen off the bed a couple times playing her favorite game of running around the perimeter of the bed at full speed, terrifying me with her sharp turns, etc. I watched a couple videos on you-tube, but those people had some difficulty with the language, and I lost a lot of what they were saying.

Anybody here had any experience in this? I gather that they'd do the worst one first? One of the things I found worrisome about the video I watched was, apparently one of the dogs ended up wearing the collar of shame for weeks on end, since she kept scratching at her eyes. and would her age make her not a good candidate? She DOES develop phantom itches and stuff, and from time to time I've had tp put socks on her to keep her from chewing at her feet, of an ace bandage to keep her from chewing at the top base of her tail. So, no doubt she'll be a candidate for excessive scratching and rubbing.