I have had a Blepharoplasty. One thing you need to check though is whether you need that only that or whether you need ptosis repair. Blepharoplasty removes tissue usually skin, muscle, and fat. The eyelids though stay where they were. If your problem is loose skin that hangs over your eye impeding vision then the blepharoplasty will help with that.
On the other hand, some people have an actual drooping eyelid. The eyelid itself has sagged down so that it can impede vision due to the sinking of the eyelid. This calls for a ptosis repair.
I had a cosmetic blepharoplasty because I had lots of loose skin on my upper eyelid. I also had a tendency to hooded eyelids. I do have a slight ptosis on one eye (not enough to impede visions -- basically no one but me and a surgeon would notice it). My plastic surgeon would have referred me to an oculoplastic surgeon if I needed ptosis repair. However, mine is not severe enough to need it.
So -- some people can get Medicare to cover a blepharoplasty if the skin droops down enough to impede visions. And, they may not need a ptosis repair at all.
Some people need only a ptosis repair and a blepharoplasty won't help them. Some people need both. The point is that if a ptosis repair is needed a blepharoplasty alone won't be enough.
Here is a webpage that explains the difference and shows photos of what a ptosis of the eyelid looks like.
The difference between ptosis repair and blepharoplasty | Joseph Walrath, MD
Now as for blepharoplasty. I did have it. The recovery was easy. I had it during a facelift so I had other things I was recovering from. For the first few days after surgery I had a lot of swelling around my eyes and everything was very blurry. There was not a huge amount of pain. There was a lot of bruising. I was very happy with the results (this was a couple of years ago). I did end up having a slight revision several months after surgery. On one eye I still had loose skin. It had not all been able to be removed in one procedure (in my case I was also having cholesterol deposits on my eye removed and the surgeon had to be cautious on removing too much eyelid skin in one procedure as it could have cause my eye to pull down -- most people wouldn't have that issue as they aren't having other things done to the eyelid area).
If it’s really obstructing your vision or causing other medical issues, then it obviously needs to be done. My friend had it done for cosmetic reasons and went with a surgeon her dermatologist recommended. Now she has a small permanent lump on the outside edge of the skin surrounding her eye. If I were her, I’d be very bummed about this.
She might need a revision. Sometimes a suture doesn't dissolve and it can form a lump and needs to be manually removed (I had that issue). In the meantime it is like a tiny lump. The surgery removed it and it was all fine. But, I agree with the larger point. Research, research, and research the surgeon. Then, research some more.