mewsician
Don't know anything about Ivermectin for humans, although I give it to my cat monthly. I read, just today, since I am having an outbreak of demodex (my 4th in 2 years) of its use here:
http://emedicine.medscape.com/article/1203895-overview.
This website is hard science.
Pay particular attention to the baby shampoo treatment shown on that website. I have used that with success twice (I added a couple of drops of tea tree oil, since it is apparently now known that tea tree oil kills demodex. You just have to be diligent). Treat your whole eye lid, up to and including your eyebrows, and the space between your eyebrows. Search for Eyes 'n Mites on the internet, a natural substance by Naama, Ltd. That works, too. I think I'm getting these demodex from my cat, and I'm going to talk with my vet in a day or so.
You MUST change your pillowcase every day, and your sheets, too, if you're having a severe outbreak. Face cloths, too. I did this for two straight weeks on my second outbreak, and I thought I was cured. Still think I was, but I'll talk with the vet about that.
I wish you good luck. There seems to be some agreement now that rosacea may be caused by demodex.