As I mentioned only very recently on here, I had a bad experience with a superglue only a couple of years ago when some fumes got into my left eye. It now frequently feels slightly dry and uncomfortable so I know I did something. Unfortunately I still believe that superglue is an excellent glue and I have not stopped using it in three different densities, however I am now significantly more careful when I use it. The challenge I had was when using the very thin type when it wicks quickly into an absorbent material such as tissue, cotton cloth or rope. Under those conditions it suddenly gives off a white vapour which is very toxic.
Consequently I don’t get my face too close, I keep the windows open and I avoid using the thin on an absorbent surface. I’ve never had a challenge with the thicker viscosities. So basically I’m just more careful but still use cyano.