Hello; The short answer is yes it is not a good idea to mix more than one medication at the same time.
I am still assuming you are treating ich with high temps and salt. So do not treat with a second medication. As suggested, clean water by WC and keep the salt concentration at the effective level.
I am also assuming you are treating a large tank with other fish in it. Adding a second medication can be hard on all the fish and is uncertain to help the cloudy eye. My guess is that fish has lost the sight in that eye regardless.
The exception can be if you are going to treat the fish by itself in a separate QT (quarantine tank). Still a good chance that double dosing with more than one medication will do more harm than good.
All that said I get the impression you are cherry picking the suggestions that have already been made and apparently do not like some of them. This is because you are essentially asking the same question again. It boils down to the fact we each get to run our tanks any way we wish.
Good luck anyway.
I feel like we are beating a dead horse to get it to move.....
Sorry for asking basically the same question....so it's safe to assume that he won't regain his vision in that eye and let the salt do it's thing as a mediator along with clear water.
Can I also assume that these fish are azul as mention before??
Fish look to be azuls, I would be more worried about getting the fish healthy than what type it is, if you lose it by not doing as suggested then it doesn’t matter. Depends how bad the infection is in the eye but more than likely he will be blind on that side

