I don’t know anything about the eye and the chamsa.
As I mentioned, Rav Yaakov Hillel does in fact decry this practice. I have heard other Rabbanim do so as well.
I also wonder why the Rabbanim do not take a more public stand about certain prohibited practices which have become unfortunately not uncommon. One example is that in the past ten years or so, I have seen an increasing number of otherwise frum men who shave their heads completely, or who trim their hair so short that it is under the minimum length of פאת הראש.