Selam 8pider,
In my home country the 'evil eye' is understood to be someone's staring that has the power to cause you harm. I guess it has the same meaning among all the cultures and religions where it is accepted as real, existing phenomenon. I've seen brides and newborn babies being given a necklace with a blue eye medallion, because it is believed that the blue eye keeps it away from you. If the bride feels tired from the wedding ceremony, she was hit from evil eye, the long ceremony had nothing to do with it. If a child steps on a rock and falls down, he/she caught the evil eye from someone who stared at them, stone had nothing to do with it. And so on. My point is, it is something purely superstitious. I've seen the Quran mentioning the existence of black magic (blowing of knots and similar), but I haven't seen anywhere the mentioning of the evil eye phenomenon, or how to be protected from it, like it is the case from the evil of those who blow on knots. If it is there, I have yet to see it.
God bless you,
Your sister Seraphina