You are right, Deepa. I suggested them for normal Dhrishti (Evil Eye). Also this will serve as a general maintenance for every family.
But if the problem is little severe, doing some special pooja and reciting Lalitha Sahasranamam / Hanuman Chalisa, etc will work.
If the problem is even more severe, even these things won\'t workout. For that doing a Ganapathi Homam / Sudharsana Homam in the house will solve the problems. I\'ve suggested the same in some other thread too.