Assalamu alaikum

Thank you for your question. Nazar is not from the Islamic issues, rahter it is based on strong cultural norms and practical experience. According to thr experience of many people, There are some people owing to their their distinctive traits may be caught by an evil eye. It has nothing to do with with an established Islamic view. It is not allowed to wear or tie something for the sake of protection. We have to depend on the Quran and dua which is the best protection.

Wassalam