Ash-Shaykh Yahya al-Hajooree, may Allah preserve him, was asked the following question
How does a person know if he was afflicted with the evil eye?
He can possibly feel a change in his living conditions. For example, he becomes sick, and it is from one condition to another such as if he wasn’t ill, (and) then became ill. Or, if he were to have a good eyesight, then he gets afflicted with bad vision. Or, if he were to have a good memory, then he gets afflicted with bad memory. (All of) this is a sign that he got afflicted by something. And if it is due to the cause of the evil eye and its likes, then let him treat it with the dhikr of Allah
Transcribed from the following audio on the time 10:10 and up:
The scholars mention usually the women and children are victims to the evil eye and to magic. Further, Allah describes the evil eye of the Kufaar towards The Prophet sallahu alayhi wa salam,
( وَإِن يَكَادُ الَّذِينَ كَفَرُوا لَيُزْلِقُونَكَ بِأَبْصَارِهِمْ
“And verily, those who disbelieve would almost make you slip with their eyes through hatredness when they hear the Reminder (the Qur’an)”