The curse of the evil eye is essentially one of the reasons why the narrator in "The Tell-Tale Heart" is frightened by the old man's gaze and chooses to kill him. This curse have been known to cause fear in many cultures in the world, including Islamic belief.
The credibility of the evil eye can be found in plain Islamic text and is deemed an ominous curse on the person to which the eye looks upon. In one of Ibn ‘Abbas’s message from the Prophet Muhammad, he relays that the eye “is a fact” and the curse of it “precedes [even] destiny.” (Sahih Muslim, Book 26, Number 5427). The melovance of the evil eye is caused by a jealous gaze followed by a seething compliment from another, thus invoking a curse upon the envied. Even in the Qu'ran, it speaks of seeking refuge under the Lord from the “evil of the envier when he envies” (Chapter al-Falaq, verse 5). Practices of warding of the curse or preventing the curse is the use of amulets for protection; and instead of compliments of direct admiration, Muslims say Masha'Allah, "God has willed it." Thus, they avoid inadvertantly or unintentionally cursing friends, family, relatives, or strangers.