In his 'Israel and the Prophecies of The Holy Quran' Akbar Ali states: 

"Our Prophet (peace be upon him) informed his followers that when the time comes and they hear that Dajjal exists, that they must recite the first ten verses and the last ten verses of Surah al-Kahf (The Cave)..." 

Those who recite these verses will be saved from the mischief and tribulations of Anti-Christ, providing that the reading of these portions of the Qur'an are made with a clear understanding of their meaning. Akbar Ali elaborates: 

"The reason why the Holy Prophet Muhammad (peace be upon him!) advised his followers to read these twenty verses of the Qur'an was because these verses speak of the Christian misbeliefs, and, therefore, there is not the least doubt that the tribulation of Dajjal means the tribulation of the Christian nations or the materialistic civilization, with which we are faced in the present age. And the name of Antichrist given to it is due to the fact that it is opposed to the true teachings of Jesus Christ, who never taught the doctrine of sonship, and neither did he teach the doctrine of atonement. The Holy Qur'an gives a clear warning against such a belief."

He states that one of the purposes of the advent of the prophet Muhammad was: 

(1) To warn those who say Allah has taken to Himself a son.(Surah 18, al-Kahf, ayah 4)

(2) Do those who disbelieve think that they can take My servant (Jesus) to be master besides Me? (Surah 18, al-Kahf, ayah 102) 

(3) Say: If Ar-Rahman [The Beneficent] had a son I would have been foremost among the worshippers. (Surah 43, Az-Zuhruf, ayah 81)

and 

(4) Those whose effort goes astray in this world's life, and yet, they think that they are making good manufactures. (Surah 18, Al-Kahf, ayah 104) 

that is, to point out to Dar Al Suna  (for its English rendition read Arsenal)  The House of Industry, that those nations who excel in manufacturing, to the exclusion of all other considerations, what the result of all their artifice will be in the final analysis.  

After quoting the Hadith in al-Bukhari: 

"When Dajjal appears, his complexion will be white and his right eye will be blind, while the left eye will shine like a bright star." 

Akbar Ali makes the following observation: 

"First of all, generally speaking, the European nations are the only ones with white complexions. And the mention that the right eye would be blind does not mean physical blindness but spiritual blindness with no thought of life beyond the grave, and the [covetous] left [sinister] eye shining like a bright star means that they would discover all kinds of earthly treasures, comfort and luxury to such an extent that their spiritual life would be completely neglected by them. Our Prophet said on occasions that man's right side was heaven and the left side hell. Therefore the brightness of the left eye stands for love of life and luxury which will divert man from the right path and take him to hell. The Holy Qur'an makes the point quite clear when it tells us in the following words:

'Whoever is blind in this world will be blind in the Hereafter.'" (Surah 17, Al-Isra', ayah 72)

However, Akbar Ali also warns Muslims about blind belief without understanding: 

"Some Muslims believe that if they recite the Quranic verses relating to Dajjal and he hears it, he (Dajjal) will run away from them in fear. But I do not think that any sensible person would ever believe that the mere recitation of the Holy Qur'an could turn anyone away in fear. This is simply another of the ancient superstitions which, sad to say, still exist today. The real sense in this belief lies in the fact that their meaning should be understood, for only by understanding the meaning of them can Dajjal be identified, and, with this knowledge and understanding, man can protect himself from the corrupt and misguiding influence of (The Great Liar) Dajjal (the Anti-Christ), such as the belief in the sonship of the Prophet Jesus..."

It is clear that there is much to consider in this matter of Dajjal, and it is incumbent on us to make the effort to satisfy ourselves that we are doing all we can to improve our understanding, without becoming paranoid by wasting our time on matters which should not concern us.