Dōjutsu

are genetic ninja abilities that utilise the eyes, granting the wielder ocular abilities. Being a by-product of specific kekkei genkai, dōjutsu are not classified as one of the major jutsu types. They do not require the use of hand seals and in some cases facilitate in the use of or defence against genjutsu, taijutsu and ninjutsu and then defeat their opponent. All known dōjutsu also provide the user with some unique abilities, such as an extended field of vision or predictive capabilities. The use of dōjutsu often-time consumes a great deal of chakra.

By transplanting the eye in question, it is possible for people to possess the dōjutsu, despite not being in the clan that the dōjutsu originates from. Among all known dōjutsu, there are three that are known collectively as the.

Known Dōjutsu

 * Byakugan
 * Rinnegan
 * Sharingan
 * Sharingan ancestor
 * Ranmaru's Kekkei Genkai

Possible Dōjutsu

 * Zetsu has shown the ability to manipulate his range of sight allowing him to see over vast distances in a manner similar to the Byakugan. It helps Zetsu to analyse enemies from the distance and allows him to serve as a lookout whenever the Akatsuki members are assembled. Whether it's ninjutsu or an inherent ability of Zetsu's is unknown however. Also, Zetsu's eyes can "record" events and store these "records" for further viewing by others, this is why he is often-time sent to battlefields by Tobi.
 * In Naruto: Shippūden the Movie, a high priestess from the Land of Demons named Shion has the ability to predict a person's death. When she sees a prediction of someone's death, her eyes take on a flourish design, which makes it a possible dōjutsu.
 * In Naruto Shippūden 3: Inheritors of the Will of Fire, the major antagonist Hiruko uses a technique that controls a person's mind, seemingly through eye contact to create the original connection. However, it is not confirmed that the user's eyes or even eye contact is needed to set this technique, so it is unlikely to be a dōjutsu.

Inspiration
The concept of dōjutsu may have been inspired by Futaro Yamada's 1959 novel,, which featured two warring clans of ninja that had developed mutations and abilities through selective breeding, with the young heirs to each clan possessing mysterious dōjutsu.

Another possible inspiration for dōjutsu in the series may also be found in the Journey to the West classic's titular character, the Monkey God-King, Sun Wukong: After having eaten all of the 'peaches of immortality', the 'pills of longevity' and drunk all of the 'wine of immortality', and then was captured after a long rebellion against Heaven, the Monkey God-King, Sun Wukong, was then sealed into Lao Tzu's Eight Trigram furnace to be burned to ash in order for Lao Tzu to reclaim his pills of longevity. But after 49 days, Sun Wukong broke out--stronger than ever--his body having been refined by the flames instead of being reduced to ash, His eyes had also become a fiery red and golden colour, becoming known as his ; an eye condition that allowed Sun Wukong to now see what's really there just by looking and the ability to see and recognize the real form of evil despite whatever form that it took on — but, likewise, it also gave him a weakness to smoke, fogging his vision.