The Sharingan is one of Kekkei Genkai that naturally occurs in a select few members of the Uchiha clan. When the user is in a life-threatening situation, Sharingan usually appear to save them. Only few person that possess the Sharingan, some of them are Sasuke Uchiha, Itachi Uchiha, Kakashi Hatake, Madara Uchiha and Madara's brother. The power of the Sharingan is judged through the number of tomoe in the eye, with a maximum of three in each.
Sharingan's Level
The Sharingan's first level and most well known ability is to memorize any technique that it witnesses. The user pupil will turn red and develop one of the wheel swirls. It can memorize any standard form of jutsu with perfect accuracy, allowing the user to use the techniques as his own. Based on Naruto storyline it was released when Sasuke for he first time fight againt Rock Lee taijutsu. Sasuke make some copy of Lee's move and show it when he fight Akado Yoroi, even he is able to modified with his own move.
The Sharingan's second level ability is granting the user incredible clarity of perception, allowing them to track fast-moving objects with ease and even predict the subsequent movements of those objects. The user pupil will turn red and develop two of the wheel swirls. This second levell was show up when Sasuke took Chunin Exam. Sasuke was able to reproduce answers on another person's test by watching their pencil movements and copying their answer.
The Sharingan's third level capability is a unique brand of hypnosis that involves suggesting actions and thoughts to the opponent. The user pupil will turn red and develop three of the wheel swirls in both eyes. In this level the user can read Genjutsu, Taijutsu and Ninjutsu, learn how the skill is done and then copy it to be used later. This allows the user to perfectly mimic every move their opponent makes, even before they do, making it appear as if the user can see the future.
The last level is
Mangekyo Sharingan, it is a heightened form of Sharingan. Madara Uchiha become the first person which awakened Mangekyou Sharingan. Then his brother also awakened Mangekyou Sharingan. With that power both of them be the strogest person in their clan. Mangekyou Sharingan was able to use it to gain control over the Nine-Tailed Demon Fox. After Madara and his brother only three person could do the same thing, they are Itachi Uchiha, Kakashi Hatake, and Sasuke Uchiha.
Sasuke Uchiha's Mangekyou Sharingan
Sasuke initially caught a glimpse of this version of Itachi's Mangekyou which differed from his later version.
Itachi Uchiha's Mangekyou Sharingan
Itachi was able to finally master this form during the period he killed his clan. Itachi get this Mangekyou Sharingan after killed his closest friend. In this form Itachi is able to use the Amaterasu and Tsukuyomi Doujutsu techniques.
Kakashi Hatake's Mangekyou Sharingan
Even Kakashi isn't from Uchiha clan, Whether this form is due to Kakashi or some inheritance from what Uchiha Obito was capable of is unknown. Using the eye, Kakashi can use a technique which appears to collapse space in around a focus point and transport it to another location.
Madara Uchiha's Mangekyou Sharingan
After developing the Sharingan, Madara and his younger brother trained against one another and eventually awakened their own version of the Mangekyou. The use of these eyes increased the brothers' strength and allowed them to take over leadership of the clan. Unfortunately the usage of the eyes lead Madara to lose his vision.
Madara's Brother's Mangekyou Sharingan
After developing the Sharingan, both brothers trained against one another and eventually awakened their own version of the Mangekyou. The use of these eyes increased the brothers' strength and allowed them to take over leadership of the clan. But because of Madara as the lead get blindness, he give his eye into Madara.
Madara Uchiha's Eternal Mangekyou Sharingan
Those who possess a Mangekyo Sharingan suffer from ever-deteriorating eyesight, a process that becomes faster through repeated usage and culminates in blindness. nly by taking the eyes of a sibling can one's eyesight be permanently restored, combining the appearances of the two Mangekyo Sharingan and granting them immense strength in the process. As a result, Madara awakened a new more powerful set of eyes which allowed him to see the light once again.