1 Tomoe: It allows the user to perceive motions and see chakra. They also gain the ability to see through visual D rank genjutsu (visual illusions) and can follow the movement of most taijutsu moves done by normal Shinobi, even those faster than the user and the movement of most Ninjutsu, allowing one to be able to react best to the situation
2 Tomoe: It allows the user to perceive motions as well as be able to copy the motions perceived as long as he is able to perform them physically, The user can now anticipate and analyze faster movement, as well as mimic minor movements made by an opponent. The user can now track higher speeds (almost twice as fast) and, by reading the handseals, can predict to some extent the use of Ninjutsu techniques (but will always obey and abide by the time frame rule as he can never start performing a counter/move before the opponent has started his, meaning that there will always be a logical sequence of moves that will obey the time frame). The user is now able to pierce through visual C rank genjutsu and below.
3 Tomoe: It allows the user to perceive motions, copy the motions perceived, and predict motions, now has the ability to keep up with extremely high speeds and mimic basic taijutsu exactly. With this the user can now copy handseals done by an opponent (using the adequate Copy Technique), and use jutsus as they do as long as he's able to perform them (having the adequate chakra nature, adequate knowledge of the field of expertise being copied, etc). The user must however be able to mimic the techniques, for if they are not physically able to preform the copied techniques they cannot do them. The user can now pierce through visual B rank genjutsu and below. Unlike the previous two sharingan stages this level has the ability to hypnotize a target.
Ill skip the Ms and EMS as they are impossible for me to reach as of now, unless you want me to add the MS and EMS then i will do so