The Uchiha clan member is not granted the Sharingan at birth; it is only activated later in life, typically during a time of emotional stress in the heat of battle.
Two tomoe will also allow the ninja to pierce Genjutsu and see the surrounding reality for what it really is. It can also allow the member to pierce another’s body and see their chakra. While the eye is not refined enough to see the tenketsu and chakra circulatory system like the Byakugan, it can view the movement and flow of chakra. This can help them tell if a person is trapped in a Genjutsu, or if an attacker is a real threat or merely a genjutsu clone.
An eye containing three tomoe will allow the ninja to see the image of an attacker’s next move from the slightest muscle tension in their body. This prevents wasteful movement and allows the Uchiha clan member to conserve much needed chakra in battle. It allows them to synchronize their movement to strike at an area moments before their opponent is even in that spot, essentially allowing them to strike out and hit their opponent before they're even there.
To Obtain the Sharingan
To gain a One Tomoe you need to have a battle where it could be a life or death Situation. ( After that is met you need a 150 word training topic )
To obtain a two tomoe you need to do some serious training. ( 300 word training Topic. )
To obtain a Three Tomoe Sharingan you have to do intense training of the Mind and body not to mention some intense stress of both body and mind again. ( 500 word training post )
Now to Obtain a Mangekyou Sharingan. First you have to already have Three Tomoe Sharingan, after that you have to go through the deep emotional stress of losing a best friend in front of your eyes. After that you must train hard for it. Although after each use you lose abit of your eye sight eventually going blind. This allows for some of the most powerful clan jutsu at your disposal (1500 word training topic needed and approval from two admin )
But wait there is another level
Eternal Mangekyou Sharingan you may obtain after reaching all of the level stated above then taking the eyes of another Uchiha, by doing that you will not go blind anymore but one you may die from the process and also have to be a medic or have a medic nearby to complete the transfer without you dying. ( 2000 word taining post needed and approval from three admin)
If you got your tomoe in the past you MUST still do a training topic. You must label it something that goes with your history to get your tomoe.
NOTE IF YOU HAVE ANY MANGEKYOU SHARINGAN YOU CANNOT GET ANY LIMTED TECHNIQUES AND VICE VERSA!