Why are his eye in this shape ?

[bashkim]

You must be registered for see images

 

[Exaar]

We've only need the elder sons 3 tomoe so far.

His Eyes beyond that (Ms or what ever) could be the reason for the swirl

 

[yinyang180]

his eyes get so, when he gets himself some juubi chakra,

 

[Limbo]

That's prolly his Ms or EMS or whatever he had

 

[rollin]

He probably had the first ems he just didn't need power ups like a uchiha to awaken it

 

[Dantee]

Sasukes new pair of eyes.

 

[WhistleBlower]

Hold on, i'm calling Kishimoto right now :|

 

[bashkim]

His eyes are similar to the Rinnegan, but he did not have it.

 

[TrollKing]

Either ms/ems or rinnegan in ancient drawing form. Indra got sage good eyes as well as good genes

 

[St Joseph]

Probably his EMS

 

[Xāvî1]

it has to be his MS