Amaterasu

[Draphsin]

When you close your eyes, the Justu stops.

When using Amatersu it's a struggle to keep your eyes open.

Amatersu users would be relieved to shut their bloody eyes.

Look at the itachi vs Sasuke fight, itachi closed his eyes.

This, when the eye closes the jutsu stops.

Itachi built up chakra for ama starting

You must be registered for see links

, then he was able to use it in short bursts without having to build that chakra up again. [

You must be registered for see links

-

You must be registered for see links

-

You must be registered for see links

]

This shows us that when the eye is closed the jutsu stops.