Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-4961229-20200412073906

FlatZone wrote: Look behind Itachi to his right and you can see the ground and a small but of rubble. He is clearly looking up at the sky, the angle shows that. Also that would still be a legitimate feat for Kakashi too, though not as impressive considering he was not nearly blind, was not nearly dead, and had chidori to use against the lightning in ways pointed out already

The Sharingan captures everything that happens within your field of vision. You don't need to be directly looking at the target. Almost nothing can escape its attention, except motion that outstrips even Sharingan prediction, like 4th Raikage Raiton armor, Kirabi swordplay, or Itachi hand speed. Anything else, if it's in front of his face, it's being recorded in the Sharingan, whether he's looking dead at it or not, plain and simple.