Board Thread:Theories and Speculation/@comment-31099706-20170327120301/@comment-25122992-20170409193855

Firstly, again, no evidence Sasuke used CS in reality instead of within illusion. And no, most of Sharingan genjutsu (or even regular genjutsu) requires eye contact, the only one without it is Kotomatsukami, but that's a unique case. And, gain, every jutsu has a weakness, Tsukuyomi isn't an exception either.