Quote:
Originally Posted by Gakure
Moreover, he always palms his left eye after use. Which just proves more that it is Tsukuyomi. Regular gen is not known to cause strain to the eyes.
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Actually, Sasuke's right eye contains Tsukuyomi. His left eye uses Amaterasu. Amaterasu is said to damage the eye that uses it, which is why the user will cry blood from that specific eye.