Board Thread:Naruto Discussions/@comment-24347194-20150412182932/@comment-3965545-20150412202712

http://www.reddit.com/r/Naruto/comments/2mi8cr/translation_completed_uchiha_sasuke_4th_databook/

" イタチの命と引き換えに、サスケは直巴の〝万華鏡写輪眼” を開眼. " = "In exchange for Itachi’s life, “Chokutomo”/Straight tomoe of the Mangekyou Sharingan were awakened."

and

" 移植されたイタチの目は "万華鏡写輪眼" に永遠の光を灯し、 兄をも凌ぐ忍術と瞳術をサスケに与えたのだっ た. " = "Implanting Itachi’s eyes, the Mangekyo Sharingan, it gave him an eternal light that was turned on. It also surpassed his older brother’s ninjutsu and doujutsu."

and

" 兄の”写輪眼”は永遠の光をサスケに与えた. " = " With his older brother’s Sharingan, Sasuke received eternal light. "

Sorry WindStar but it seems the EMS boosts the Ninjutsu and Dojutsu(either the techs or the eye itself? idk) somewhat along with giving eternal light.

Also it is INDEED Sasuke's Mangekyo, NOT his Eternal Mangekyo.. that is “Chokutomo”/Straight tomoe.