Why didn't Itachi use Shisui Uchiha eyes to gain EMS? - Quora

Why didn't Itachi Uchiha implanted the one Sharingan Shisui Uchiha gave him into himself to unlock EMS in at least one of his eyes? This would have prevented his sickness albeit temporarily

Why didn't Sasuke's MS pattern change to Itachi's once he had his eyes transplanted? - Quora

What would happen if Itachi had a Sharingan in his right eye? - Quora

What happened with Shisui's eyes? - Quora

Why didn't Itachi use Shisui Uchiha eyes to gain EMS? - Quora

What is the Kotoamatsukami technique? How did Shisui use it on Itachi? - Quora

Why didn't Itachi Uchiha implanted the one Sharingan Shisui Uchiha gave him into himself to unlock EMS in at least one of his eyes? This would have prevented his sickness albeit temporarily

Why didn't Sasuke use his Eternal Mangekyo Sharingan (EMS) during his fight with Danzo, when it was clear that he could have beaten him easily? - Quora

Why didn't every Uchiha trade one eyeball for an EMS Sharingan and then unlock the Rinnegan? - Quora

What are EMS and Mangekyo Sharingan? - Quora