How Did Amaterasu Itachi Affect Sasuke'S Eyes In Canon?

Watching that scene in 'Naruto Shippuden' still gives me chills — Itachi's Amaterasu doesn't do anything mystical to Sasuke's eyes like swapping or permanently burning them out, but it definitely leaves a mark on the fight and on Sasuke physically. In canon, when Itachi fires Amaterasu during their final confrontation, the black flames lick at Sasuke's left eye area, scorching skin and lashes and making it look like the eye itself is on fire. The manga panels show smoke and the characteristic black flames around his eye, but crucially the Sharingan remains functional afterward. So what you're seeing is painful, visible burn damage to the eyelid/skin and a scary visual effect, not total ocular destruction.

From a mechanics perspective, Amaterasu is designed to burn relentlessly until its target is reduced to ash. Against a living person it can cause severe burns, and against chakra constructs like Susanoo it can do serious damage too — which is why its use against Sasuke during their clash mattered strategically. Sasuke at times manages to protect himself with his Susanoo and with sheer reflexes, so the flames don't simply erase his eyesight. Later on, Sasuke's real long-term eye problems come from prolonged Mangekyō Sharingan use, not that particular Amaterasu incident. In fact, Sasuke eventually receives Itachi's eyes to become an Eternal Mangekyō user, so any temporary damage from those flames was never the decisive factor in his ocular fate.

I like to think of that moment as a storytelling beat more than a surgical injury: Itachi's Amaterasu visually communicates the danger and obsession between the brothers. It scars the scene and Sasuke's face, gives him a raw look, and underlines how close Itachi came to destroying him — without actually making him blind on the spot. If you rewatch or reread the fight, look at how the panels frame the flames around Sasuke's eye versus his actual pupil; it's a neat reminder that in 'Naruto' injuries can be both symbolic and kinetic at the same time, and that the heavy duty ocular consequences came later from Mangekyō overuse and the transplant, not solely from that black flame.