It had been considerably easier to hide his lack of eyesight from the rest of his classmates than it had been with the Hyuugas. They had seen it right away, whereas everyone else remained blissfully ignorant. And while the boy in the middle of the chakra flower formation had taken to staring at him in class instead of focusing on Iruka-sensei's lesson, he tried not to worry about it. The boy couldn't know, could he? He had the look of the Uchiha, but even the Sharingan couldn't look at chakra like the Byakugan. He was safe.
And the ANBU guards reassured him. Though he was perfectly capable of caring for himself, he appreciated the thought. And maybe he'd need some help if anyone ever threatened him again. People did that a lot, it seemed. He couldn't even think of a reason why. Kurama was sealed wasn't he? And anyways, he was nice. He'd only attacked Konoha because of a Uchiha, but nobody bullied the Uchiha in Naruto's class, Sasuke. He was gloomy and unsociable, and he made Naruto nervous when the class played outside. He'd come over by where Naruto, Hinata, and Neji were sitting and talking (they rarely played; Hinata was weak and Neji didn't want to risk her getting hurt) and simply watch Naruto the whole time, like he was studying some strange specimen in a lab. The ANBU had noticed as well.
They told him they'd be on the watch for any suspicious behavior and that they'd already informed Tsunade of these strange actions.
Naruto didn't start to really worry until a certain thing happened.