I do not own Avatar the Last Airbender. I think, because Zuko was burned around his eye and even though he had his eyes closed that it would damage his eye. The burn has to be at least a second degree burn in the center to leave a scar like that. They are on Ember Island.

I was training Aang to fight my father. We were sparing, he was learning quickly but not quick enough. Sozen's comet was only a week away. I was distracted in my thoughts, which was when Aang sent a fireball towards the left side of me; the side where I have a hard time seeing.

I hissed when it made contact with my shoulder. I inspected it, it was red but it was dry. The burn was not as serious as the one around my eye. I bet it would fully heal in at least three days with little to no scar.

I saw Aang run up with a worried look on his face. He started frantically and childishly shouting apologies, Katara walked to us with a worried look on her face.

"I accidentally burned Zuko!" Aang cried.

It was my turn to step in. "That was pathetic! You call that firebending!"

Aang replied meekly, "Yes."

Katara noticed how things were going down hill, "Let me heal you Zuko."

I followed her; she had been nice to me ever since we came back from our Southern Raiders field trip. We went onto a room and I sat she began to heal me, which only took a couple of minuets.

"I wonder…," She said.

"What?"

She then called Toph, Aang, and Sokka over for an eye exam. I was included in the eye exam. I was getting nervous; it was only a matter of time before they discovered how weak I am.

Sokka asked "Why did you call Toph over? It's not like-," he was then cut off by Toph.

She earthbended a hole that he fell into. Katara sniggered at her brother's misfortune.

"She will be my assistant. Toph, please make an eye exam board."

Toph then began her work. In a matter of seconds there was an eye exam board with all the nation's symbols in different sizes. First was Aang. Katara had him take the exam with his eyes uncovered, then his left eye covered, then his right eye. Aang had perfect vision, after Aang was Sokka who also had perfect vision.

Katara then called me up, she then whispered in my ear as I walked up "I think I know a part of the reason you were burned, they deserve to know to."

I felt anger at her, how dare she try to tell others my secret! How dare she show them how weak I am! Calm down, I thought. I need to be good and to be good I can't hold secrets from them.

The exam went. I was perfect with both my eyes uncovered, I just tutned my head slightly to the right. I was perfect with my left eye covered, then came the time to cover my right eye. She pointed to symbols.

"Water?"

"No, fire."

"Air?"

"No, water"

"Earth?"

"No, air."

This went on. I was getting annoyed and apparently so was Sokka.

"You have to be faking this!" He cried.

"I don't think Zuko is, do you have anything to say Zuko?" Katara asked while giving me a look that said tell the truth.

I sighed and told them the story.

"I lost an Agni Kai with my Father. He burned the left side of my face, most of the burn being concentrated around my eye. The heat burned part of my eye, making it difficult to see."

"Then why have we not noticed, huh, huh?" Sokka asked.

"I trained with Uncle, his training made me develop my other senses quicker."

Sokka, Aang, and Toph just stared at me with there mouth gaping while Katara was shaking her head like she knew it all along, she probably did. That slightly bothered me.

The part of Zuko's eye that was burned is the cornea. The cornea is like the lence that makes it clear to see.