[SPOILER] Secret behind Zoro's Left Eye

Hey everyone! All of us know after timeskip many changed. However, the most notable of them is Zoro’s left eye scar. From this many question raises like,

1. Is Zoro’s eye is injured?
2. Is he keeping his eye closed purposely?
3. What power stays behind that eye?

So let’s decipher each question I have came up. If you have any other question write in comment.

1. Is Zoro’s eye is injured?

   He could’ve been injured during his training with Hawk Eyes. But, personally if it a scar from Yoru, it would’ve been much bigger. But what if he used other sword, then also it would be same, because ones Mihawk stopped Zoro from one small knife and even injured him severely.

     So now assume that Zoro is became blind from left eye. We will give you some examples of some characters with same type of injuries but they’re not blind.

I. Shanks:- we all know shanks eye was seriously inured by Blackbeard, but then too, he can see from that eye without any problem.

II. Sliver Rayleigh:- Everyone has noticed that the injury on his right eye is identical to Zoro’s left eye.

2. Is he keeping his eye closed purposely?

     Probably yes, because he haven’t shown any significant changes compared to Sanji. He haven’t even used his three sword attack in anime episode. There will be two reason for keeping his eye closed

I. Admiral Fujitaro's has lost his both eyes but there is more use of Kenbunshoku Haki as it let us sense all surrounding.

II. As Zoro hasn’t shown any other significant changes than strength than we can say that there would be anything residing behind his left eye.

3. What power stays behind his eye?
 

     In Naruto, Kakashi also got a injury in his left eye and he reveals it after many episodes and the sharingan brings significant changes in his power, he also copies the Zabuza's 23 hand seals of water dragon jutsu.

     Similarly some thing same would be on the left eye of Zoro which would bring some more power or even show new things to all of us! We all need to wait till that time arises.

I have invested a lot of time in this theory, so I will be grateful if you were able understand this concept. Please do share this.