In the manga, it showed he lost it by throwing the little blade of Mihawk, like he did for the cursed sword, but he wasn't ready for even the tiny little knife and he loses his eye.
Zoro wanted to see if he was worthy of Mihawks little knife necklace thing so he threw it it the air (like his cursed sword) and it slashed his eye which meant he still wasn't worthy to wield that knife.
In the manga and anime series "One Piece," Roronoa Zoro, one of the main characters, is shown to have lost his left eye.
The actual reason pirates wore eyepatches was because below decks was very dark and by covering one eye while above deck the eye that was covered would be adjusted to the dark, so when they went below all they had to do was flip up the patch and they would be able to see in the darkness.
In the two-year time skip, Zoro trained under Dracule Mihawk, popularly known as Hawk Eyes Mihawk. One of the popular theories is that the scar on Zoro's left eye is a training mishap. Many believe that Zoro lost his left eye during his training in some sort of accident or battle.
Zoro set out on his journey to becoming the greatest swordsman in the world by defeating Dracule Mihawk, the man who currently sits on the stone. Over the years, he has come a long way and become one of the strongest pirates on the seas. Zoro has attained terrific strength, but he does not rely on a Devil Fruit at all.
Zoro's left eye has glown multiple times throughout the series, most prominently during the Water 7 saga. In fact, Zoro not opening his eye could be him successfully controlling the power and surge of the demon Asura, which he couldn't before.
It is his trust in Luffy and Luffy's dedication to his dream. He believes Luffy has what it takes to be a Captain. Zoro believes in Luffy, he believes that Luffy would go to any length to keep his word. He sees this quality the first time they met each other.
During this arc, Zoro and Luffy, having lost their memories, confront each other and engage in a fight. It is during this fight that Zoro lands a strong surprise attack on Luffy, slicing his chest and thus giving him the X-shaped scar.
Dracule Mihawk is Zoro`s greatest rival and holds the title of the strongest swordsman in the world. Mihawk is extremely skilled with the blade and his sword fighting is described as very aesthetic. He is also extremely good at using Haki as he taught Zoro how to use it.
Episode 8 | One Piece Wiki | Fandom.
Roronoa Zoro learned how to imbue his swords with Armament Haki during the two-year timeskip when he trained under Mihawk.
So, for fans who wonder why Zoro stopped laughing, it isn't as simple as merely losing his sense of humor along with his sense of direction. Rather, it was due to Zoro realizing just what his crew needed him to be, as well as what he needed to become, in order to accomplish his own goals.
[One Piece] Luffy Gets Married with Hancock_2.
Luffy got his scar on his chest from Roronoa Zoro this happened while Zoro's being controlled on Episode 223 from 10:55 - 11:10.
That said, there is one crew member who stands above the rest in terms of loyalty to Luffy: Roronoa Zoro. The Straw Pirates' first mate has proven his loyalty on numerous occasions throughout the series, even putting his crew mates' well-being above his own life.
Zoro is perceived as the vice captain of the Straw Hats. He is arguably Luffy's most loyal crewmate. He has displayed the most respect and dedication to Luffy by following his orders, proclaiming promises, and being the most vocal about Luffy achieving his dream of becoming the Pirate King.
Out of all the Straw Hats, Usopp is easily the least loyal. Not only did he nearly abandon the heroes amidst their darkest hour at Dressrosa, but he also fought Luffy directly for the rights to the Going Merry. It is implied that Usopp thinks he has become more dependable over the years.
It limits his sight and his depth perception in particular, and it would get hair in his open eye whenever the wind blows.
After the Timeskip. After the two-year timeskip, Sanji now covers his right eye, shows his left eye, and has grown his hair just slightly longer.
Zoro was the first person who accepted Luffy's invitation and joined the latter on his journey to become the Pirate King. Zoro is a very powerful fighter and he possesses all three types of Haki. Zoro was able to use Conqueror's Haki unknowingly against Kaido.
Enma is the strongest sword possessed by Zoro of the Straw Hat Pirates right now.
Actually not just 1, he can eat 3 devil fruits. Yes.
And then later on he ate the two fruits and cuz of his sleeping disorder the two devils wouldn't fight each other.