Eye Thousand is one of the few remaining survivors of the Kan clan, who are a highly mutated race of people due to their harsh living history in the island of Kan. All of the members of the Kan clan have some sort of powers related to their vision. But they were hunted down due to their extraordinary visual prowess either for using them as military weapons or for the extremely high price of their eyes. Eye Thousand was put under extreme military experiments which was intended to replicate his prodigious eyes, but rather the repeated experiments made him highly durable and resistant to almost everything.
But most of his powers come from his Kan Suit and his weapon Kan Ser. Without them he is drastically weaker