The Byakugan (literally "White Eye")is a special pupil condition that naturally occurs in members of the Hyuga clan (and thus only characters from the Hyuga house - such as Hinata, Neji, Hiashi, Hizashi (deceased), and Hanabi - possess it). Although it seems that the abilities of the Byakugan are inferior to those of the Sharingan (the Byukugan is beleived to have evolved into the Sharringan) because it cannot copy techniques that it sees, or hypnotize human targets, in terms of insight the former surpasses the latter, as stated by Hatake Kakashi during the Chûnin exams. A person with the Byakugan can have a 360 degree field of vision, except for a small blind spot behind the first thoracic vertebra (near the back of the neck), which is its only known weakness. Byakugan users can detect anything around them in a 50 meter radius although later on in the manga Hyuga Neji has managed to increase the radius to 800 meters (with the exception of the blindspot) making them close-range combat experts. When the Byakugan is activated, the user can see through most matter over extremely long distances, although this may depend on the individual user, and perceive the Chakra inner coil system, enabling usage of the Juken (Gentle Fist) to attack said system. Its sight cannot be blocked (unlike the Sharingan, which can even be blocked with a piece of cloth), making it useful for searching, tracking and identifying targets. It has however been impeded slightly by certain powerful seals