Tien Shinhan, also known as Tien, is a fictional character in the Dragon Ball manga series created by Akira Toriyama. One of the series’ main characters, Tien is a skilled martial artist and member of the Crane School, a group of martial artists who specialize in a style called the “Multi-Form” technique. Tien is known for his distinctive physical characteristic of having three eyes.

The origin of Tien’s third eye is not explicitly explained in the manga or anime series. However, it is suggested that Tien’s third eye is a result of his training at the Crane School. In the Crane School, students undergo intense physical and mental training in order to master the Multi-Form technique, which involves creating multiple copies of oneself in battle. It is possible that Tien’s third eye is a byproduct of this training, as it is mentioned in the series that the technique requires a high level of focus and concentration.

In addition to its potential connection to Tien’s martial arts training, it is also possible that Tien’s third eye is a genetic trait inherited from his ancestors. In the Dragon Ball universe, there are several characters with unusual physical characteristics, such as the Namekians, who have green skin and the ability to regenerate limbs, and the Frieza race, who have the ability to transform into various forms. It is possible that Tien’s third eye is a genetic trait passed down through his family line.

Despite its unusual appearance, Tien’s third eye is not simply a cosmetic feature. In the series, Tien is shown to have heightened senses and perception due to his third eye, which allows him to react faster and more accurately in combat. Tien’s third eye is also shown to have the ability to see energy levels, which gives him an advantage in battle against opponents with high levels of ki (energy).

In conclusion, Tien’s third eye is likely a result of his training at the Crane School or a genetic trait inherited from his ancestors. While its appearance may be unusual, Tien’s third eye serves an important function in his martial arts abilities, giving him heightened senses and the ability to see energy levels.