Are eye techniques in Naruto based on anything real? Are the eye techniques in Naruto (Byakugan, Sharingan, Rinnegan) based on true events? Or are they just myth or a fiction created by Masashi-Sensei? Anyone has any references or a story behind it?
According to the Naruto wiki page on dōjutsu, there are two potential points of inspiration for the dōjutsu techniques (rinnegan/sharigan/byuakugan).

The first: 


  The concept of dōjutsu may have been inspired by Futaro Yamada's 1959
  novel, The Kōga Ninja Scrolls (甲賀忍法帖, Kōga Ninpōchō), which featured
  two warring clans of ninja that had developed mutations and abilities
  through selective breeding, with the young heirs to each clan
  possessing mysterious dōjutsu.


Or alternately, 


  Another possible inspiration for dōjutsu in the series may also be
  found in the Journey to the West classic's titular character, the
  Monkey God-King, Sun Wukong: After having eaten all of the 'peaches of
  immortality', the 'pills of longevity' and drunk all of the 'wine of
  immortality', and then was captured after a long rebellion against
  Heaven, the Monkey God-King, Sun Wukong, was then sealed into Lao
  Tzu's Eight Trigram furnace to be burned to ash in order for Lao Tzu
  to reclaim his pills of longevity. But after 49 days, Sun Wukong broke
  out--stronger than ever--his body having been refined by the flames
  instead of being reduced to ash, His eyes had also become a fiery red
  and golden colour, becoming known as his "Fiery-eyes golden-gaze"
  (火眼金睛, Huǒyǎn-Jīnjīng); an eye condition that allowed Sun Wukong to
  now see what's really there just by looking and the ability to see and
  recognise the real form of evil despite whatever form that it took on
  — but, likewise, it also gave him a weakness to smoke, fogging his
  vision.