Shiroyukugan

Background
The Shiroyukugan was found to only be in the Shimizu Clan. Originally found

Abilities
Due to the fact that the Kowaregan gives the user complete control over the light that enters his eyes, it also has many facets of this ability that are very unique. The very first of witch is the ability to see things in diferent color spectrums ranging from infra-red to ultra-violet. Basicaly it can make bright things dim and dim things bright. Secondly by manipulating the light as it comes around obstacles one can, in effect, see around corners. It also gives the user night/heat/Xray vision. And the final facet of the Kowaregan is the ability to turn any surface, provided it meats specific criteria, into a mirror.

Trivia
The kanji for Kowaregan means Broken Eye.

This is the first doujutsu that isnt a kekkei genkai.

The iris segments of this doujutsu stay the same color as the users natural iris color.