#uchiha have scary ginormous spirit gaurdians living in the in their eyes anything is possible

[03-ooz]

its time to take the uchiha clan cat conspiracy one step further

the cellular makeup of the sharingan is different than that of a normal human eye and shares some similarities with cat eyes. feild of vision and distance perception are human standard, but color/light perception improves. so, heres how i see this working

because of their kekkei genkai uchiha are genetically predisposed to have more photoreceptors in the eye compared to other narutoverse humans (particularly rods, we'll circle back to that)

the reaction of the chakra on the optical nerve stimulates the typically dormant rods and cones within the eye and changes the way the sharingan percives light

so the extra photoreceptors in the eye are activated by chakra meaning they are only active when the sharingan is active and plain eyesight is unaffected

sharingan users have an enhanced sensitivity to light which is partially why awakening the eye can be a painful process

this enhanced sensitivity nerfs the sharingan a little bit the eye is still incredibly op during night/lowlight combat but it can be incredibly difficult to navigate use during the day because of the strain the enhanced perception cause on the eye although with proper training you can overcome some of the discomfort

the extra rods in the eye enhance night vision for sharingan users

the extra cones are there cause i think its funny that your faves favorite color is beyond your compression

the red hue in the sharingan is like a chakra activated tapetum lucidum which contributes to the motion sensing feature of the sharingan as well as enhanced night vision (most importantly consider reflecive sharingan make brain go brrrrr)

nekobaa loves the uchiha cause they're big spenders but also cause of the cool cat eyes

kakashi keeps the eye covered to conserve energy but also cause constant exposure to light = constant migraine and the darkness helps mitigate the symptoms

all of this to say

uchiha can see human bioluminescence pass it on

this has been sciencey headcanons with a highschool dropout. tune into the next post to read about how zetsus photosynthesize and obito too maybe!?!!? (i did really enjoy my freshman biology class but that was 8 stoned years ago so bear with me here i sure hope the science side of tumblr never ever sees this)