A book about a green eyed, white haired boy
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So, I remember a book/book series(?) I read back in middle school about a boy with green eyes and white hair who could like, alter reality???
He woke up originally alone in a cave with no memories and eventually was found by a dude who we much much later find out is a human from another reality who believes he died and everything around him is just the hallucinations of a dying mind.
The MC could see fate?? Potential paths of reality as these shiny threads??? He almost gets killed a lot.
The only other thing I really clearly remember about the book is the mc's species (he wasn't human) can be created using their eyeballs and that they're hunted because they're very powerful and rare.
Tbh, I'm not 100% sure this WASN'T a fever dream, would love any guesses, kinda wanna read it as an adult, see if it's as good as I remember.