Responses
I'm exited to find out lol
1. Isaiah give an eye (the color similar to Adam)
2. Gabriel and Isaiah
3. Heterochromia
4. Just a blind eye(lost it in a battle or something)
5. Michael aka Eve restored his Adam's eye before he erased his memory(he has ability to rejuvenate his organs, so why not the eyes)
6. Author's idea
Isaiah and Gabriel gave each one eye to give adam his vision back hence their eyes are different