I used to have hazel eyes and for the past 4-5 years, they had progressively gotten darker. I am 4 days into experimenting with methylene blue. I happened to look in the mirror a little while ago and was shocked to see that my eyes were noticeably lighter. Has anyone else had this experience? I vaguely remember reading and hearing something about cytochrome oxidase having a role in eye color change, but I can't find anything now when I do a search.