Originally posted by CiKi90
I've been reading more into it, and apparently there are only two kinds of pigment found in irises: black and brown! Shades of brown, blue, grey, green, and hazel colours are an interplay between the amount of pigment (melanin) in the eye, and the cellular density at the front of the iris, which light is reflected off (in a similar way to how light is reflected during sunsets), and then gives us the colour.
Eyes can darken if melanin increases / the granules make darker pigment, and can lighten if melanin decreases / the granules make lighter pigment.
Your diet affects the levels of melanin, which can thus affect the colour.
The most major change to my diet in the last few months has been the elimination of binging, the reduction in veggies, and the uptake of bananas (which I no longer fear )