Hi so I'm just wondering if there are other people who are seeing their eyes turn to this but I have these rings that I don't know what it means.

Does it mean I'm getting healtheir, is it normal, or should I be seeing a doctor?? And if it has happened to anyone-- what does it MEAN? Thank you so much. This community is amazing. :)

My eyes look just like this:
http://www.drgaelriverz.com/images/anxiety_tetanic-brown.jpg [2]

And my eyes used to be kind of a darker brown and now I don't know what the rings are. They also have the lightish-yellow-green to them. I heard something that yellow rings are toxic too.. soooooo any info would be really appreciated thanks!