Re: iridology
The rings are nerve rings and are created by your repressed emotions and drives. They slowly become tighter and reduce your Qi/Chi energy and the nerve impulses to every part of your body ie ageing. They affect the outside of the body first ie the skin and the circulatory system. They can be traced from the different organs and can show what energy blocks you have. For example you have a nerve ring running from the lung (sadness) to the kidney (fear) on the left image, is that the left eye? If so then you have a fear of feeling sad. I cannot make out a similar ring in the right image as the light source and visibility of the rings is not very good. If there was one then that would be a fear of expressing sadness ie crying. The inner feeling (left eye) and the outer expression (right eye) are totally separate and one can be blocked, both can be blocked or more rarely none can be blocked (ideal). It's a similar situation with the liver (anger). However it is important that the orientation of the images are interpreted correctly, knowing which eye is which and any mirroring due to the camera etc. Otherwise it could not be interpreted correctly.
These beliefs are picked up from parent's and it's how parents can really screw up their kids. Blocking emotions is a crime IMO and the majority of parent's put blocks on their children's emotions which can have serious health consequences.
BTW you do not seem to have any nerve rings in your bowel which is a positive thing as for such individuals blocking sadness feelings or expression can cause constipation. This is far more common in astrological water signs than any other at least from what I have noticed. It does not seem to be genetic, strangely the star sign does seem to play a part but I cannot explain why.
I would say that you are most likely not a water sign. Cancer, Pisces, Scorpio
BTW Chinese herbs can reduce the nerve rings, they are called Qi toning herbs and have anti ageing effects. A baby should have no nerve rings whereas an elderly person will have quite deep and tight nerve rings as nerve rings have depth.