blue ring aroound iris?

a while ago i noticed the whites of my eyes getting a bluish tinge. (everyone i told thought i was crazy but i could definitely notice it!) i did a couple lemon juice + olive oil drinks, i do oil pulling every day and i fast sometimes and so the blue tinge went away - the whites of my eyes are now clear and bright. my irises also got a lot clearer and brighter with the colour (brown around iris and green outer) getting a lot more intense (before they were dull and muddy looking). i can see more clearly as well!

my question is to do with a blue ring that ive always had around the outer edge of my irises all the way around. is this normal or should the whole iris be brightly coloured?

also do you know what the bluish tinge in the whites could have been and whether it can be related? (my thought is that it was some kind of heavy metal accumulation since i wore heavy make up every day for many years and used lots of commercial beauty products - but ive given those up now thank goodness!) or is it to do with iron deficiency maybe as i was anaemic when i was young?

edit: the blue ring is dark blue/gray Tweet