Blue ring around my iris?

There is a blue/purple ring, approximately 1 mm thick and goes around my my iris.


I am a little worried about it


any ideas what it may be


granted my eyes change from green to blue and brown but this is just weird.





thanks in advance

Blue ring around my iris?
Corneal Arcus





* Clinical features:


o Very common bilateral gray, white, or yellowish circumferential deposits in


the peripheral cornea


o Lucid area usually present between the deposits and the limbus


* May be found either as an age-related condition (arcus senilis) or in association with


hyperlipoproteinemia types 2 and 3 in younger people.


* Younger-aged male patients ( %26lt;40 year old) with corneal arcus have increased


relative risk of death from coronary artery or cardiovascular disease.


* The presence of corneal arcus in patients younger than 40 year-old warrants


evaluation for systemic lipid abnormalities.





http://dro.hs.columbia.edu/corarcus.htm





Wilson's disease has a distinct ring which is copper color but both white and copper color can appear to have a bluish tinge.





Now, after those here is a nifty sight with cornea and iris signs of diseases.





http://dro.hs.columbia.edu/corarcus.htm





You may look through the different categories of signs of the iris photos to see if any match yours.





As you educate yourself of the various possibilities, you will come to the conclusion that it would be in your best interest to rule out what might be the cause and consult with a physician who will run the appropriate tests.
Reply:Check out the website (www.irisandyou.com/anatomy-of-the-iris.... to see the figure and Part E explains the purple ring.











Structure of the Iris





A. Surface endothelium. This is a single layer of flat endothelial cells continuous with the posterior lining of the cornea.





B. Stroma, a closely packed mesh-work of delicate radiating connective tissue fibres, enmeshing numerous nerve filaments, blood vessels, lymph vessels and large, irregularly branched connective tissue cells.











Fig. 2. Cross Section of Iris





C. In the deeper layers of the stroma a band of involuntary muscle fibres, about 1 mm. in width, encircles the pupilary margin of the iris. Reflex contraction of this sphincter diminishes the size of the pupil.





Some authorities describe also radiating muscle fibres stretching from the border of the sphincter to the circumference of the iris. In all probability, however, these are elastic and not muscle fibres, the dilation of the pupil being accounted for by the relaxation of the sphincter muscle and the resulting automatic contraction of the elastic muscle fibres. The brighter the light, the more contracted the pupil, and vice versa. This mechanism aims to regulate the amount of light to be admitted to the retina.





D. Basement membrane consisting of strong connective tissue, which forms the support and innermost layer of the iris.





E. The pigment layer consists of two rows of epithelial cells of a dark purple color, which rest on the uneven surface of the basement membrane of the iris. This pigment layer serves to prevent the penetration of light through the iris into the inner dark chamber of the eyeball.