It seems from the history that you are having allergic conjunctivitis
. Now what you are saying as iris colour is called muddy colour of conjunctiva
seen in long standing allergic conjunctivitis.Vernal conjunctivitis
is one of the most common form of allergic conjunctivitis seen in young individuals. It usually starts in the childhood and decreases in severity with increasing age. It can involve the cornea resulting in vernal keratitis
The treatment of allergic conjunctivitis is mainly from antiallergic drugs like antihistamine drugs, mast cell stabilizers and steroids.
Immunosupressant drugs like cyclosporine
are used in refractory cases. Kindly contact your eye doctor, he will decide the best treatment for you depending on the severity.