Blue Sclera is essentially caused when you have deficiency of iron. It is mainly caused when you have anaemia. Anaemia can be caused due to lack of iron and also because of other reasons as well. However, it is only in the first case that you have chances of suffering from this specific sclera type. However, the occurrence of this particular sclera is in no way affected by the age, sex or even by the color of the iris.If you have Blue Sclera you would at once understand that you have iron deficiency and in this case you must go for an immediate clinical check up.