Histopatholocial changes in siderosis bulbi.

The histopathology of indirect siderosis bulbi induced by iron intraocular foreign bodies which penetrated into the posterior segment of the eye, is reported. Iron ions dispers into the vitreous first and in the aqueous humor later and then they enter into all the tissues which surround the vitreous and the aqueous. Iron ions penetrate also into the suprachoroidal space through the angle. The importance of this route of penetration upon the appearance of atypical ERG finding in siderosis bulbi is briefly mentioned.