The, condition' may be regarded as a moinimal form of maldevelopment of the optic cup; grosser forms are known, which result in the formation of the various degrees of congenital cyst of the eye. The other form of congenital ectropion uveae is that in which the two ectodermal pigment layers -remain in contact but come to lie further round on the anterior surface of the iris than usual. This is ...