[Formation of congenital anomalies of the optic disc. Part II. Congenital anomalies of the optic disc with inappropriate disc size].

Embryological conditions, each of fifth congenital anomalies of the optic disc from the group of anomalies of inappropriate optic diameter was described. Few available epidemiological data were given. The influence of medications, drugs, intoxications, as well as premature birth on genesis of congenital anomalies was taken into consideration. Malformation of central nervous system was introduced together with clinical syndromes related to congenital anomalies of the optic disc indicating the genetic condition.