[Etiology of central retinal vein occlusion].

Arteriosclerosis is responsible for the majority of primitive pictures of central retinal vein occlusion occurrence. The venous occlusions appearing during the development of the already known disorders represent secondary venous occlusions. In young adults central retinal vein occlusion probably represents a general nonspecific change emerging from a number of individual causes or maybe a combination of causes e.g. multifactorial etiology. During unusual cases of central retinal vein occlusion the etiology is known but within the vast majority of patients the specific cause or even the causes that contribute the occurrence of this disease remain unknown since the ophthalmic literature is limited by a scarcity of histopathologic material.