Optic disk drusen (ODD) is a much more prevalent condition than it is usually considered. It is important to recognize ODD in order to escape serious neurosurgical interventions and rule out the development of optic neuropathy leading to grave visual dysfunction. Three cases with ODD are described. The authors conclude that it is an acquired disease, which can be bi- and unilateral. Initial diagnosis "suspected congestive optic disk of both eyes" was erroneous in all cases and it was replaced by "pseudocongestion" because of ODD. A characteristic symptom of ODD is narrowing of visual field borders and presence of scotomas in the lower half of central visual field. Since ODD are a manifestation of progressive optic neuropathy leading to disorders in the central visual field, dedystrophic and (if necessary) ophthalmo-hypotensive therapy is to be carried out.