[Ocular vascular spasms (I)].

Apart from arterial circulatory disturbances produced by organic alterations of the arterial wall, thrombi that obstruct the lumen, compression that narrows the vascular lumen, poor blood perfusion in the vessels there also exist other, frequently not recognized etiologies, i.e. the vascular functional spasm. This ignored or neglected cause should be carefully studied and an emergency treatment applied.