A subarachnoid haemorrhage primarily presenting as Terson's syndrome.

We present a case of a subarachnoid haemorrhage due to a ruptured basilar artery aneurysm in a 61-year-old woman. She presented with visual deterioration as the only clinical sign, no previous episodes of headache were reported. Fundoscopy showed a bilateral vitreous haemorrhage. A consecutively performed cranial computer tomography demonstrated subarachnoid bleeding. Further diagnostics revealed a basilar artery aneurysm that was successfully treated with coil embolisation. As a scarring of the vitreous bodies developed, they had to be removed. The patient's eyesight improved gradually and no further complications occurred.