<unk>  (also known as ophthalmic<unk> , visual<unk>  and ocular<unk>  is a<unk>  disease often accompanied by<unk>  headache and typically affects only one eye. It is caused by an infarct or vascular spasm in or behind the affected eye.
The terms<unk> " and "ocular<unk> " are often confused with an abnormal condition in the brain (cortical spreading depression) that may cause similar symptoms such as scintillating scotoma affecting vision in both eyes, also associated with<unk>  headaches.
Retinal migraine
Open-angle glaucoma
Glaucoma
Cavernous sinus thrombosis
Ocular hypertension
Cat eye syndrome
Bacterial endophthalmitis
Anterior ischemic optic neuropathy