This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Investigation in ophthalmology and miscellaneous topics, Subject name: Ophthalmology
True regarding amaurosis fugax are all except: 
Select and explain. 
A. Transient, recurrent episodes of visual loss, B. Binocular lesion, C. Embolus from carotid aery is commonest cause, D. Ocular examination may be normal
B: Binocular lesion
Answer: B: Binocular lesion 
Explanation: Amaurosis fugax Sudden, temporary and painless monocular visual loss occurring due to a transient failure of retinal circulation. Uniocular lesion Lasts for 2-5 minutes and resolves in the reverse pattern of progression, leaving no residual deficit. Fundus : May be normal or shows retinal ischemia-Retinal oedema and small superficialhaemorrhages Causes : Carotid transient ischaemic attacks (TIA) Embolization of retinal circulation Papilloedema Giant cell aeritis Raynaud's disease Migraine Hypeensive retinopathy Venous stasis retinopathy