Central retinal artery occlusion>>> pale retina and Chery red spot .
Branch retinal artery occlusion>>> partial ( like quadrant) pale retina …eg like Lyme and sarcoidosis .
Optic neuritis >>> pale optic disc …decreases visual acuity ,but colour usually preserved .
Optic neuropathy ( arteritic or non arteritic ) >>> decreased acuity , colour , and visual field problem .
Arteritic due to temporal arteritis .but non arteritic like in DM and HTN .
Flashes and floaters = vitreous detachment.
Curtain or veil over field of vision or straight lines became curved = retinal detachment.
Dark spots or floater = vitreous hemorrhage.
AF >> central retinal artery occlusion .
Glucoma >>> CRVO .
Hemorrhagic fundus and obscured vessels = CRVO .