Optic neuritis is the cutest , the sweetest , the fantastic of the answers I have ever read so far ! ( not the condition though) It usually appears as long answer question , I so wish to have read this earlier with so much interest ! It hits your imagination in the most filmy way! After a marathon of exclamations let me tell you what it is. It's nothing but a demylination & inflammatory disorder of optic nerve. Done? Cause? Most of the causes are termed as 1.idiopathic (in most of the diseases in the text book , easiest to write down) next is the second most common answer 2.heriditary , as I told you Its a demylination disorder lets name a disorder umm... 3. Multiple sclerosis! Next? Yes , some 4. Inflammatory conditions please , (fatal ones ) AIDS , syphilis , cat fever then? -Itis... got a clue? No? Any 5.infection you consider will cause inflammation . Name some. Chicken pox , whooping cough , glandular fever, measles and mummmps! Tadaa Now the classification which I know