Optic neuritis is a serious eye disease which won't go away by itself. It requires immediate treatment otherwise it might lead to vision diminishing or lost permanent. Vitamin B1 deficiency is the No. 1 cause of optic neuritis. One of the treaments is taking intramuscular injection of vitamin B1 and B12. Now, more and more young people are suffering from optic neuritis due to too much time spent in front of TVs and computers. If you feel severe pain in eyes, vomiting and headaches, you might get optic neuritis and you should go to see ophthalmologist at once to get treatment. Patients should have a light diet with rich nutrition. Fresh fruits, vegetables, milk, animal livers and egg yolk are preferred, but no too much dessert. Live a healthy and regular life with stable emotion and moderate exercises.