Neuro-ophthalmology predominantly deals with diseases affecting the optic nerve. The optic nerve carries information from the retina in the eye to the brain where it is processed to produce the visual impression of an image. Neuro-ophthalmology deals with disorders of the brain and optic nerve. The optic nerve may get affected in a number of conditions both involving the nerve directly (inflammation or swelling or ischemia or atrophy) or indirectly (in neurological diseases such as Multiple sclerosis, Alzheimer’s disease, Parkinson’s disease, stroke, and brain tumors). In some cases, the optic nerve may appear normal but the visual pathway in the brain may be affected resulting in cortical visual impairment.