Optic nerve atrophy and macular degeneration usually begin with a period without symptoms where the optic nerve disorder is still in its reversible stage of damage. However, symptoms start developing when the fovea – the most critical part of the retina responsible for central vision – is involved. After this stage symptoms begin to develop. Symptoms include blurred or distorted vision, reduced visual acuity, reduced visual fields, impaired color vision, impaired night and/or light vision, and nystagmus – or abnormal involuntary eye movement (1-3).