Fundoscopy of a patient shows chalky white optic disc with well defined margins. Retinal vessels and surrounding Retina appears normal. Which of the following is the most likely diagnosis-: (A) Primary Optic Atrophy, (B) Post-neuritic secondary optic atrophy, (C) Glaucomatous optic atrophy, (D) Consecutive optic atrophy
Answer is A. Chalky white optic disc with well defined margins along with normal retinal vessels and surrounding retina is typical of Primary Optic Atrophy.