<prompt> 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-Primary Optic AtrophyPost-neuritic secondary optic atrophyGlaucomatous optic atrophyConsecutive optic atrophy  <response>: Chalky white optic disc with well defined margins along with normal retinal vessels and surrounding retina is typical of Primary Optic Atrophy. 