Chalky white optic disc on fundus examination is seen in all except-
Chalky white disc is seen in primary optic atrophy. Trauma to optic nerve, Tabes dorsalis (syphilis), and Leber's hereditary neuritis can cause primary optic atrophy.
In post papilledematous (Secondary) optic atrophy the disc is pale or dirty/ grey disc.
Syphilis
Lebers hereditary optic neuropathy
Post papilledema optic neuritis
Traumatic injury to the optic nerve