Patient presents with optic nerve pallor, a clinical finding characterized by a pale appearance of the optic disc.  Assessment reveals decreased visual acuity, potentially involving color vision deficits and afferent pupillary defect.  Etiologies under consideration include optic neuritis, optic atrophy, glaucoma, compressive lesions, toxic optic neuropathy, ischemic optic neuropathy, and hereditary optic neuropathies such as Leber's hereditary optic neuropathy.  Differential diagnosis includes other causes of vision loss, such as macular degeneration, cataracts, and retinal detachment.  Funduscopic examination and visual field testing were performed to evaluate optic nerve head pallor and assess visual field defects.  Further investigations may include neuroimaging (MRI brain with and without contrast) to rule out intracranial pathology, blood tests to evaluate for inflammatory markers or vitamin deficiencies, and genetic testing if indicated.  Management will be directed towards the underlying cause of the optic nerve pallor and may involve corticosteroids for optic neuritis, treatment of underlying glaucoma, or surgical intervention for compressive lesions.  Patient education regarding prognosis and potential visual rehabilitation strategies is crucial.  Follow-up ophthalmologic examination is scheduled to monitor disease progression and treatment response.  ICD-10 codes for optic atrophy (H47.2) and other related diagnoses will be used for medical billing and coding purposes, with appropriate CPT codes assigned for procedures performed, such as ophthalmoscopy and visual field testing.  This documentation aligns with clinical guidelines for the diagnosis and management of optic nerve pallor.