Acute vision loss (noninflamed)

• Arteritic anterior ischemic optic neuropathy
• Amaurosis fugax
• Central retinal artery occlusion (CRAO)^†
• Central retinal vein occlusion (CRVO)^†
• High altitude retinopathy
• Open-angle glaucoma
• Optic neuritis
• Posterior Reversible Encephalopathy Syndrome (PRES)
• Retinal detachment^†
• Temporal arteritis^†
• Traumatic optic neuropathy
• Vitreous hemorrhage
• Stroke^†

^†Emergent Diagnosis

• 
  Central Retinal Vein Occlusion (CRVO)
• 
  Retinal detachment
• 
  CMV retinitis
• 
  Open-angle glaucoma (cupping)
• 
  Roth spots due to retinal vein occlusion (retinal hemorrhage)
• 
  Central retinal artery occlusion: cherry-red spot, retinal edema and narrowing of the vessels.

• Red eye
  • Bilateral red eyes
  • Unilateral red eye
  • Red eye (by symptoms)
  • Red eye (peds)
    • Neonatal conjunctivitis
• Periorbital swelling
• Acute vision loss (noninflamed)
• Acute onset flashers and floaters
• Painful eyes with normal exam