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C3 - Vision Loss - History

Mel Herbert, MD MBBS FAAEM, Jessica Mason, MD, and Stuart Swadron, MD, FRCPC
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C3 2019 01 January - Vision Loss Written Summary 317 KB - PDF

C3 - Vision Loss - History

Jessica Mason MD, Stuart Swadron MD, Mel Herbert MD

Peer Reviewer Nicholas Testa, MD

* Drug doses are a guide only, always check a second source and follow local practice guideline

CRITICAL DIFFERENTIAL DIAGNOSIS

  • Painless
    • Central retinal artery occlusion (CRAO)
    • Central retinal vein occlusion (CRVO)
    • Retinal detachment
    • Vitreous hemorrhage
    • Stroke syndromes
  • Painful
    • Acute glaucoma
    • Optic neuritis
    • Giant cell arteritis
  • Although more benign (not sight-threatening) causes of acute blindness exist, these diagnoses should only be made after the above causes are excluded:
    • Migraine headaches can cause transient visual loss, which may precede or follow the actual headache
    • Transient blindness can occur following head trauma / concussion
    • Psychogenic blindness, a conversion syndrome, is usually painless and is a diagnosis of exclusion
  • Most causes of sight threatening blindness are monocular, with the notable exception of stroke and other intracranial pathology, which typically involves both eyes (e.g. a left-sided hemianopsia)

 

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C3 - Vision Loss Full episode audio for MD edition 54:23 min - 51 MB - M4AC3 2019 01 January Vision Loss Board Review Answers 242 KB - PDFC3 2019 01 January Vision Loss Board Review Questions 237 KB - PDFC3 2019 01 January - Vision Loss Individual MP3s 74 MB - ZIPC3 2019 01 January - Vision Loss Written Summary 317 KB - PDF