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Munson's Sign: An Obvious Finding to Explain Acute Vision Loss
Jake Gold1, Vijai Chauhan1, Siripong Rojanasthien2
1Saint Louis University, Department of Emergency Medicine, St. Louis, Missouri.
Clinical Practice and Cases in Emergency Medicine
|August 13, 2019
Summary
Acute corneal hydrops, a complication of keratoconus, causes sudden vision loss. Munson's sign, a visible eyelid change, can help identify keratoconus in patients with this condition.
Area of Science:
- Ophthalmology
- Corneal Diseases
- Ocular Surface Disorders
Background:
- Keratoconus is a progressive corneal ectasia leading to structural weakening and a conical shape.
- This weakening increases susceptibility to acute corneal hydrops, characterized by a Descemet's membrane break.
- Acute corneal hydrops causes significant ocular pain and sudden vision impairment.
Purpose of the Study:
- To present a case of acute corneal hydrops as a cause of sudden vision loss.
- To illustrate Munson's sign as a clinical indicator of advanced keratoconus.
- To emphasize the diagnostic utility of Munson's sign in suspected acute corneal hydrops.
Main Methods:
- Case report presentation.
- Clinical examination including assessment for Munson's sign.
- Review of literature regarding keratoconus and acute corneal hydrops.
Main Results:
- A case of acute corneal hydrops in a patient with keratoconus was documented.
- The characteristic V-shaped protrusion of the lower eyelid (Munson's sign) was observed during downward gaze.
- Munson's sign served as a key identifier for underlying advanced keratoconus.
Conclusions:
- Acute corneal hydrops is a significant cause of vision loss in keratoconus patients.
- Munson's sign is a simple, valuable clinical sign for identifying keratoconus.
- Early identification of keratoconus through signs like Munson's sign is crucial for timely management.