## Overview Prolapse or prominence of the third eyelid is a useful diagnostic sign. Bilateral prominence triggered by stimulation suggests tetanus. Unilateral prominence indicates eye pain (such as a corneal ulcer). Bilateral persistent prominence can occur with dehydration or sedation. Retraction of the globe makes the third eyelid more visible. ## What It Indicates Tetanus, ocular pain, dehydration, or sedation, depending on laterality and triggers. ## Diagnosis Observation in context. Examine the eye and assess for tetanus or dehydration. ## Treatment Directed at the underlying cause. ## Recovery and Prognosis Depends on the cause. ## Prevention Depends on etiology.
visible third eyelid covering part of the eye; bilateral and stimulus-triggered in tetanus; unilateral with eye pain; bilateral and persistent with dehydration
## Overview Prolapse or prominence of the third eyelid is a useful diagnostic sign. Bilateral prominence triggered by stimulation suggests tetanus. Unilateral prominence indicates eye pain (such as a corneal ulcer). Bilateral persistent prominence can occur with dehydration or sedation. Retraction of the globe makes the third eyelid more visible. ## What It Indicates Tetanus, ocular pain, dehydration, or sedation, depending on laterality and triggers. ## Diagnosis Observation in context. Examine the eye and assess for tetanus or dehydration. ## Treatment Directed at the underlying cause. ## Recovery and Prognosis Depends on the cause. ## Prevention Depends on etiology.
visible third eyelid covering part of the eye; bilateral and stimulus-triggered in tetanus; unilateral with eye pain; bilateral and persistent with dehydration