II. Epidemiology
- Age of onset: 5-8 years old (mean)
- Incidence: 700 cases per year in United States
III. Pathophysiology
- Roundworm infection (Toxocariasis)
- Spreads to eye from concurrent Visceral Larva Migrans
IV. Symptoms
- Gradual or sudden unilateral visual loss
- Eye discomfort
- Symptoms of Visceral Larva Migrans often absent
- Strabismus
V. Signs: Slit Lamp Exam
VI. Labs
- Eosinophilia (rare)
- Eosinophils in Aqueous Humor
VII. Differential Diagnosis
- Retinoblastoma
- Strabismus
- Exudative retinitis (Coat's disease)
VIII. Complications
- Ocular inflammation with scarring with risk of Vision Loss
IX. Course
- Ocular symptoms may present up to 10 years after infection
X. Management
- No satisfactory treatment
- Trial of Corticosteroids
- Surgery may be indicated in severe cases
- See Visceral Larva Migrans