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Yellow fever retinopathy is an ocular manifestation of the yellow fever virus characterized by inflammatory changes and vascular damage within the retina. While the systemic symptoms of yellow fever are well-known, the specific retinal involvement involves white cotton-wool spots, retinal hemorrhages, and edema during the acute phase of the disease.
read more about yellow fever retinopathy ...The virus causes a systemic inflammatory response that can lead to "capillary leakage" in the eye. When the blood-retinal barrier is compromised, fluid and blood leak into the sensitive retinal tissues, appearing as yellow-white patches known as exudates or small red spots of blood.
Patients suffering from the virus may not notice the retinopathy initially due to severe systemic illness. However, those who do may report blurred vision, central blind spots (scotomas), or a general "haze" in their sight. An ophthalmoscopy exam is necessary to see the characteristic nerve fiber layer infarcts.
In most survivors, the retinopathy resolves as the systemic infection clears. However, if hemorrhages occur in the macula (the center of vision), there can be permanent scarring. Monitoring the retina during recovery is essential to differentiate between temporary viral inflammation and permanent vascular occlusion.
The primary prevention for this condition is the yellow fever vaccine. For those already infected, there is no specific "eye cure"; treatment focuses on supportive care for the systemic virus, which in turn allows the ocular tissues to heal and reabsorb the leaked fluids.
Total blindness is rare, but significant visual impairment can occur if the central retina is damaged by major hemorrhages during the toxic phase of the virus.
Retinal involvement is documented in a significant percentage of severe yellow fever cases, though it is often under-diagnosed in emergency settings.
Most "cotton-wool spots" and small hemorrhages associated with the virus will reabsorb over several weeks as the patient recovers.