The infection can also be transmitted by a pregnant woman to her baby, causing more severe disease. In many cases, however, the cause cannot be determined. The condition is painless but causes blurred vision. Children who have the disease in one eye may develop amblyopia. The closer to the macula, the more likely the loss of clear vision in the center of the field of vision.
Therapy consists of steroids to control the inflammation.
In congenital infections, drugs to suppress the immune system may be necessary. The retina is nourished and cleansed by a set of tiny blood vessels, the retinal arteries and the retinal veins. Anything that interferes with blood flow through these vessels threatens the health of the retinal cells crucial to good vision. The symptoms depend on the type of vessel being blocked. When an artery is obstructed, the retina it supplies stops functioning, causing blindness in part or all of one eye.