Congenital stromal corneal dystrophy is a rare, inherited eye disorder that affects the cornea, the clear outer layer of the eye. It is characterized by the presence of small, white, opaque spots in the cornea, which can cause vision problems. The spots are caused by an abnormal accumulation of collagen fibers in the cornea. Symptoms of the disorder usually appear in infancy or early childhood and can include blurred vision, sensitivity to light, and difficulty seeing in dim light. Treatment typically involves the use of special contact lenses or corneal transplantation.