Fuchs' dystrophy can be inherited, which means it can be passed down from parents to children. If either of your parents has the disease, you have a 50% chance of developing the condition.
However, the condition may also occur in persons without a known family history of the disease.
Fuchs' dystrophy is more common in women than in men. Vision problems usually do not appear before age 50, although doctors may be able to see signs of the disease in affected persons by their 30s or 40s.
Fuchs' dystrophy affects the thin layer of cells that line the back part of the cornea. These cells help pump excess fluid out of the cornea. As more and more cells are lost, fluid begins to build up in the cornea, causing swelling and a cloudy cornea.
At first, fluid may build up only during sleep, when the eye is closed. As the disease gets worse, small blisters may form. The blisters get bigger and may eventually break, causing eye pain. Fuchs' dystrophy can also cause the shape of the cornea to change, leading to more vision problems.