The cornea and lens are also responsible for focusing incoming light on to the retina to create a clear image. To work properly, the cornea needs to be perfectly curved, like the surface of a football. However, in astigmatism the cornea is shaped irregularly, like the surface of a rugby ball.
Celiac disease. Celiac disease is an autoimmune disease in which people canât eat gluten because it will damage their small intestine. If you have celiac disease and eat foods with gluten, your immune system responds by damaging the small intestine. Gluten is a protein found in wheat, rye, and barley.
What is celiac disease? Celiac disease is an autoimmune disease characterized by an inappropriate immune response to gluten, a protein found in wheat, and to related dietary proteins in rye and barley. This response leads to inflammation of the small intestine and to damage and destruction of the villi that line the intestinal wall.