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.
Celiac disease also is more common among people with type 1 diabetes and other autoimmune conditions, including autoimmune thyroid disease. According to researchers, there is a clear relationship between celiac disease and autoimmune thyroid disease. 1  Celiac disease is found in from 2 to 5 percent of patients with autoimmune thyroid disease. 2  Patients with celiac disease are three times more likely to have thyroid disease.