Many people feel astigmatism is a bad, progressive disease. Actually, astigmatism is caused when light focuses in two points in the back of the eye because the eye is not in the shape of a sphere. An eye with astigmatism has often been described as being in the shape of an egg or football. To some degree that is true, though an astigmatic eye is not exaggerated to that degree. Most people have some astigmatism. Visually, a person with uncorrected astigmatism will often see a faint shadow on letters or objects.
How Do You Get Astigmatism?
Most people have some astigmatism. The amount of astigmatism, however, can change due to things such as trauma, scarring, corneal dystrophies, and intra-ocular lens dislocation.