What Is Astigmatism?
Astigmatism is a condition that occurs as a result of an error in the structure and shape of the cornea. To understand astigmatism, it is necessary to look at the structure of the eye. The front area of the eye is the cornea, behind which is the lens of the eye. A normal cornea has a regular convex curve. When the corneal curve becomes irregular, astigmatism happens.
Normally, light passes through the cornea, the lens, and the eye fluid, and ends up on the retina. However, in case of astigmatism, the light does not pass normally, because it is distorted. This causes disturbed vision. Besides astigmatism, two other problems associated with how light refracts or passes through the eye are farsightedness (hyperopia) and nearsightedness (myopia).
