Astigmatism is when light rays entering the eye do not all meet at the same point (similar to a frayed string). This then results in blurred or distorted vision. The typical cause of this condition is an abnormally shaped cornea. Occasionally astigmatism exists in the lens of the eye. This condition can be corrected by a cylindrical (toric) eyeglass or contact lens. Astigmatism is usually hereditary. There are many people who are born with an oblong cornea. This may get worse over time. Astigmatism can also be caused from an eye injury that scarred the cornea. Refractive surgery may help certain types and severe astigmatisms. Discuss all of your options with your doctor.
David Green O.D., FAAO, Chad Green, O.D., FAAO, Shalini K. Vilsack, O.D.
