Astigmatism (uh-STIG-muh-tiz-um) is a type of refractive error. Astigmatism is a common and generally treatable vision issue that occurs when the cornea (clear part in the front of the eye) is not completely round. It is curved more like an egg, rather than round like a basketball. Astigmatism causes blurred distance and near vision.
People with severe astigmatism may experience blurred or distorted vision, eyestrain, and have difficulty with night vision.
An ophthalmologist (an eye doctor with a medical degree: MD or DO) or an optometrist (an eye doctor with an OD degree) will conduct an eye examination to find out if you have astigmatism.
A range of treatments are available. Your ophthalmologist or optometrist will work with you to identify the right treatment. This may include eyeglasses, contact lenses, or other treatments to help you see clearly.