A very common condition in which the cornea of the eye is asymmetrically curved, causing out-of-focus vision. The image does not focus on the retina in a sharp point. The cause of astigmatism is unknown. It is usually present from birth, and often occurs together with nearsightedness or farsightedness. A minor degree of astigmatism is considered normal and does not require correction.
Symptoms Blurry vision for distance and near.
Treatment Astigmatism is easily diagnosed by a standard ophthalmic exam with refraction test. Children or others who cannot respond to questions can have their refractive error measured by a test using reflected light called retinoscopy.