Astigmatism is a common eye condition which causes blurred and distorted vision at distance and near. It is characterized by the imperfections in the shape of the cornea and lens of the eye. This condition usually develops in childhood. However, it is possible to have mild astigmatism and not know it. This is especially common when you have blurred vision at night but at other times you may not notice any distortions in your vision. There are two type of astigmatism, regular and irregular. Irregular astigmatism is less common and can be caused by an eye condition such as keratoconus or from an eye injury and may cause more distortion in vision.
Astigmatism can be treated with a spectacle prescription. However, high or irregular astigmatism can result in the need for specialty contact lenses.