Astigmatism is a visual condition that causes blurred vision due to the irregular shape of the cornea. This prevents light from focusing properly on the retina. As a result, vision becomes blurred at any distance.
Astigmatism often accompanies other visual conditions like myopia and hyperopia.
The cause of astigmatism is tension in the eye muscles and there are three primary types of it:
You can find out if you have astigmatism here.