The result is a blurry, indistinct view of objects seen at a distance. In the condition known as astigmatism the curvature of the cornea is not uniform. Instead, the cornea is shaped somewhat like the back of a spoon with one part being more curved than another. This results in no clear focus at any point. It is generally characterised by an eyeball that is too long in relation to the rest of its parts.
Light rays converge before they reach the retina and the brain receives a blurred image.
These people can usually see better close up than at a distance. The light rays do not have enough space to converge on the retina and so reach it without being focused. Astigmatism is the inability of the eye to focus clearly at any distance because the cornea is not symmetrical. The cornea is more curved in the one meridian than the other. It is shaped like a rugby ball in stead of a soccer ball.