Astigmatism

Astigmatism arises when the cornea is not curved evenly in every direction but is shaped more like the back of a spoon than a section of a sphere. Light therefore does not converge to a single point and the image is blurred at all distances.

It is corrected with cylindrical spectacle lenses, toric contact lenses, a toric intraocular lens during cataract surgery, or a laser procedure.