What if I have cataracts AND astigmatism?
For cataract patients with astigmatism, successful cataract surgery is only half the battle for regaining quality vision. Astigmatism is a common vision problem, but most people don’t know what it is. It may accompany nearsightedness or farsightedness and is usually caused by a misshapen cornea (called corneal astigmatism).
In a normal eye, with a round corneal curve, light rays passing through the cornea bend towards the center and focus exactly at one spot on the retina. With corneal astigmatism, the surface of the cornea has an uneven curvature. As a result, light rays are not focused at one spot on the retina and your vision becomes distorted.
If you have only a small amount of astigmatism, you may not notice it or have just slightly blurred vision. But sometimes uncorrected astigmatism can give you headaches or eye strain, and distort or blur your vision at all distances.