What is Astigmatism?
Astigmatism is a common condition which occurs when the cornea (the clear front surface of your eye) or the lens inside your eye are irregularly shaped.
Normally the cornea and the lens are smooth and curve equally in all directions, like a soccer ball. This enables light rays to focus directly onto your retina (the camera film at the back of your eye).
When the cornea or lens are not smooth or regularly shaped, like an AFL football, light rays aren’t refracted (bent) properly onto the retina, causing blurry vision at any distance.
If the cornea alone is irregularly shaped, you have corneal astigmatism, and if the lens is distorted, you have lenticular astigmatism.
Astigmatism often occurs with other vision conditions such as myopia (nearsightedness) and hyperopia (farsightedness). Together these conditions are called refractive errors because they affect how your eyes bend or refract light.