Astigmatism is a common vision problem caused by an error in the shape of the cornea. Learn about the different types, their symptoms, and how they're treated.

Astigmatism is a common eye condition in which an incorrectly curved cornea or lens causes blurred vision. Glasses or lenses can usually correct it, but some people may want laser surgery.

Astigmatism is a term that refers to an imperfection in the shape of the cornea. Rather than being a clear, round dome to cover the iris and the pupil of the eye in an even curved shape, the ...

Regular or corneal astigmatism. This is the most common type, which involves the cornea, or crystalline lens, curving in more than one direction. It’s shaped like an oval instead of a sphere.

The cornea is usually round like a sphere, but people with astigmatism have oval-shaped corneas. This shape changes how light rays enter the eye, leading to blurred vision.

Regular astigmatism. Irregular corneal or lens curvature of the eye causes regular astigmatism. In this condition, the principal meridians are always 90˚ apart from each other and, ...

Using measurements obtained by corneal topography, patients with symmetric bow tie corneal astigmatism can be placed into one of four categories for planning purposes. These categories are shown ...

In a cohort of 21,655 children ages 6 to 8 years, the prevalence rate of refractive astigmatism of at least 1.0 diopter (D) increased from 21.4% in 2015 to 34.7% in 2022-2023, and corneal ...

Recovery of corneal sensation is quicker and dry eyes last shorter after SMILE than with LASIK. Currently, the procedure is approved only for myopia and astigmatism.

The cornea is usually round like a sphere, but people with astigmatism have oval-shaped corneas. This shape changes how light rays enter the eye, leading to blurred vision.