Astigmatism is a common eye condition where the shape of the eye prevents light from focusing properly on the retina, causing blurry or distorted vision. The cornea, the clear front part of the eye, is not curved equally in all directions, which affects how light rays bend and the clarity of vision. Astigmatism can be diagnosed with an eye exam that involves a series of tests to check eye health and a refraction, which determines how the eyes bend light.

Astigmatism can be corrected with glasses, contact lenses, or refractive surgery. Corrective lenses work by counteracting uneven curvatures of the cornea or lens. Eyeglasses and contact lenses can correct most astigmatism, and they are available in a variety of types and styles. Contact lenses are also used in a procedure called orthokeratology, where rigid contact lenses are worn during the night while sleeping until the curvature of the eye evens out. Refractive surgery, such as LASIK, can also be used to correct astigmatism. The most appropriate correction method depends on the individuals vision needs and lifestyle.

In summary, astigmatism is a common eye condition that causes blurry or distorted vision due to the shape of the eye. It can be diagnosed with an eye exam and corrected with glasses, contact lenses, or refractive surgery.