Astigmatism is a common eye condition that causes blurry vision. People with astigmatism typically have an irregularly shaped cornea, which prevents light from being focused properly on the retina. The result is that people with astigmatism may experience blurred or distorted vision at all distances. People who do not have astigmatism, on the other hand, typically have a regular, round cornea that allows light to be focused correctly on the retina. Without astigmatism, people are able to see clearly at all distances.
Types of Astigmatism
Astigmatism can be divided into two main types: regular astigmatism and irregular astigmatism. Regular astigmatism is the most common type and is caused by an uneven curvature of the cornea. In this condition, objects at all distances may appear blurred or distorted. Irregular astigmatism, on the other hand, is caused by an irregular shape of the cornea, which may be the result of an injury or other eye condition.
How Astigmatism Affects Vision
People with astigmatism may experience a variety of vision problems. They may find it difficult to focus on objects at all distances, or they may experience double vision. They may also experience headaches, eyestrain, and fatigue after prolonged periods of reading or other activities that require focusing on objects up close.
Treating Astigmatism
Astigmatism can be treated with corrective eyeglasses, contact lenses, or refractive surgery. In some cases, eyeglasses or contact lenses may be enough to correct the vision problems caused by astigmatism. In other cases, refractive surgery, such as LASIK, may be recommended.
What Do People Without Astigmatism See?
People who do not have astigmatism typically have clear vision at all distances. They may be able to see objects in distant and near vision without any blurriness or distortion. They may also have better vision at night and in dimly lit environments.