Astigmatism is a common eye condition that affects vision by causing blurred or distorted images. It is caused by an irregularly shaped cornea, or front surface of the eye. Astigmatism can occur in people of all ages and is usually present at birth. It may worsen over time, however, and can be caused by certain eye diseases and injuries.
What Causes Astigmatism?
Astigmatism is caused by an irregularly shaped cornea. The cornea is the clear, curved front surface of the eye. In people with astigmatism, the cornea is curved more in one direction than in the other. This causes light to be focused differently on the retina, resulting in blurred or distorted vision.
What Are the Symptoms of Astigmatism?
The most common symptom of astigmatism is blurred or distorted vision. Other symptoms may include headaches, eyestrain, squinting, and difficulty seeing at night.
How Is Astigmatism Diagnosed?
Astigmatism can be diagnosed during an eye exam. During the exam, your eye doctor will use a special instrument called a retinoscope to measure the curvature of your cornea. They may also use a slit lamp to look at the front surface of the eye.
How Is Astigmatism Treated?
Astigmatism is usually treated with eyeglasses or contact lenses. These lenses help to correct the irregular curvature of the cornea and improve vision. In some cases, surgery may be recommended to reshape the cornea and improve vision.
Can Astigmatism Be Prevented?
Astigmatism is usually present at birth and cannot be prevented. However, you can take steps to protect your eyes and maintain good vision. These steps include wearing protective eyewear, eating a healthy diet, and having regular eye exams.