Astigmatism is a common vision condition that causes blurred vision. It occurs when the cornea (the clear front cover of the eye) is irregularly shaped or sometimes because of the curvature of the lens inside the eye.
An irregularly shaped cornea or lens prevents light from focusing properly on the retina, the light-sensitive surface at the back of the eye. As a result, vision becomes blurred at any distance. This can lead to eye discomfort and headaches. Most people have some degree of astigmatism. Slight astigmatism usually doesn’t affect vision or require treatment.
Astigmatism frequently occurs with other vision conditions like myopia (nearsightedness) and hyperopia (farsightedness). Together these vision conditions are referred to as refractive errors because they affect how the eyes bend or “refract” light. The specific cause of astigmatism is unknown. It can be hereditary and is usually present from birth. It can decrease or increase over time.
A comprehensive optometric examination will include testing for astigmatism. If necessary, your optometrist can provide eyeglasses or contact lenses that correct the astigmatism by altering the way light enters the eyes.
An optometrist can diagnose an astigmatism through a comprehensive eye examination. Testing for astigmatism measures how the eyes focus light and determines the power of any optical lenses needed to improve vision. This examination may include:
People with astigmatism have several options to regain clear vision. They include:
Refined trans PRK is the latest therapy technique for astigmatism. In this method, the cornea is completely modified to treat astigmatism. In this method, the laser radiation for each patient is adjusted individually based on demographic parameters (such as age and sex) and individual optical characteristics. The results of treatment of astigmatism have improved significantly due to the adaptation of the operating conditions to the patient’s condition. So that the success rate of surgery and visual acuity in these individuals has increased dramatically.