What is Astigmatism?
Astigmatism is caused by an eye that is not completely round. Astigmatism occurs in nearly everybody to some degree. A person's eye is naturally shaped like a sphere. Under normal circumstances, when light enters the eye, it refracts, or bends, evenly, creating a clear view of the object.
However, the eye of a person with astigmatism is shaped more like a football or the back of a spoon. For this person, when light enters the eye it is refracted more in one direction than the other, allowing only part of the object to be in focus at one time. Objects at any distance can appear blurry and wavy.
Symptoms of Astigmatism
People with undetected astigmatism often have blurred vision, which can be associated with fatigue and eyestrain. While these symptoms may not necessarily be the result of astigmatism, you should schedule an eye exam if you are experiencing one or more symptoms.
Almost all degrees of astigmatism can be corrected with properly prescribed eyeglasses or contact lenses. For a person with only a slight degree of astigmatism, corrective lenses may not be needed at all, as long as other conditions, such as nearsightedness or farsightedness, are not present. If the astigmatism is moderate to high, however, corrective lenses are probably needed.
For Astigmatism, special soft contact lenses called Toric lenses are prescribed.Soft Toric lenses have greater light bending power in one direction than the other. Another option, particularly for higher amounts of astigmatism, is a breathable rigid contact lens. After performing various tests, your eye doctor will determine the ideal prescription for your astigmatism.
Another method for correcting astigmatism is by changing the shape of the cornea through refractive or laser eye surgery. While there is more than one type of refractive surgery, specific treatments are recommended on an individual basis. These refractive surgeries require healthy eyes that are free of Renal problems, Corneal Scars, and other Eye Diseases.