Correcting Astigmatism with LASIK
One of the most common eye conditions is astigmatism. It occurs when there is imperfection in the curvature of the eye. Instead of the cornea being spherical like a basketball, it becomes oval like a football. This causes the eye to be refracted in more than one direction when light enters. Astigmatism can be hereditary or a result of pressure from the eyelids on the cornea and increased stress on the eyes.
What are the Effects of Astigmatism?
Astigmatism can occur in different levels. For starters, most people with very mild astigmatism do not even realize they have it. In mild astigmatism, slight blurred vision, headaches and eyestrain are the usual symptoms. Meanwhile, there is distortion and blurring of their vision at near and far distances for people with more moderate astigmatism. It is also important to know that children have equal chances of developing astigmatism like adults.
There are two different forms of astigmatism. Regular astigmatism occurs when the meridians which house the curves of the cornea are 180 degrees apart. On the other hand, irregular astigmatism is when there is more than one meridian and the meridians are usually located at any other distance. Among the two, atigmatism correction in the regular form is easier.
When should you see a Doctor?
If you feel that the quality of your vision interferes with your daily task, it is advisable to see an eye doctor. The eye doctor can determine your eye condition and give advice if you need astigmatism correction or even laser eye surgery. For healthy adults over 40 years old, it is recommended to have your eyes examined every two to four years until you are 55 years old. After that age, have your eyes checked every one to three years for signs of eye problems. After the age of 65 years old, have your eyes checked every one to two years.
How is Astigmatism Diagnosed?
There are several ways that the eye doctor can do to diagnose astigmatism. First, they can measure reflected light from the surface of the cornea using a keratometer. This device will quantify the amount and orientation of corneal astigmatism. Second, they can also measure the curvature of your cornea using a keratoscope. It will confirm the presence and degree of astigmatism. Lastly, corneal topography using a
videokeratoscope can be done to measure the change in corneal surface curvature.
What is the Treatment for Astigmatism?
Usually, glasses or contacts can be worn to lessen the interference of astigmatism, however, they are not a cure; they are only a visual aid; these lenses have greater light bending power in one direction than the other. they may even contain a prescription for farsightedness or nearsightedness if you need it. For cases of severe astigmatism, a need for refractive surgery, like LASIK surgery may arise.
How Can LASIK Eye Surgery Correct Astigmatism?
The main advantage of LASIK surgery is that it is the only treatment that addresses the main source of the problem, rather than just simply treating the symptoms. LASIK flattens the steeper curve of the cornea
with laser pulses. It helps in decreasing the cornea’s oblong shape thus creating a more spherical form. By decreasing the angle of the sharper curve, LASIK eye surgery enables the eye to focus light more effectively, which results in a clearer vision.
The Excimer Laser is duly approved by the FDA. It is able to correct farsightedness from +1.00 to _6.00 with 1.00d of astigmatism and correct nearsightedness from -12.00D with 4.00 D of astigmatism. Since LASIK is
a delicate procedure, it is important to get a skilled doctor who has lots of experience in this area. It is also important to be aware that laser eye surgery is contraindicated in people who are under 18 years old, pregnant, nursing or taking some medications.
Astigmatism is an eye condition involving the cornea becoming spherical in shape. It has two forms which are regular astigmatism and irregular astigmatism. Depending on the severity of condition, astigmatism can be treated in a number of ways like eyeglasses, contact lens and even LASIK surgery.
For more information about astigmatism and LASIK refer to the links below:
- Online Astigmatism Test
- LASIK for Astigmatism Video
- Astigmatism Correction Surgery
- Astigmatism and Contact Lenses
- Test Astigmatism with a Fan Chart
- Astigmatism Refractive Surgery
- Overview of Astigmatism
- A Guide on Laser Eye Surgery for Astigmatism
- The Causes of Astigmatism and How the Eye Works
- A Flash Site on How LASIK Corrects Astigmatism
- Advanced Laser Eye Surgery in Fixing Astigmatism
- The Involvement of LASIK Surgery in Astigmatism
- Correction of Irregular Astigmatism Through LASIK
- The American Optometric Association: Astigmatism
- The Definition, Causes, Symptoms, and Treatment of Astigmatism
- A Detailed Description of Astigmatism