Introduction on Astigmatism
Astigmatism is one of the commonest eye problems besides nearsightedness and farsightedness.
And study shows people with nearsightedness and farsightedness are highly possible to suffer from astigmatism.
Astigmatism makes people not able to see clearly as the refractive error reduces people's focusing ability and causes them unable to focus on a single point.
If you have the desire to know much about astigmatism, please read ahead, and the following will give more introductions on the causes and how to treat this eye disease.
What are causes for astigmatism? For people with good normal vision, their corneas are like domes in round shape.
But for people with astigmatism, their corneas look like spoons, with one side curved more than the other, which will lead to blurred vision.
Some people may hold on the opinion that astigmatism is caused by the front surface of our cornea out of shape, but as a matter of fact, the misshaped back part of our cornea can also contribute to astigmatism.
We should bear in mind that our eyes are based on two-lens system, so if one is out of shape, people will suffer from astigmatism.
Concerning the treatments for astigmatism, laser surgery is no doubt the main one.
By laser surgery, eye doctor will use a laser to remove the tissue from the cornea in order to repair people's misshaped cornea and get the desired shape.
Through the surgery, the cornea will be shaped like soup bowl instead of spoon.
Besides, broad-beam laser eye surgery is also widely used to treat astigmatism.
This is mainly done by computer, so it is more accurate to some extent.
By taking this surgery, people's eye surfaces will be digitized into computer, and then the computer will give accurate measurement and calibration by specialized software.
After this, eye doctor will use the laser to get the desired shape of cornea according to computer's instructions.
Though laser eye surgery is very popular and proves to be effective in treating astigmatism for some people, this does not mean it can treat all astigmatism.
Actually, if the astigmatism is due to the front part of cornea being out of shape, we can resort to laser eye surgery for help.
But if it is caused by combination of misshaped front and back parts of cornea, the treating result will be different to say.
If there are big differences between front and back parts of cornea, the successful rate of the surgery will be lower.
And study shows people with nearsightedness and farsightedness are highly possible to suffer from astigmatism.
Astigmatism makes people not able to see clearly as the refractive error reduces people's focusing ability and causes them unable to focus on a single point.
If you have the desire to know much about astigmatism, please read ahead, and the following will give more introductions on the causes and how to treat this eye disease.
What are causes for astigmatism? For people with good normal vision, their corneas are like domes in round shape.
But for people with astigmatism, their corneas look like spoons, with one side curved more than the other, which will lead to blurred vision.
Some people may hold on the opinion that astigmatism is caused by the front surface of our cornea out of shape, but as a matter of fact, the misshaped back part of our cornea can also contribute to astigmatism.
We should bear in mind that our eyes are based on two-lens system, so if one is out of shape, people will suffer from astigmatism.
Concerning the treatments for astigmatism, laser surgery is no doubt the main one.
By laser surgery, eye doctor will use a laser to remove the tissue from the cornea in order to repair people's misshaped cornea and get the desired shape.
Through the surgery, the cornea will be shaped like soup bowl instead of spoon.
Besides, broad-beam laser eye surgery is also widely used to treat astigmatism.
This is mainly done by computer, so it is more accurate to some extent.
By taking this surgery, people's eye surfaces will be digitized into computer, and then the computer will give accurate measurement and calibration by specialized software.
After this, eye doctor will use the laser to get the desired shape of cornea according to computer's instructions.
Though laser eye surgery is very popular and proves to be effective in treating astigmatism for some people, this does not mean it can treat all astigmatism.
Actually, if the astigmatism is due to the front part of cornea being out of shape, we can resort to laser eye surgery for help.
But if it is caused by combination of misshaped front and back parts of cornea, the treating result will be different to say.
If there are big differences between front and back parts of cornea, the successful rate of the surgery will be lower.
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