Explain what causes astigmatism?

Answer 1

Astigmatism

What is astigmatism?
Astigmatism occurs when the front surface of your eye (cornea) or the lens inside the eye is slightly irregular in shape, resulting in vision being blurred at all distances. Astigmatism is not a disease, but is actually a vision condition that is quite common.

What causes astigmatism?
When the front of your eye or the lens inside the eye is more oval than round, light does not focus properly on the back of your eye (retina). The causes of this irregular shape are unclear. In some cases, it may be hereditary or it may result from such factors as pressure of the eyelids on the cornea.

How common is astigmatism?
Most people have some degree of astigmatism. However, only moderate to highly astigmatic eyes may need corrective lenses.

What are signs/symptoms of astigmatism?
People with severe astigmatism will usually have blurred or distorted vision. Those with mild astigmatism may experience headaches, eye strain, fatigue or blurred vision at certain distances.

How is astigmatism diagnosed?
A comprehensive eye examination by your doctor of optometry will include tests for astigmatism.

Can astigmatism by corrected?
Almost all levels of astigmatism can be optically corrected with properly prescribed and fitted eyeglasses or contact lenses.

Does astigmatism get progressively worse?
Astigmatism may increase slowly. Regular optometric care can, however, help to insure that proper vision is maintained.

How will astigmatism affect my lifestyle?
You may have to adjust to wearing eyeglasses or contact lenses if you do not wear them now. Other than that, astigmatism probably will not significantly affect your lifestyle at all.

For more information, ask your optometrist.

Answer 2

Causes Of Astigmatism

Answer 3

What causes astigmatism?
Nearsightedness, or myopia, occurs when the cornea is too steeply curved or when the eye is more elongated than normal, causing light rays to focus in front of the retina. With farsightedness, or hyperopia, the cornea itself is flatter than normal or the eye is shorter from front to rear, resulting in too short a distance from the retina. If the cornea is uneven in shape, the result is astigmatism, which causes light rays to be bent out of focus, either horizontally or vertically, resulting in distorted vision at all distances.

Astigmatism is prevalent and, in most cases, if you have it, you were born with it. Just as your hands are shaped differently from other people's hands, so are your eyes. Eyelid swelling, corneal scars, and keratoconus, a rare condition that causes the cornea to be misshapen, can also cause astigmatism.

Answer 4

People with diabetes commonly develop lenticular astigmatism because high blood sugar levels can cause the lens to change shape. Diabetics face a significantly higher risk of cataracts.

Answer 5

When the front of your eye or the lens inside the eye is more oval than round, light does not focus properly on the back of your eye (retina). The causes of this irregular shape are unclear. In some cases, it may be hereditary or it may result from such factors as pressure of the eyelids on the cornea.

Answer 6

Astigmatism usually occurs when the front surface of the eye, the cornea, has an irregular curvature

Answer 7

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Answer 8

astigmatism is when you cornea isn't completely round or curved it has a wave in it

Answer 9

http://www.medindia.net/patients/patientinfo/astigmatism_causes.htm
Check out this site for a good description.

Answer 10

cause eyesight problems, could be your diet or passed down through family