What is astigmatism? and what causes it?

Question

Can astigmatism make a bright object seem more dominant and cause a glare to the surrounding area thats not as bright?

Answer 1

Eye mishapend: astigmatism is when the eye or its structures are not round (spherical). It commonly is on the cornes but may be in the lens or the shape of the eye itself.

Answer 2

Irregular Cornea: Astigmatism usually is caused by an irregularly shaped cornea. Instead of the cornea having a symmetrically round shape (like a baseball), it is shaped more like a football, with one meridian being significantly more curved than the meridian perpendicular to it. Astigmatism usually causes vision to be blurred or distorted to some degree at all distances.

Answer 3

Eye growth: Mosty astigmatism is due to the way the eye develops as it grows and is due to differential growth in one axis causing an ovalness of the need for glasses. Some astigmatism can also be from eye trauma.

Answer 4

Refractive Error: Here is a great article by mayo clinic: http://www.Mayoclinic.Com/health/astigmatism/ds00230/dsection=causes. Astigmatism has to do with distortions of the curves in the cornea or the lens of the eye.

Answer 5

Cornea, lens: In astigmatism, light that enters the eye is refracted more in one direction than the other, allowing only part of the object to be in focus at one time. 95% of the time, this is caused by differences in curvature in different axes of the cornea on the front of the eye. The cornea does 2/3 of the focusing of light in the eye. The other 1/3 is done by the lens, which causes 5% of astigmatism.

Answer 6

Oval eye shape: Refractive errors require either plus (farsighted) or minus (nearsighted) glasses + an extra amount if the eye is oval in shape (astigmatism). These are called refractive errors and can be corrected with glasses or contacts. The list of other eye problems is long and these are usually unrelated to astigmatism.

Answer 7

Astigmatism: Astigmatism is one type of refractive error. Myopia (or nearsightedness), hyperopa (or farsightedness), and astigmatism all can cause refractive error. Refractive error is what causes a patient to require glasses or contact lenses to see better. Astigmatism is typically when the cornea is shaped more like a football than a basketball. Glasses, contact, and LASIK can fix this problem.

Answer 8

Corneal curvature: Astigmatism just means that your cornea is not perfectly spherically shaped and instead has different curvatures in different directions (kind of like a football in the extreme example). Everyone has some degree of astigmatism although not everyone has enough to notice it. I doubt you "need" any surgery.

Answer 9

Astigmatism: Astigmatism is one type of refractive error. Myopia (or nearsightedness), hyperopa (or farsightedness), and astigmatism all can cause refractive error. Refractive error is what causes a patient to require glasses or contact lenses to see better. Astigmatism is typically when the cornea is shaped more like a football than a basketball. Glasses, contact, and LASIK can fix this problem.

What is astigmatism? and what causes it?

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