It is one of the main reasons for having blurred vision which many people are not aware of. It is stated to be one of the common reasons for having eyesight problems. This condition brings nearsightedness or farsightedness along with it.
It is caused mainly due to irregular shape of the cornea or of the lens which is located behind the cornea and is called as lenticular astigmatism. The problem can be corrected by use of eyeglasses, contact lenses or refractive surgery.
To put it in lay mans term astigmatism means that the cornea is oval in shape instead of being spherical. The cornea in the astigmatism condition has two curves – a steeper and a flatter curve. This kind of curve spreads the light to two focus points instead of one, leading to blurred vision.
Astigmatism is said to be hereditary as many are born with oblong cornea. Being born with this defect can create problems for future. Astigmatism is also caused due to scarring of the cornea by performing certain type of eye surgery. It is also caused due to keratoconus – a disease which causes thinning of the cornea.
Astigmatism leads to nearsightedness (myopia) when the cornea is...
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