The cause of astigmatism is unknown. It is usually present from birth, and often occurs together with nearsightedness or farsightedness. A minor degree of astigmatism is considered normal and does not require correction. Astigmatism is very common.
Astigmatism may sometimes develop due after eye surgery or following an eye injury . Additionally, severe astigmatism may result from a somewhat rare condition called keratoconus , which is a degenerative non-inflammatory disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve.
What are the causes of Astigmatism?
The cause of astigmatism is unknown. It is usually present from birth, and often occurs together with nearsightedness or farsightedness. A minor degree of astigmatism is considered normal and does not require correction. Astigmatism is very common.
Astigmatism may sometimes develop due after eye surgery or following an eye injury . Additionally, severe astigmatism may result from a somewhat rare condition called keratoconus , which is a degenerative non-inflammatory disorder of the eye in which structural changes within the cornea cause it to thin and change to a more conical shape than its normal gradual curve.