Accessed 3/14/23.Īstigmatism is caused by an imperfection in the shape of your cornea (the surface layer of your eye ) or lens (an interior part of the eye that helps it to focus) that forms a clear dome in front of the colored part of your eye, the iris. The issue, however, is very common in America with approximately one-third of Americans having astigmatism Astigmatism: Top 9 FAQs. Treasure Island (FL): StatPearls Publishing 2022 Jan. Research indicates that astigmatism accounts for roughly 13% of refractive errors (vision problems that make it difficult to see clearly) Gurnani B, Kaur K. If you’re experiencing headaches, blurred vision, eye strain or trouble seeing at night, you may have a common eye condition called astigmatism.

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