Meaning of the word astigmatism in English

What does astigmatism mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

astigmatism

US /əˈstɪɡ.mə.tɪ.zəm/
UK /əˈstɪɡ.mə.tɪ.zəm/

Noun

a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focal point

Example:
She has severe astigmatism and needs special corrective lenses.
Many people don't realize they have astigmatism until they get an eye exam.