1. Plural of astigmatism; refractive errors of the eye in which the cornea or lens has an irregular shape, causing blurred or distorted vision at all distances.
Usage: Medical/optical term; Plural form

Examples

• The optometrist diagnosed astigmias in both of her eyes during the eye exam.
• Mild astigmias can often be corrected with eyeglasses or contact lenses.
• Children with uncorrected astigmias may struggle to see the board clearly at school.
• The doctor explained that astigmias occur when the eye's surface is not perfectly spherical.
• Many people have astigmias combined with myopia or hyperopia.