Astigmatism is a common refractive error where the eye focuses light at different points in different meridians, usually due to an irregular corneal shape. It can cause blurred or distorted vision at all distances.
Symptoms and types
Severity and axis determine visual impact.
- Blurred or ghosted images, eye strain, and headaches
- With-the-rule, against-the-rule, or oblique astigmatism patterns
- Can occur with myopia or hyperopia
- Regular astigmatism is correctable; irregular forms suggest corneal disease
Correction options
Several methods can provide clear vision.
- Glasses with cylindrical lenses
- Toric soft or rigid contact lenses
- Laser refractive surgery or lens-based procedures in suitable adults
- Monitoring for keratoconus or ectasia if astigmatism is high or changes rapidly
