About this condition
With astigmatism, letters may look stretched, outlines may appear doubled or both distance and near objects may lose sharpness. Symptoms can include squinting or fatigue after reading. A small amount of astigmatism may cause few complaints, while subjective difficulty also depends on lighting and other refractive errors.
Clinical features
The refractive error may occur together with myopia or hyperopia. It can be present in childhood and affect visual development. If astigmatism changes rapidly, especially in one eye, an ophthalmologist should consider other corneal conditions rather than repeatedly changing a prescription without investigation.
Important differences and warning signs
An examination uses visual-acuity testing, autorefractometry and refinement of the spectacle prescription. If findings are unusual, the clinician may recommend additional assessment of the cornea. One machine reading does not replace a clinical examination and a check of how the correction works in practice.
Assessment and individual care
Correction may involve spectacle lenses with cylindrical power or suitable contact lenses. Some people need time to adjust to a new prescription. Persistent discomfort or poor vision should prompt reassessment rather than forcing continued use of unsuitable lenses.
Related information: Myopia; Choosing glasses or contacts.
Signs and symptoms
- Blurred or distorted contours both near and far.
- Squinting, eye fatigue or headaches after detailed visual tasks.
- Occasionally little noticeable discomfort despite measurable refractive error.
Diagnosis and tests
Visual acuity, refraction and prescription refinement are central; corneal assessment is considered if the course is atypical or progressive.
Care and treatment approaches
Glasses with cylindrical correction or professionally fitted contact lenses may help. Follow-up and adaptation advice depend on the findings.
When to seek urgent care
Sudden double vision, major one-sided loss of sight, severe eye pain or new flashes are not typical stable astigmatism. Arrange emergency assessment and call 103 for acute neurological or severe visual symptoms.
Frequently asked questions
Can children have astigmatism?
Yes. It can be present early and may influence visual development, so appropriate examination and correction matter.
Are ordinary glasses sufficient?
A tailored prescription may require cylindrical correction; the choice depends on the degree of astigmatism and visual needs.
Is sudden double vision explained by astigmatism?
Not automatically. A new sudden change needs a separate assessment, particularly if accompanied by weakness, pain or vision loss.
Information sources
Medical source links used when preparing this article.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
