Understanding Astigmatism.

Astigmatism is a common refractive error caused by an irregularly shaped cornea or lens. Instead of being round like a basketball, the cornea is curved more like a football, causing light to focus on multiple points rather than one. This results in blurry or distorted vision at all distances — unlike nearsightedness or farsightedness, which affect only certain distances.

Astigmatism is usually present from birth and is caused by the natural shape of the eye. Genetics play the largest role, but it can also develop after eye injuries, certain eye surgeries, or corneal conditions like keratoconus. It is not caused by reading in dim light or sitting too close to a screen.

Yes, astigmatism can change gradually over time — though it often stabilizes by early adulthood. Significant shifts may occur after eye surgery, injury, or with progressive corneal conditions like keratoconus. Regular eye exams at Soni Vision Institute help monitor any changes and keep your prescription current.

No. Nearsightedness (myopia) occurs when the eye is too long, making distant objects blurry. Astigmatism is caused by an irregularly shaped cornea or lens, producing blurry or distorted vision at all distances. Many people have both conditions at once, and both can be corrected with glasses, contacts, or surgery.

Astigmatism is diagnosed during a comprehensive eye exam. Your ophthalmologist uses corneal topography to map the curvature of your cornea and a refraction test to measure how light bends as it enters the eye. These tests determine the type and degree of astigmatism and guide treatment recommendations.

Yes, astigmatism is very common in children and is often present from birth. Many children do not realize their vision is blurry because they have never known anything different. Uncorrected astigmatism in young children can contribute to amblyopia (lazy eye), so early detection through pediatric eye exams is important.

Not always. Very mild astigmatism may not cause noticeable symptoms and may not require correction. However, if you experience eye strain, headaches, squinting, or blurry vision — even occasionally — corrective lenses or a surgical consultation can make a meaningful difference in your daily comfort.

Yes. Uncorrected or under-corrected astigmatism forces your eye muscles to work harder to focus, which can lead to eye strain and tension headaches — particularly after prolonged reading, screen time, or driving. Correcting the astigmatism with glasses, contacts, or surgery typically resolves these symptoms.

Yes. Modern custom LASIK is highly effective at correcting astigmatism by reshaping the cornea into a more symmetrical curvature. At Soni Vision Institute, our surgeons use wavefront-guided bladeless LASIK to precisely treat corneal astigmatism. Most patients achieve 20/20 vision or better.

Absolutely. Toric lenses are specifically designed to correct astigmatism at the time of cataract surgery. At Soni Vision Institute, we routinely implant toric lenses to address both the cataract and astigmatism in a single procedure — reducing or eliminating the need for glasses afterward.

A toric lens is an advanced technology intraocular lens implanted during cataract surgery that corrects astigmatism in addition to replacing the clouded natural lens. The lens is precisely aligned to the axis of your astigmatism, providing sharper distance vision and reducing dependence on glasses after surgery.

Yes. PRK is a flapless laser procedure that reshapes the corneal surface to correct astigmatism — it is especially well suited for patients with thinner corneas who may not qualify for LASIK. EVO ICL is an implantable lens option that corrects astigmatism without removing any corneal tissue, making it ideal for higher prescriptions. Your surgeon at Soni Vision Institute will recommend the best approach based on your eye anatomy and lifestyle.

Yes. Toric contact lenses are specifically designed to correct astigmatism. They have different focusing powers in different meridians of the lens and are weighted to stay properly aligned on the eye. Both soft and rigid gas-permeable toric contacts are available depending on your prescription and comfort preference.

If left uncorrected, pre-existing astigmatism can reduce the clarity of your vision after cataract surgery. That is why addressing astigmatism during the procedure — with a toric lens or laser-assisted incisions — is so important. At Soni Vision Institute, we measure and plan for astigmatism correction as part of every cataract surgery evaluation.

Standard vision insurance typically covers glasses and contact lenses for astigmatism. When astigmatism is corrected as part of medically necessary cataract surgery, the surgery itself is usually covered by medical insurance, though the upgrade to a toric lens may involve an additional out-of-pocket cost. Elective procedures like LASIK are generally not covered. Our team can help you understand your specific benefits.