Astigmatism is a common refractive error that affects how light enters the eye, often leading to blurred or distorted vision. For many individuals, standard spherical contact lenses aren’t enough to provide clear and stable vision correction.
Astigmatism occurs when the cornea (the clear front surface of the eye) or the lens inside the eye has an irregular shape. Instead of being round like a basketball, an eye with astigmatism is more oval-shaped. This irregular curvature causes light to focus on multiple points in the eye rather than a single focal point on the retina, resulting in blurred or distorted vision at all distances.
Common symptoms of astigmatism include:
Blurry or fuzzy vision
Eye strain or discomfort
Headaches
Difficulty seeing at night
Standard soft contact lenses are spherical and designed to correct nearsightedness or farsightedness by evenly focusing light on the retina. However, they do not address the uneven curvature found in astigmatism. As a result, individuals with moderate to high astigmatism who wear spherical lenses may still experience blurry or fluctuating vision, especially when their lenses rotate on the eye.
Toric contact lenses are specially crafted to correct the asymmetrical shape of the eye caused by astigmatism. Unlike standard lenses, toric lenses have different powers in different meridians of the lens to compensate for the uneven curvature of the cornea or lens. They also have a unique design that keeps the lens stable on the eye, preventing rotation that could blur vision.
Toric lenses are engineered with specific features to correct astigmatism:
Multiple curvatures: The lens has varying powers along different axes to correct the differing refractive errors.
Stabilization mechanisms: Designs such as prism ballast or thin zones help keep the lens in the correct orientation so that the correction remains accurate.
Orientation markings: These help eye care providers ensure the lens fits correctly and remains properly aligned.
When properly fitted, toric lenses remain in position and provide consistent, clear vision.
Improved visual clarity: Designed specifically for astigmatism, they provide sharper and more stable vision than standard lenses.
Comfort: Available in both soft and rigid gas-permeable materials for all-day comfort.
Customization: Wide variety of brands, materials, and wearing schedules (daily, bi-weekly, monthly) tailored to your lifestyle and prescription.
Freedom from glasses: Enjoy clear vision without relying solely on eyeglasses.
If you have astigmatism and have struggled with the clarity or comfort of standard contact lenses, toric lenses may be the solution you need. With proper fitting and guidance from your eye care provider, these specialized lenses can significantly improve your visual experience.
If you have astigmatism and are interested in exploring toric contact lenses, schedule a contact lens exam at Complete Eyecare to find the perfect fit. Visit our office in Blaine, Minnesota, or call (763) 220-2602 to book an appointment today.