Can I Wear Contact Lenses with Astigmatism? And What’s the Fitting Process?
For many people, astigmatism is simply a part of their vision – a common imperfection in the curvature of the cornea or lens that causes blurred vision at all distances. If you have astigmatism and are considering contact lenses, you’re in good company. Modern contact lens technology has made comfortable, effective vision correction available for the vast majority of astigmatism cases. But navigating the options and fitting process can feel overwhelming. This article will break down what you need to know, including how we approach fitting contact lenses for astigmatism.
Understanding Astigmatism & Contact Lens Options
Astigmatism occurs when the cornea (the clear front surface of your eye) isn’t perfectly spherical, like a baseball. Instead, it’s shaped more like a football. This irregular shape causes light to focus at multiple points, leading to blurry or distorted vision. Traditionally, glasses with cylinder correction in the prescription address this. But contact lenses can offer a more natural field of vision and greater freedom.
There are several types of contact lenses designed to correct astigmatism:
- Toric Contact Lenses: These are the most common type of contact lens for astigmatism. They have a unique design that aligns with the curvature of your cornea, stabilizing the lens and providing clear vision. Toric lenses are available in both soft and rigid gas permeable (RGP) materials.
- Rigid Gas Permeable (RGP) Lenses: Also known as GP lenses, these are more durable and often provide sharper vision than soft toric lenses, particularly for higher degrees of astigmatism or irregular corneal shapes. They take a bit longer to get used to initially but can be a great long-term solution.
- Hybrid Contact Lenses: These lenses combine the benefits of both RGP and soft lenses. They have a rigid gas permeable center for crisp vision and a soft skirt for comfort.
The "best" lens depends on the degree and type of your astigmatism, your tear film production, your lifestyle, and your personal preferences. There’s no one-size-fits-all answer.
The Contact Lens Fitting Process for Astigmatism: A Detailed Look
A successful contact lens fitting is about more than just matching a prescription. It's a comprehensive process that ensures the lenses fit your eyes comfortably, provide clear vision, and don’t compromise your eye health. Here's a breakdown of what you can expect:
- Comprehensive Eye Exam: This is the foundation. We'll start with a thorough eye exam to determine your current prescription, assess the health of your eyes, and map the surface of your cornea. This includes measuring the curvature of your cornea (keratometry) and identifying any irregularities.
- Astigmatism Assessment: Beyond standard measurements, we'll perform additional tests specifically to characterize your astigmatism. This helps us determine the axis and degree of correction needed for the most accurate lens design. We use advanced corneal topography which creates a detailed “map” of your cornea's surface.
- Lens Selection & Trial Lenses: Based on the assessment, we'll recommend several different lens types (toric, RGP, hybrid) and brands that are likely to work well for your eyes. We’ll then provide you with trial lenses – these are diagnostic lenses, not your final prescription.
- Initial Fitting & Evaluation: You'll wear the trial lenses for a short period (usually an hour or two) in the office, allowing us to observe how the lenses center on your eyes and assess initial comfort. We'll evaluate lens movement, alignment, and overall fit.
- Take-Home Trial & Follow-Up: You’ll take the trial lenses home to wear for a week or two. This is a critical step. Real-world wear helps us understand how the lenses perform with your daily activities, tear film, and blinking patterns. We’ll provide you with a detailed questionnaire to complete, noting any issues like redness, discomfort, fluctuating vision, or dryness.
- Follow-Up Appointments & Refinement: You'll return for one or more follow-up appointments. We'll assess how you've been wearing the lenses, evaluate your vision with the lenses in place, and refine the prescription and lens parameters as needed. This may involve trying different base curves, diameters, or toric powers until we achieve the optimal fit and vision.
- Lens Care Training: Once we’ve finalized your prescription, we'll provide thorough instructions on proper lens care, including cleaning, disinfection, and storage. This is vital for maintaining eye health and preventing infections.
The entire fitting process typically takes 2-4 weeks to complete. It requires patience and open communication between you and the optometrist. Don't hesitate to voice any concerns or discomfort you experience during the trial period.
Comfort & Vision: What to Expect
With the right contact lens and proper fitting, you should experience clear, stable vision and all-day comfort. However, it's important to be realistic.
- Adaptation Period: It may take a few days to adjust to wearing contact lenses, especially if you've never worn them before. You might experience mild initial discomfort or slight blurriness.
- Dry Eye: Dry eye is a common concern for contact lens wearers. We’ll discuss strategies for managing dry eye, such as using lubricating eye drops.
- Lens Awareness: Some individuals may experience a slight awareness of the lenses in their eyes, particularly with RGP lenses. This usually diminishes over time.
If you experience persistent discomfort, redness, pain, or blurred vision, remove the lenses immediately and contact us. It's crucial to address any issues promptly to prevent potential complications.
While we strive for a perfect fit every time, occasional adjustments may be necessary over time as your eyes change. Regular check-ups are essential for maintaining optimal vision and eye health.
Looking for the right lenses? Book an Appointment today to discuss your options.