Scleral lenses are larger than traditional contacts, resting on the white part of the eye (the sclera) rather than the cornea. This unique design provides unparalleled comfort and vision improvement for those with keratoconus. Unlike rigid gas permeable lenses that can cause irritation, scleral lenses create a smooth, uniform surface that eliminates distortion and provides crystal-clear sight.
At the Khanna Vision Institute, we’ve witnessed firsthand the life-changing impact of scleral lenses. Our patients report a significant reduction in eye strain, light sensitivity, and the need to constantly adjust their lenses. The increased comfort and visual acuity have allowed them to reclaim their quality of life, whether it’s driving, reading, or simply enjoying everyday activities.
Scleral Lenses
Purpose: Scleral lenses are designed to vault over the cornea and rest on the sclera (the white part of the eye). They are particularly beneficial for patients with keratoconus because they create a new, smooth optical surface and can correct severe corneal irregularities.
Structure:
Size and Shape: Scleral lenses are larger in diameter than conventional contact lenses, ranging from 14.5 mm to 24 mm. This large size allows the lens to vault over the cornea and rest on the sclera.
Material: Made from rigid, gas permeable materials that allow oxygen to reach the cornea, which is essential for corneal health.
How it works:
Vaulting the Cornea: Scleral lenses create a tear-filled reservoir between the back surface of the lens and the front surface of the cornea. This reservoir compensates for the corneal irregularities, providing a smooth refractive surface and improving vision.
Stability: The large size and scleral placement offer superior stability compared to smaller lenses, reducing the risk of lens displacement and providing consistent vision correction.
Advantages:
Improved Comfort: Scleral lenses are generally more comfortable than smaller RGP lenses because they do not touch the sensitive corneal surface. The lens rests on the less sensitive sclera, which can make wearing them more comfortable, especially for patients with advanced keratoconus.
Enhanced Visual Acuity: By creating a new, smooth optical surface, scleral lenses can significantly improve visual acuity, even in cases of severe keratoconus.
Hydration: The tear-filled reservoir keeps the cornea hydrated, which can be beneficial for patients with dry eye syndrome, a condition that often accompanies keratoconus.
Custom Fit: Scleral lenses are custom-made to fit the specific contours of the patient’s eye, ensuring a good fit and optimal vision correction.
Limitations:
Fitting Complexity: The fitting process for scleral lenses can be complex and time-consuming, often requiring multiple visits to an eye care professional to achieve the perfect fit.
Cost: Scleral lenses can be more expensive than other types of contact lenses due to their custom design and the materials used.
Care and Maintenance: Proper cleaning and care are essential to prevent infections and ensure the longevity of the lenses. They require specific cleaning solutions and careful handling.
Usage and Care:
Fitting: The fitting process involves a detailed examination and mapping of the cornea and sclera using tools like corneal topography or optical coherence tomography (OCT). An eye care professional will design the lenses to match the individual contours of the eye.
Insertion and Removal: Scleral lenses can be more challenging to insert and remove compared to smaller lenses. Patients often need to use a plunger-like device for these tasks.
Cleaning: Daily cleaning with prescribed solutions is crucial to remove deposits and prevent infections. The lenses should be stored in a clean, disinfected case when not in use.
Regular Follow-Ups: Regular check-ups with an eye care professional are necessary to monitor the fit and function of the lenses and make any needed adjustments.
Don’t settle for the discomfort and limitations of traditional contact lenses. Discover the revolutionary power of scleral lenses and take control of your keratoconus. Contact the Khanna Vision Institute today and experience the difference for yourself.