Scleral Lenses for Keratoconus: Restoring Clear Vision When Traditional Contacts Fail

Keratoconus changes the shape of the cornea, causing it to become thinner and develop a cone-like curve. Because the cornea is no longer evenly rounded, light cannot focus properly inside the eye. This can lead to blurred or distorted vision, glare, light sensitivity, and frequent prescription changes.

Glasses or standard soft contact lenses may help during the early stages. As the condition progresses, however, traditional vision correction may no longer provide stable clarity. Scleral lenses offer a customized option for people with keratoconus who continue to struggle with their vision.

Why Traditional Contacts May Stop Working

Standard soft contact lenses follow the shape of the cornea. When keratoconus creates an irregular surface, the lens may also become uneven, allowing visual distortion to remain. The lens may shift, feel uncomfortable, or provide vision that changes throughout the day.

Small rigid gas-permeable lenses can create a smoother optical surface, but they sit directly on the cornea. Some patients find them difficult to tolerate, especially when the cornea is highly irregular or sensitive. Scleral lenses are designed differently, which can improve both stability and comfort.

How Scleral Lenses Improve Keratoconus Vision

A scleral lens is a larger gas-permeable lens that rests on the sclera, which is the white part of the eye. Instead of touching the uneven cornea, it vaults over it. The space beneath the lens is filled with sterile saline before insertion, creating a smooth optical surface over the cornea.

This design can help neutralize irregularities that glasses and traditional contacts cannot fully correct. Because the lens is supported by the sclera, it may also remain more stable during blinking and everyday activities.

Patients may experience benefits such as:
 

• Sharper and more consistent vision

• Less glare, ghosting, and visual distortion

• Improved comfort compared with smaller rigid lenses

• Greater lens stability throughout the day

• A fluid reservoir that helps protect and hydrate the corneal surface

Why a Custom Scleral Lens Fitting Matters

Scleral lenses are not one-size-fits-all contacts. Each lens must be selected and adjusted according to the shape of the eye, the amount of corneal irregularity, and the patient’s visual needs. A comprehensive eye exam and detailed corneal measurements help guide the fitting process.

Trial lenses allow the eye doctor to evaluate how the lens settles, whether it clears the cornea properly, and how well it aligns with the sclera. The prescription can then be refined to improve clarity. Follow-up visits are also important because keratoconus can change over time, and the lens may require future adjustments.

Knowing When to Consider Scleral Lenses

A scleral lens evaluation may be appropriate when glasses no longer sharpen vision, soft contacts move or blur, or smaller rigid lenses feel uncomfortable. Patients who notice increasing glare, double images in one eye, difficulty driving at night, or repeated prescription changes should also have their corneal health evaluated.

Scleral lenses do not stop keratoconus from progressing, but they can provide advanced vision correction while the condition is monitored and managed. Patients with signs of progression may need additional care to help protect the cornea.

Schedule a customized scleral lens evaluation with 20/20 EyeVenue in Westminster and Strasburg, Colorado, by calling (720) 740-0400.