Keratoconus is an eye condition that causes the cornea — the clear front surface of the eye — to gradually thin and bulge into a cone-like shape. This can make vision blurry, distorted, or difficult to correct with standard glasses and contact lenses. For many patients, specialty contact lenses, including scleral lenses, can provide clearer and more comfortable vision.
Scleral lenses are large, gas-permeable contact lenses that vault over the cornea and rest on the white part of the eye, called the sclera. Their design makes them a common option for managing the visual effects of keratoconus.
How do scleral lenses improve vision with keratoconus?
An irregular cornea can scatter light as it enters the eye, causing blurry vision, glare, halos, ghost images, and reduced night vision. Because standard soft contacts conform to the cornea’s uneven surface, they may not correct these symptoms effectively.
Scleral lenses create a smooth optical surface in front of the cornea. The space between the lens and the eye is filled with preservative-free saline, which helps mask corneal irregularities and may improve visual clarity.
Scleral lenses may reduce:
- Blurry or distorted vision
- Glare, halos, and ghosting around lights
- Fluctuating vision during the day
- Discomfort related to an irregular corneal surface
Results vary by patient, but scleral lenses can offer more stable vision for people who have not found success with glasses or conventional contacts.
Why can scleral lenses feel more comfortable?
Unlike many contact lenses, scleral lenses do not sit directly on the cornea. Instead, they vault over it and rest on the sclera, an area that is generally less sensitive.
The fluid reservoir beneath the lens keeps the cornea bathed in saline while the lens is worn. This can be beneficial for patients who experience dryness or discomfort with other contact lens types.
A precise fit matters. Poorly fitted lenses can lead to irritation, redness, or reduced vision, so scleral lenses should be fitted and monitored by an eye doctor experienced in specialty contact lenses.
What happens during a scleral lens fitting?
A scleral lens fitting is more detailed than a standard contact lens appointment. Your eye doctor will evaluate your corneal shape, vision needs, eye health, and how the lens fits on your eye.
The fitting process may include:
- Measuring the shape and curvature of your cornea
- Testing diagnostic lenses to assess fit and vision
- Adjusting lens design based on your needs
- Learning how to insert, remove, clean, and fill the lenses
- Scheduling follow-up visits to confirm the fit remains healthy and effective
It may take more than one visit to finalize the fit. That individualized approach helps ensure the lenses provide the clearest, most comfortable vision possible.
Are scleral lenses right for your keratoconus?
Scleral lenses can be an excellent option, but treatment recommendations depend on the stage of keratoconus and your individual vision needs. Some patients may benefit from glasses, other specialty lens designs, or additional care.
A comprehensive eye exam can help evaluate changes in your vision and determine whether scleral lenses may be right for you. Mention if your vision is becoming more distorted, your contacts are less comfortable, or night driving has become more difficult.
Explore specialty contact lens options
Keratoconus can make everyday vision frustrating, but you do not have to settle for blurry or uncomfortable sight. Scleral lenses may provide a stable, customized solution for clearer vision and improved comfort. Schedule an eye exam to discuss your options.
