Keratoconus Treatment Options: From Glasses to Scleral Lenses

Keratoconus is a progressive corneal condition in which the normally round cornea thins and begins to bulge outward into a cone shape. This irregular curvature distorts the way light enters the eye, causing blurred and distorted vision that glasses and standard contact lenses often cannot adequately correct.

It typically begins in the teenage years or early twenties and progresses through the twenties and thirties before stabilizing. Early diagnosis and appropriate management can preserve vision and quality of life through every stage.

Keratoconus is progressive — early diagnosis and corneal cross-linking can halt progression before vision is severely affected. The earlier it is caught, the more treatment options remain available.

The cornea is the clear, dome-shaped front surface of the eye. In a healthy eye, it is uniformly curved, bending light evenly onto the retina. In keratoconus, the structural integrity of the corneal tissue is compromised — the collagen fibers that give the cornea its shape weaken, allowing the central or inferior cornea to thin and protrude.

The resulting irregular astigmatism produces visual distortion that is qualitatively different from regular astigmatism. Patients describe ghosting, halos, streaking around lights, and a general inability to achieve sharp vision even with glasses.

Keratoconus is typically staged by severity:

Mild: Subtle corneal thinning and irregular astigmatism. Glasses may still provide acceptable vision. Corneal topography shows early irregularity.

Moderate: More pronounced thinning and protrusion. Glasses are increasingly inadequate. Rigid contact lenses are typically required for functional vision.

Advanced: Significant thinning, protrusion, and scarring. Rigid or scleral lenses are required. Corneal transplant may be considered if scarring is severe.

In the earliest stages of keratoconus, glasses can provide adequate vision correction. As the condition progresses and irregular astigmatism increases, glasses become less effective — the irregular corneal surface cannot be corrected by a sphero-cylindrical lens prescription.

Standard soft contact lenses conform to the shape of the cornea and do not correct irregular astigmatism. Toric soft lenses (for regular astigmatism) are similarly ineffective for keratoconus. Soft lenses are generally not appropriate beyond the mildest stages.

RGP lenses are the traditional treatment for moderate keratoconus. Because they are rigid, they vault over the irregular corneal surface and create a smooth, regular refracting surface. The tear film fills the space between the lens and the cornea, neutralizing the irregular astigmatism.

RGP lenses can be challenging to fit and may be uncomfortable, particularly in the early adaptation period. They require careful fitting and regular follow-up.

Scleral lenses are large-diameter rigid lenses that vault entirely over the cornea and rest on the white of the eye (the sclera). They are filled with saline solution before insertion, creating a fluid reservoir that completely neutralizes corneal irregularity.

Scleral lenses offer several advantages over standard RGP lenses for keratoconus:

• Superior comfort: The lens does not contact the sensitive corneal surface
• Better centration: The large diameter provides stable positioning
• Effective for advanced cases: Can vault over significant protrusion
• Suitable for dry eye patients: The fluid reservoir provides continuous hydration

Scleral lens fitting is a specialized skill that requires precise measurements and iterative fitting. Dr. Payne has extensive experience fitting scleral lenses for keratoconus patients.

Hybrid lenses have a rigid center and a soft skirt. They combine the optical quality of an RGP lens with the comfort of a soft lens. They are a good option for patients who cannot tolerate standard RGP lenses.

Cross-linking is the only treatment that can halt the progression of keratoconus. It uses riboflavin (vitamin B2) eye drops combined with ultraviolet-A light to strengthen the collagen bonds in the corneal stroma, stabilizing the cornea and preventing further thinning and protrusion.

Cross-linking does not reverse existing damage — it stops progression. It is most effective when performed in the earlier stages of the disease. Cross-linking is performed by corneal surgeons; we can provide a referral if appropriate.

Small plastic ring segments (Intacs) are surgically implanted in the corneal stroma to flatten and regularize the corneal surface. ICRS can improve visual acuity and contact lens tolerance in moderate keratoconus. They are typically combined with cross-linking.

In advanced keratoconus with significant scarring or intolerance to contact lenses, corneal transplant (penetrating keratoplasty or deep anterior lamellar keratoplasty) may be necessary. Modern surgical techniques have significantly improved outcomes, but transplant is reserved for cases where other options have failed.

Keratoconus requires regular monitoring with corneal topography to track progression. The frequency of follow-up depends on the stage and rate of progression — typically every 6–12 months for stable cases, more frequently for progressive disease.

Is keratoconus hereditary? Yes. Keratoconus has a genetic component — first-degree relatives of keratoconus patients have a significantly higher risk. Eye rubbing is also a significant risk factor and should be avoided.

Can keratoconus be cured? Keratoconus cannot be cured, but it can be effectively managed. Cross-linking can halt progression. Scleral lenses can restore functional vision even in advanced cases.

Does insurance cover keratoconus treatment? Scleral lens fitting and contact lenses for keratoconus are typically covered under medical insurance (not vision insurance) as treatment for a diagnosed medical condition. Cross-linking and surgical procedures are covered under medical insurance. Call us to discuss your specific plan.

Trendsetter Eyewear is located at 1225 S Fort Apache Rd #145, Summerlin, Las Vegas. Dr. Cynthia Payne has extensive experience diagnosing and managing keratoconus, including scleral lens fitting.

Contact us online or call (702) 479-5222 to schedule your evaluation.

Related reading:

• Comprehensive eye exams at Trendsetter — including corneal topography
• Contact lens exam in Summerlin — how a contact lens fitting works
• OCT eye scan: what to expect — advanced imaging for corneal conditions