Keratoconus
- Corneal Procedures & Keratoconus Overview — the full spectrum of corneal care at Belmont Eye Center
- Dry Eye & Blepharitis Treatment — ocular surface conditions that commonly accompany keratoconus and must be managed prior to any corneal procedure
- Cataract Surgery — for keratoconus patients who later develop lens clouding affecting their vision
- Glaucoma Treatment — elevated eye pressure monitoring is particularly relevant for patients using corticosteroid drops post-cross-linking
- LASIK Eye Surgery — for patients with post-cross-linking stable corneas who may qualify for refractive correction
- <a href=”https://
What Is Keratoconus?
Keratoconus is a progressive eye condition in which the cornea — the clear, dome-shaped surface of the eye — gradually thins and bulges outward into a cone-like shape. This distortion causes significant blurring, light sensitivity, and visual distortion that worsens over time if left untreated. At Belmont Eye Center, Dr. Sandra Belmont specializes in diagnosing and treating keratoconus using the most advanced techniques available in New York City.
New York City Keratoconus Specialist Sandra Belmont, M.D.
Dr. Sandra Belmont is a board-certified ophthalmologist and fellowship-trained corneal surgeon with decades of experience treating complex corneal conditions including keratoconus. As the director of her own Corneal Fellowship Program for over twenty years, she has trained many of New York’s leading eye surgeons. Patients from across the country — and around the world — travel to Belmont Eye Center’s Park Avenue location to benefit from her expertise. Read what patients have to say on our patient reviews page, or watch celebrity video testimonials from Dr. Belmont’s most recognizable patients.
How Keratoconus Affects Your Vision
A healthy cornea is evenly curved, helping to focus light precisely onto the retina. In eyes with keratoconus, the structural collagen fibers that hold the cornea in its rounded shape weaken over time. As the cornea thins and protrudes forward, light entering the eye becomes irregularly refracted, causing distorted and blurred vision that standard eyeglasses often cannot fully correct. Keratoconus typically begins in the late teens to early twenties and progresses over one to two decades, though the rate of progression varies widely from patient to patient. Because keratoconus is a corneal condition, it requires evaluation by a corneal specialist — not a general optometrist.
Corneal Cross-Linking: Halting Progression
Corneal cross-linking (CXL) is the only FDA-approved procedure proven to slow or halt the progression of keratoconus. The procedure works by strengthening the collagen bonds within the corneal tissue, stabilizing the cornea’s shape before further thinning occurs. During cross-linking, Dr. Belmont applies specialized riboflavin (vitamin B2) eye drops to the cornea, which is then activated by a carefully calibrated ultraviolet-A light for approximately 30 minutes. The riboflavin absorbs the UV light energy and creates new collagen cross-links that structurally reinforce the cornea. Most patients notice gradual visual stabilization in the months following the procedure, and many experience a modest improvement in corneal curvature over time. Corneal cross-linking is performed on an outpatient basis at our New York City office and is most effective when keratoconus is detected and treated early.
Your Keratoconus Treatment Options
Treatment for keratoconus depends on the stage of the disease. In early keratoconus, updated eyeglass prescriptions or soft contact lenses may temporarily improve vision. As the condition progresses, specialty contact lenses become the preferred visual correction solution.
Rigid gas-permeable (RGP) contact lenses vault over the irregular corneal surface and create a smooth refracting surface, dramatically improving vision in moderate to advanced keratoconus. Scleral lenses, which rest on the white part of the eye and arch completely over the cornea, are often the most comfortable and effective option for patients with significant corneal irregularity.
For patients whose keratoconus continues to progress despite other interventions, or for those who can no longer tolerate contact lenses, corneal transplant surgery (penetrating keratoplasty or DALK) may be recommended to restore functional vision. Because keratoconus directly affects the corneal surface, some patients with mild, stable disease may later be evaluated for procedures like LASIK or No-Cut LASIK/PRK to refine vision — though this is only considered once the cornea has been fully stabilized and verified to meet LASIK eligibility criteria.
Which Treatment Is Right For Me?
The best treatment plan depends on the severity of your keratoconus, the rate of progression, your corneal thickness, and your lifestyle. Dr. Belmont performs comprehensive corneal mapping and topography to precisely assess your corneal shape and recommend the most appropriate course of treatment. To discuss your options, schedule a consultation at Belmont Eye Center.
When Should I Seek Treatment for Keratoconus?
Keratoconus can be challenging to recognize in its earliest stages, as vision changes may be subtle and easily attributed to a routine need for updated glasses. However, it is critical to seek evaluation promptly if you notice any of the warning signs below. Early diagnosis and intervention — particularly corneal cross-linking — can preserve much of your natural corneal tissue and visual function before irreversible changes occur. If you have been experiencing any of the following symptoms, contact Belmont Eye Center to arrange an examination with Dr. Belmont.
One of the earliest and most common signs of keratoconus is blurring or distortion that cannot be fully corrected with standard eyeglasses. As the cornea loses its smooth, round shape, it bends light inconsistently, creating smearing, streaking, or ghost images. If your glasses are no longer bringing your vision to its former clarity, schedule an evaluation with Dr. Belmont promptly. This type of distortion is distinct from blurring caused by cataracts and requires corneal topography to properly diagnose.
Keratoconus causes the corneal surface to scatter incoming light rather than focus it cleanly, manifesting as extreme sensitivity to bright lights, sunlight, and oncoming headlights. If you find yourself squinting frequently or avoiding bright environments, this may be a sign of corneal irregularity. Dry eye can also contribute to light sensitivity and frequently coexists with keratoconus — Dr. Belmont evaluates both conditions during your examination at our NYC office.
If you need new glasses every few months — and each new prescription still fails to fully sharpen your vision — this pattern of rapid progressive change can indicate keratoconus. Unlike typical refractive errors corrected by LASIK or PRK, prescription instability in keratoconus reflects a structural change in the cornea itself. This is why LASIK eligibility screening always includes corneal topography — to rule out underlying keratoconus before any refractive procedure is performed.
Patients with keratoconus frequently report seeing halos, starburst patterns, or ghost images around light sources — particularly at night. This is caused by the irregular corneal surface diffracting light in multiple directions. These symptoms are distinct from halos caused by cataracts or glaucoma, and an expert examination is required to identify the true source. Contact our office if you are experiencing these visual disturbances.
Chronic eye rubbing is one of the most significant modifiable risk factors for keratoconus onset and progression. Rubbing mechanically stresses corneal collagen fibers, accelerating the structural breakdown that drives the condition forward. Patients with allergic eye disease or chronic irritation are especially prone to habitual rubbing. If you experience persistent irritation, our dry eye and blepharitis treatment team can help address the underlying cause. Stopping eye rubbing entirely is one of the most important steps a keratoconus patient can take — ask Dr. Belmont about management strategies at your consultation.
Difficulty driving or navigating at night — particularly when faced with oncoming headlights or low-contrast environments — is a hallmark complaint of keratoconus patients. The irregular corneal surface scatters light most severely under low-light conditions when the pupil is dilated. This symptom often drives patients to seek care and can significantly impact safety. Schedule an appointment with Dr. Belmont to determine whether keratoconus is affecting your night vision. You can also read patient reviews from others who came to us with similar complaints.
Keratoconus Treatment Recovery
Recovery from corneal cross-linking is generally straightforward, though patients should plan for a few days of rest. Immediately following the procedure, the eyes may feel sensitive, sore, or irritated — similar to the sensation of a mild sunburn. Vision may temporarily decrease before gradually improving over several weeks to months as the corneal tissue heals and strengthens.
A soft bandage contact lens is placed on the eye after cross-linking and worn for approximately five days while the corneal surface heals. Antibiotic and anti-inflammatory eye drops are prescribed to protect against infection and manage discomfort during recovery. Most patients are able to return to work and normal daily activities within one to two weeks — a recovery timeline similar in many respects to that of No-Cut LASIK/PRK.
Dr. Belmont monitors each patient closely throughout the recovery period with scheduled follow-up appointments to track corneal healing and confirm that progression has stabilized. For questions about what to expect, visit our news and blog or contact our office directly.
What Causes Keratoconus?
The exact cause of keratoconus is not fully understood, but research points to a combination of genetic, environmental, and biochemical factors that weaken the structural integrity of the corneal collagen. Known contributing factors include:
- Genetic predisposition — keratoconus tends to run in families, and first-degree relatives of affected individuals should be screened regularly by a corneal specialist
- Chronic, vigorous eye rubbing — one of the most significant modifiable risk factors; patients diagnosed with keratoconus must stop rubbing their eyes entirely to slow disease progression
- Poorly fitted contact lenses that create repeated mechanical stress on the cornea over time
- Associated systemic conditions including Down syndrome, Ehlers-Danlos syndrome, Marfan syndrome, and osteogenesis imperfecta
- Allergic eye disease and atopic conditions — managing these aggressively can reduce irritation-driven rubbing; our dry eye and blepharitis team treats ocular surface disease that frequently accompanies keratoconus
- Overexposure to ultraviolet (UV) radiation without adequate protective eyewear
Who Is At Risk For Keratoconus?
Keratoconus most commonly develops in individuals between the ages of 10 and 25, though it can present at any age. Those with a family history of the condition are at significantly elevated risk and should have corneal topography screenings beginning in adolescence. Individuals with a history of atopic diseases — including asthma, eczema, and hay fever — are also more likely to develop keratoconus, largely due to the associated habit of eye rubbing. Patients who have trusted Dr. Belmont with their corneal care come from across New York City and beyond — including many referred by other physicians, earning her the reputation as “the Doctors’ Doctor.” You can also view celebrity reviews to learn why the most discerning patients choose Belmont Eye Center.
Can Keratoconus Be Prevented?
While keratoconus cannot be entirely prevented in genetically predisposed individuals, several lifestyle habits can meaningfully reduce risk or slow progression. The single most important preventive behavior is to stop rubbing your eyes — even gently. Habitual eye rubbing physically distorts and weakens corneal collagen over time.
Managing allergies aggressively can reduce the urge to rub. If chronic ocular surface irritation is contributing to rubbing, treatment for dry eye or blepharitis may be an important first step. Wearing UV-protective sunglasses outdoors limits cumulative environmental damage to the cornea. Regular comprehensive eye exams — including corneal topography — are the best way to detect early keratoconus before significant structural changes have occurred. If you are over 18 and wondering whether you might qualify for vision correction procedures, our LASIK self-test is a useful starting point.
Candidates For Corneal Cross-Linking
You may be a candidate for corneal cross-linking if you have been diagnosed with progressive keratoconus and your cornea retains adequate thickness for the procedure to be safely performed. To qualify, patients should generally:
- Have documented evidence of keratoconus progression — either worsening corneal topography maps or a changing refraction over time
- Have sufficient corneal thickness (typically at least 400 microns) to safely undergo the procedure
- Not have any active ocular infections or severe ocular surface disease; conditions such as dry eye should be treated and stabilized beforehand
- Not be pregnant or nursing, as hormonal changes can affect corneal stability
Cross-linking is most effective when performed early. Patients who delay treatment risk greater visual loss and may ultimately require a corneal transplant. If you have been told you have an irregular cornea or a steep corneal curvature, or have experienced rapidly changing eyeglass prescriptions, a prompt consultation is strongly advised. Those who have previously been deemed ineligible for LASIK due to corneal irregularities should ask Dr. Belmont whether keratoconus may be the underlying cause. Learn more about procedure costs and financing options at Belmont Eye Center.
Frequently Asked Questions About Keratoconus
Will corneal cross-linking restore my vision?
Cross-linking is primarily a stabilization procedure — its goal is to halt disease progression, not to reverse corneal shape changes that have already occurred. Some patients experience a modest improvement in corneal curvature and visual acuity following cross-linking. After the cornea has been fully stabilized, vision correction options may be explored. In carefully selected patients with mild, stable keratoconus, procedures such as LASIK, No-Cut LASIK/PRK, or LASIK for reading vision may be discussed to further optimize your outcome. Dr. Belmont will guide you through every available option based on your individual corneal health.
Can I wear contact lenses if I have keratoconus?
Yes. Specialty contact lenses are among the most effective visual aids for keratoconus patients. Rigid gas-permeable lenses, hybrid lenses, and scleral lenses are all options that Dr. Belmont’s team can fit and optimize for your corneal shape. The fitting process for keratoconus contact lenses is more involved than standard fitting and requires a specialist experienced in complex corneal cases.
Does keratoconus affect both eyes?
Keratoconus is bilateral in the majority of cases — meaning it affects both eyes — though the severity and rate of progression often differ between eyes. It is important to have both eyes evaluated and monitored regularly, even if vision appears better in one eye. Contact Belmont Eye Center to schedule a bilateral corneal evaluation with Dr. Sandra Belmont.
How is keratoconus different from nearsightedness or astigmatism?
Unlike common refractive errors such as nearsightedness, farsightedness, or astigmatism — which can typically be corrected with glasses, contacts, LASIK, or PRK — keratoconus is a structural disease of the cornea that requires disease-specific management. Standard LASIK eligibility criteria typically exclude patients with active keratoconus. Patients who have been told they are not LASIK candidates due to thin or irregular corneas should seek evaluation for keratoconus with a corneal specialist. When choosing any eye surgeon, review our guidance on how to choose a LASIK surgeon — the same principles apply to selecting a keratoconus specialist.
How much does keratoconus treatment cost?
The cost of treatment depends on the type of intervention required. Corneal cross-linking is often partially covered by medical insurance when documented progression meets coverage criteria. Specialty contact lens fittings and surgical procedures have separate cost structures. For context on how Belmont Eye Center approaches pricing, visit our LASIK & PRK costs and financing page. Our team will discuss all costs and available options with you during your consultation.
Related Services at Belmont Eye Center
Keratoconus frequently coexists with or impacts other aspects of your ocular health. Explore the full range of services offered by Dr. Sandra Belmont at Belmont Eye Center:
- Corneal Procedures & Keratoconus Overview — the full spectrum of corneal care at Belmont Eye Center
- Dry Eye & Blepharitis Treatment — ocular surface conditions that commonly accompany keratoconus and must be managed prior to any corneal procedure
- Cataract Surgery — for keratoconus patients who later develop lens clouding affecting their vision
- Glaucoma Treatment — elevated eye pressure monitoring is particularly relevant for patients using corticosteroid drops post-cross-linking
- LASIK Eye Surgery — for patients with post-cross-linking stable corneas who may qualify for refractive correction
- <a href=”https://
