For years, Golden State Warriors star Steph Curry was knocking down historic three-pointers through a literal haze. It wasn’t until former general manager Bob Myers noticed Curry squinting through games that the guard finally saw an eye specialist. The diagnosis: keratoconus, a progressive eye disease that causes the clear front surface of the eye (the cornea) to thin and bulge into an irregular cone shape.

The condition turns everyday sight into a minefield of glare, nighttime halos and blurry distortion. Yet, like many people who gradually develop vision issues, Curry had simply adapted to the blur, assuming it was normal.

While Curry’s vision was corrected with custom scleral contact lenses – and newer therapies like corneal cross-linking can halt the disease’s progression – his story underscores a critical public health gap. Regular comprehensive exams aren’t just about updating a glasses prescription; they are vital tools for catching progressive conditions before permanent corneal scarring sets in. For Black communities, where routine eye care is often delayed due to systemic access barriers, catching the squint early is the difference between manageable corrective wear and invasive surgery.

Which celebrities have keratoconus?

Steph Curry is among several American public figures who have been reported as living with keratoconus. Examples include actor Mandy Patinkin, baseball player Tommy Pham, former NFL defensive tackle Brandon Williams and Olympic bobsledder Steven Holcomb. Curry’s story is notable because he played elite basketball while unknowingly adapting to distorted vision.

As he explained in a Forbes interview, Curry learned about keratoconus after being asked why he was squinting so much. “I learned about keratoconus pretty quickly and about [the] irregular shape of my cornea and just how distorted my vision really was,” the athlete said.

“And there was a need for us to follow up testing every six months to make sure that it didn’t progress because it is an eye- or a sight-threatening condition.” Curry described the diagnosis as eye-opening because he realized his vision had deteriorated without him noticing. His experience shows that high performance does not necessarily mean normal eyesight.

What is keratoconus?

If your new glasses seem to stop working every few months, or if night driving suddenly comes with blinding halos around every headlight, your eyes might be trying to tell you something deeper than standard screen fatigue.

That subtle, shifting blur can sometimes point to keratoconus – a progressive eye condition that quietly reshapes how you see the world. The National Eye Institute explains that, instead of maintaining a smooth, rounded dome, the cornea gradually thins at its center and bulges outward into a slight cone. Because the cornea focuses light directly onto the retina, this structural change scatters light, causing astigmatism, glare and distorted vision.

What makes keratoconus tricky is its timing. It typically surfaces during late adolescence or early adulthood – a stage of life when many of us brush off blurred vision as tired eyes or assume we just need a slightly stronger pair of frames. But because the cornea’s shape is physically changing, standard glasses and soft contacts eventually lose their ability to correct the blur.

The Mayo Clinic notes that catching it early makes all the difference: comprehensive scans can spot the thinning long before major vision loss sets in, opening the door to specialized treatments and rigid lenses that protect your sight for the long haul.

What’s happening in your body

In a healthy eye, the cornea acts like a smooth, clear dome that bends light into a sharp, predictable focal point. With keratoconus, structural thinning weakens that dome, causing it to bulge outward into an irregular cone. Light no longer lands cleanly; instead, it scatters. The world through a keratoconic cornea looks like shooting through a smudged, warped camera lens – headlights burst into blinding halos, street signs double and sharp text stretches at the edges.

Because this distortion creeps in gradually, the brain adapts before the person realizes anything is wrong. You might catch yourself leaning six inches closer to your laptop, dreading the glare of nighttime highway drives or chalking up constant squinting to fatigue.

That subtle compensation is precisely what masked Steph Curry’s condition during his early NBA dominance. Like many dealing with undiagnosed keratoconus, Curry simply adapted his game around the blur until someone pointed out his relentless squinting.

Causes of keratoconus

While there isn’t a single switch that triggers keratoconus, researchers view it as a collision between genetic predisposition and physical stress. About one in 10 people with the condition has a parent who lives with it, but genetics rarely tell the whole story. Instead, MedlinePlus Genetics explains that inherited biology often creates an underlying vulnerability – and everyday habits can push it over the edge.

Chief among those habits is chronic, vigorous eye-rubbing. When seasonal allergies flare or screen fatigue sets in, grinding your knuckles into your eyes might bring fleeting relief, but that repetitive friction can inflict real micro-trauma on fragile corneal tissue. Over time, constant rubbing breaks down the eye’s structural collagen fibers, accelerating corneal thinning. This is why individuals managing chronic eczema, asthma or severe eye allergies face an elevated risk.

Other underlying conditions that affect connective tissue and collagen strength – such as Marfan or Ehlers-Danlos syndromes – can also leave the cornea less resilient to everyday strain.

Having a family history doesn’t make keratoconus inevitable, but it does change the playbook. If corneal irregularity runs in your family, skipping routine eye exams isn’t an option; getting baseline corneal topography in your teens or twenties can catch microscopic thinning long before it starts warping how you see.

Health risks and complications

If left unchecked, keratoconus doesn’t just make your vision blurry – it fundamentally alters how you navigate the world. As the cornea continues to thin and stretch out of shape, standard glasses and soft contact lenses lose their grip on optical clarity. Simple daily routines begin to feel like high-friction hurdles: spreadsheets blur into dizzying ghost images, fluorescent office lighting triggers chronic headaches and nighttime driving becomes treacherous as streetlights bleed into blinding glare.

MedlinePlus notes that, in advanced, untreated cases, excessive stretching can lead to corneal scarring. In rare instances, acute breaks in the cornea’s inner lining can cause sudden fluid leakage – a painful complication known as corneal hydrops. Decades ago, severe thinning left patients with very few paths forward other than an invasive corneal transplant.

What to do about keratoconus

Treatment depends on whether keratoconus is stable or progressing and its effect on vision. The Mayo Clinic confirms that early or mild disease may be managed with eyeglasses or soft contact lenses. As the cornea becomes more irregular, rigid gas-permeable or scleral lenses can provide clearer vision by creating a smoother optical surface. These lenses improve vision but do not stop the underlying disease. 

For progressive keratoconus, the American Academy of Ophthalmology recommends that corneal collagen cross-linking may strengthen the cornea and slow or halt further deterioration. The procedure uses riboflavin (vitamin B2) and ultraviolet light to create collagen bonds. More advanced cases with significant scarring, extreme thinning or poor vision despite lenses may require surgery, including intracorneal ring segments or a corneal transplant. Treatment should be individualized based on corneal shape, thickness and progression.

Dr. Diana Rangaves, Pharm.D., suggests additional measures. “Adding protective eyewear to your routine supports long-term eye health and vision,” she says. “When we think of eye protection, we often focus on immediate concerns such as accidents, eye strain, or glare from the sun. But the reality is that wearing protective glasses regularly can be transformative in maintaining long-term eye health and preserving our vision. The impact of environmental factors, such as exposure to harmful UV rays, dust and digital strain, cannot be overstated.”

How did Steph Curry fix his keratoconus?

When basketball fans ask how Steph Curry “fixed” his keratoconus, the real answer is that he didn’t – at least not in the sense of a one-time cure. Instead, the NBA sharpshooter manages the progressive corneal disorder through precision technology and ongoing vigilance, transforming a sight-threatening condition into a masterclass in modern eye care.

The cornerstone of Curry’s optical turnaround was scleral lenses. Unlike standard soft contacts that drape directly over the eye – taking on the exact warped contour of an irregular cornea – scleral lenses are custom-molded, rigid devices that vault completely over the cornea, resting on the durable white tissue (the sclera) of the eye. By trapping a cushion of clear saline between the device and the eye, the lens essentially replaces the damaged corneal surface with an artificial, perfectly rounded dome, allowing light to focus cleanly on the retina.

Finding that precision fit took trial and error, but the relief was immediate both on and off the court. “I could actually see clearly and stop squinting, stop having those weird little headaches that would come, that I didn’t associate with my vision,” Curry told Forbes.

That headache connection is critical: for years, Curry’s brain and facial muscles had been working overtime, unconsciously straining to resolve blurry visual data. Once his sight was corrected, the chronic ocular fatigue vanished. But clear vision doesn’t mean the work is done. Because keratoconus is a progressive condition, Curry undergoes specialized corneal evaluations twice a year to ensure his corneas aren’t thinning further. If thinning resumes, interventions such as corneal cross-linking (CXL) can be used to halt the disease before it causes irreversible scarring.

When to see a doctor

See an eye doctor if your vision becomes blurry, distorted or unusually sensitive to light, especially if your prescription keeps changing. Mayo Clinic recommends evaluation when eyesight worsens rapidly, while MedlinePlus advises assessment when vision cannot be adequately corrected with glasses. An eye specialist can perform refraction, slit-lamp examination and corneal measurements. Corneal topography or tomography can create a detailed map of the cornea and may identify early disease that is not apparent on routine examination.

People with a family history should mention it during eye visits, particularly when children or teenagers develop unexplained vision changes. Avoid vigorous eye rubbing, and seek guidance for persistent allergies or itching. Early evaluation can help distinguish keratoconus from routine refractive problems and identify treatment before substantial corneal damage occurs.

Bottom line

Steph Curry’s keratoconus story is a reminder that vision problems can become so familiar that people stop noticing them. Keratoconus can progress, but diagnosis, specialized lenses, monitoring and treatments such as cross-linking can protect useful vision. Regular eye care matters, especially when symptoms change or a family history raises concern.

Frequently Asked Questions

Can you go fully blind with keratoconus? 

Complete blindness is uncommon, but advanced keratoconus can cause severe, irreversible vision loss without appropriate treatment.

Which vitamin is good for keratoconus? 

Riboflavin (vitamin B2) is used during corneal cross-linking, but no vitamin supplement has been proven to cure keratoconus.

Citations

Lee B. Warriors’ Steph Curry Discusses His Eye Condition, Keratoconus. Forbes. Published September 23, 2026. https://www.forbes.com/sites/brucelee/2026/09/23/warriors-steph-curry-discusses-his-eye-condition-keratoconus/

National Eye Institute. Corneal Dystrophies. National Eye Institute. https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/corneal-conditions/corneal-dystrophies

Mayo Clinic. Keratoconus — Symptoms and causes. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/keratoconus/symptoms-causes/syc-20351352

Mayo Clinic. Keratoconus — Diagnosis and treatment. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/keratoconus/diagnosis-treatment/drc-20351357

MedlinePlus Genetics. Keratoconus. MedlinePlus. https://medlineplus.gov/genetics/condition/keratoconus/

MedlinePlus Medical Encyclopedia. Keratoconus. MedlinePlus. https://www.medlineplus.gov/ency/article/001013.htm

Porter D. Corneal Cross-Linking. American Academy of Ophthalmology. Published December 2, 2025. https://www.aao.org/eye-health/treatments/corneal-cross-linking-2

American Academy of Ophthalmology EyeWiki. Photo Activated Chromophore for Keratitis-Corneal Cross-linking. EyeWiki. https://eyewiki.aao.org/Photo_Activated_Chromophore_for_Keratitis-Corneal_Cross-linking