Keratoconus is a progressive eye condition that changes the shape and thickness of the cornea. The cornea is the clear, dome-shaped front surface of the eye. In keratoconus, it thins and bulges outward into a cone shape. Understanding what increases your risk can help with early detection and better outcomes.
Knowing your personal risk factors allows you and your eye doctor to monitor your corneal health more closely. Early detection opens up more treatment options and can help preserve your vision before significant changes occur.
If a close family member has keratoconus, your chances of developing it are higher than average. Research suggests that about 10 to 15 percent of keratoconus cases have a family connection. Parents, siblings, and children of someone with keratoconus should have regular eye exams. Early screening can catch subtle corneal changes before they affect vision.
Certain genetic conditions affect the body's connective tissue, including the cornea. People with Ehlers-Danlos syndrome, Marfan syndrome, or Down syndrome have a greater risk of developing keratoconus. The structural differences in connective tissue can make the cornea less resilient over time. If you have one of these conditions, your eye doctor may recommend more frequent corneal evaluations.
Some studies suggest that keratoconus may be more common in certain ethnic groups. People of South Asian, Middle Eastern, and African descent may have higher rates of keratoconus compared to other populations. However, keratoconus affects people of all backgrounds, and anyone with risk factors should be monitored regardless of ethnicity.
Frequent and vigorous eye rubbing is one of the most significant controllable risk factors for keratoconus. The repeated mechanical stress can weaken corneal tissue over time. Eye rubbing is often linked to allergies, dry eyes, or general eye discomfort. Addressing the underlying cause of the urge to rub is important for protecting corneal health.
Many people rub their eyes without realizing how often they do it. This habit is especially common after waking up, during allergy season, or when spending long hours looking at screens. If you catch yourself rubbing your eyes frequently, talk to your eye doctor about ways to reduce the habit and treat the underlying irritation.
Environmental allergies that cause chronic eye irritation may contribute to keratoconus development. Ongoing inflammation can weaken the cornea over time. Managing allergies effectively helps reduce both the inflammation and the urge to rub your eyes. Treatment options include:
How you sleep may affect your corneal health. Sleeping face down or pressing your eye against a pillow can put pressure on the cornea over time. Some research suggests this repeated pressure might contribute to corneal changes in people who are already at risk. If you have a family history of keratoconus, sleeping on your back or using a contoured pillow may help reduce pressure on your eyes.
Keratoconus most commonly begins during puberty, typically in the teenage years. Hormonal changes during this period may affect the structure and stability of the cornea. Parents should be aware of any vision changes their children report during these years. Symptoms like blurry vision, light sensitivity, or trouble seeing at night should prompt a visit to the eye doctor.
The condition often continues to progress into the mid-30s before stabilizing in many cases. Young adults diagnosed with keratoconus need regular monitoring to track any changes. Early detection allows for treatments that may help slow progression before significant vision loss occurs.
For most people, keratoconus progression slows or stops by the late 30s or early 40s. Once the cornea stabilizes, vision often remains consistent. However, the damage from earlier progression remains, which is why early intervention is so valuable. People diagnosed later in life may find their condition is already stable and easier to manage with corrective lenses.
People with atopic conditions like eczema, asthma, or hay fever appear to have higher rates of keratoconus. These conditions share a connection to inflammation and immune system activity. The combination of chronic inflammation and the eye rubbing that often accompanies these conditions may increase risk. Managing atopic conditions well can help protect your overall eye health.
Some research has found a possible link between obstructive sleep apnea and keratoconus. The connection is not fully understood, but it may relate to changes in eye pressure during sleep or increased eye rubbing due to poor sleep quality. If you have sleep apnea and other risk factors for keratoconus, mention this to your eye doctor.
Some early signs of keratoconus can be subtle. Contact your eye doctor if you notice any of the following:
Modern diagnostic tools like corneal topography and the Pentacam can detect keratoconus in its earliest stages. At Insight Vision Center Optometry, fellowship-trained optometrists including Dr. Nathan Schramm, OD, FSLS, FBCLA and Dr. Thanh Mai, OD, FSLS, FIAOMC use advanced imaging to evaluate corneal health. Catching keratoconus early opens up more treatment options and can help preserve your vision.
A comprehensive keratoconus evaluation goes beyond a standard eye exam. Your eye doctor will use corneal topography to create a detailed map of your cornea's surface. The Pentacam measures corneal thickness at thousands of points and can detect thinning that is not visible during a regular exam. These tests are quick, painless, and provide valuable information about your corneal health.
There is no guaranteed way to prevent keratoconus, especially when genetic factors are involved. However, avoiding chronic eye rubbing and managing allergies effectively may help reduce your risk or slow progression if you are predisposed to the condition.
Treatment depends on how advanced the condition is. Options range from specially designed contact lenses to a procedure called corneal cross-linking that can help stabilize the cornea. Scleral lenses are often very effective for improving vision in keratoconus patients. Your eye doctor will recommend the best approach based on your specific situation.
Children with a family history of keratoconus should begin regular comprehensive eye exams by age 10 or earlier. Annual exams through our pediatric eye care services allow your eye doctor to monitor for any early corneal changes. Earlier detection means earlier intervention if needed.
Most people with keratoconus do not need a corneal transplant. With modern treatments like specialty contact lenses and corneal cross-linking, many patients maintain good functional vision. Transplants are typically reserved for advanced cases that do not respond to other treatments.
Yes, and contact lenses are often the primary treatment for keratoconus. Standard soft lenses usually do not work well, but specialty options like scleral lenses, hybrid lenses, and custom rigid lenses can provide excellent vision correction. These lenses vault over the irregular cornea and create a smooth optical surface.
Yes, keratoconus can develop in children, though it most commonly appears during the teenage years. Children who rub their eyes frequently, have allergies, or have a family history of keratoconus should have regular eye exams. Early diagnosis in children is especially important because younger patients often experience faster progression.
