Which are the symptoms of Keratoconus?

TL;DR: Keratoconus is a progressive eye condition where the cornea thins and gradually bulges into a cone shape, leading to symptoms like blurred vision, increased light sensitivity, and frequent changes in eyeglass prescriptions. While symptoms often begin in late puberty or early adulthood, the severity of Keratoconus varies significantly between individuals, with many patients experiencing a stabilization of the condition by their mid-30s.

What are the most common symptoms of Keratoconus?

In the early stages of Keratoconus, many patients report mild vision changes that mimic common refractive errors. As the corneal structure alters, the most characteristic symptoms include persistent blurred or distorted vision, even with corrective lenses. Patients often describe a "ghosting" effect or halos around lights, particularly when driving at night. Because the cornea becomes irregular in shape, light does not focus correctly on the retina, resulting in high levels of astigmatism that are difficult to correct with standard glasses. Currently, 724 people with Keratoconus have joined the DiseaseMaps community, frequently reporting that the need for constant updates to their eyeglass prescription is one of the most frustrating early indicators of the disease.

What are the early warning signs to watch for?

Early identification of Keratoconus is vital for timely intervention. You should pay close attention to the following indicators:

• Frequent prescription updates: Needing new glasses or contact lenses every few months due to rapidly changing vision.


• Increased sensitivity to light (photophobia): Finding bright lights, especially sunlight or oncoming car headlights, increasingly uncomfortable.


• "Ghost" images: Seeing multiple images of a single object, often described as a shadow or a double image.


• Difficulty with night driving: Experiencing significant glare and starburst patterns around streetlights or traffic signals.


• Eye rubbing: A habitual tendency to rub the eyes, which is strongly associated with the progression of Keratoconus.

How does Keratoconus affect daily quality of life?

The impact of Keratoconus on daily life is highly individual. For some, the condition remains mild and manageable with specialized contact lenses. For others, the progressive distortion of vision can significantly interfere with reading, computer work, and driving. The psychological burden of living with a fluctuating visual impairment is significant, often leading to anxiety regarding the future of one's eyesight. Because Keratoconus typically affects both eyes, though often at different rates, the cumulative effect on spatial awareness and depth perception can be challenging.

When should you seek immediate medical attention?

While Keratoconus is typically a slowly progressive condition, there is a rare, acute complication known as "corneal hydrops." If you experience a sudden, dramatic decrease in vision accompanied by significant pain, redness, or swelling in the eye, seek an emergency consultation with an ophthalmologist or a corneal specialist immediately. This occurs when the inner layer of the cornea cracks, allowing fluid to enter, and requires prompt medical management to prevent long-term scarring.

How does the disease progress over time?

The progression of Keratoconus is most active during the second and third decades of life. For the majority of patients, the corneal thinning slows down and eventually stabilizes as they reach their mid-30s. However, the degree of visual distortion can remain even after the disease stops progressing, necessitating long-term management through rigid gas-permeable lenses, scleral lenses, or surgical interventions like corneal cross-linking, which aims to stiffen the corneal tissue.

Next steps

• Schedule a comprehensive eye exam with an optometrist or ophthalmologist who specializes in corneal diseases.


• Inquire about corneal topography, the gold-standard diagnostic tool for mapping the surface of the eye to detect Keratoconus.


• Avoid rubbing your eyes, as this mechanical stress can worsen the corneal thinning.


• Join the DiseaseMaps community to connect with others sharing their experiences with Keratoconus treatments and coping strategies.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

References

• National Eye Institute (NEI) - Facts About Keratoconus


• NIH Genetic and Rare Diseases Information Center (GARD)


• Orphanet: The portal for rare diseases and orphan drugs


• National Keratoconus Foundation (NKCF)