Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
Keratoconus is a corneal condition where the normally round cornea thins and bulges into a cone shape, causing irregular astigmatism and nearsightedness. Vision becomes blurred and distorted, and light sensitivity is common. The condition usually involves both eyes, often starting in the late teens to early thirties, and may progress for years.
read more about keratoconus ...People often describe ghosting or double images in one eye, halos and glare around lights, and distortion where straight lines appear wavy. As irregular astigmatism increases, glasses stop providing clear focus and contrast drops, especially at night.
Early on, soft contacts or updated glasses may help. As disease advances, rigid gas-permeable or scleral lenses are used to vault over the misshapen cornea and create a smooth optical surface, improving clarity for reading and driving.
The exact cause involves multiple factors. Genetics play a role, with family history present in some patients. Eye rubbing and allergies are associated and may accelerate weakening of the corneal structure. Hormonal and environmental factors also contribute.
Keratoconus is more common in people with Down syndrome or connective tissue disorders. It can appear or progress faster in younger patients, which is why screening and follow-up are emphasized in teens and young adults who report frequent prescription changes.
Symptoms include gradually worsening blurred or distorted vision, increased light sensitivity, and frequent changes in glasses prescriptions. Night driving often becomes difficult because of halos and starbursts.
A sudden drop in vision with corneal swelling can occur when a tiny tear forms in the inner corneal layer, a complication called acute hydrops. Advanced disease can scar the cornea, further reducing clarity even with contact lenses.
Keratoconus can reshape the cornea enough to reduce visual function at school, work, and while driving. It may progress for years, and contact lens intolerance or scarring limits options if monitoring and treatment are delayed. People with frequent prescription changes, strong astigmatism, or symptoms like halos and monocular double images should be checked promptly.
The outlook is encouraging when care starts early. Modern scleral lenses often restore clear vision, and cross-linking can stabilize progressive disease and reduce the chance of needing a transplant. Regular follow-up that reinforces avoiding eye rubbing, manages allergies, and schedules periodic imaging helps patients preserve sight and independence.
References
Mayo Clinic. Keratoconus: Symptoms and causes. https://www.mayoclinic.org/diseases-conditions/keratoconus/symptoms-causes/syc-20351352
Mayo Clinic. Keratoconus: Diagnosis and treatment. https://www.mayoclinic.org/diseases-conditions/keratoconus/diagnosis-treatment/drc-20351357
Cleveland Clinic. Keratoconus: Symptoms, Causes & Treatment. https://my.clevelandclinic.org/health/diseases/14415-keratoconus
American Academy of Ophthalmology. What Is Keratoconus. https://www.aao.org/eye-health/diseases/what-is-keratoconus
FDA. Photrexa/KXL corneal collagen cross linking approval summary. https://www.accessdata.fda.gov/drugsatfda_docs/nda/2016/203324orig2s000sumr.pdf
AAO. Corneal Cross Linking. https://www.aao.org/eye-health/treatments/corneal-cross-linking-2
Ophthalmology. Natural history and risk factors for progression in keratoconus. https://www.aaojournal.org/article/S0161-6420(18)33287-1/abstract
"
Diagnosis uses slit lamp examination plus corneal topography or imaging to map curvature and elevation, and thickness measurement to document thinning. These tests distinguish keratoconus from other corneal conditions and guide decisions about contact lenses or surgery.
Treatment is tailored to severity. Glasses or soft lenses help in early stages. Many patients move to rigid gas-permeable, hybrid, or scleral lenses for better vision. Corneal collagen cross-linking, approved in the United States to treat progressive keratoconus, strengthens the cornea to slow or stop worsening. Intracorneal ring segments may improve corneal shape in selected cases. When scarring or thinning limits vision or lens wear, partial or full corneal transplant is considered.
Yes. It can significantly affect daily vision and, without timely care, may scar or require corneal surgery, though many people do well with modern lenses and cross-linking.
Glasses help in early stages. As irregular astigmatism increases, specialized rigid or scleral contact lenses provide clearer vision by creating a smooth refracting surface.
Most cases are detected in the late teens or twenties, though onset can range from childhood to later adulthood. Earlier onset is linked with faster progression.