By: Johann Panthakey

15/12/2024

Keratoconus is a non-inflammatory eye condition that affects the shape and clarity of the cornea—the clear, dome-shaped front surface of the eye. In keratoconus, the cornea gradually thins and bulges outward into a cone-like shape, leading to distorted vision. The condition often begins in adolescence or early adulthood and can progress over time. 

What Is Keratoconus? 

The cornea plays a crucial role in focusing light onto the retina for clear vision. In keratoconus, structural weakness in the corneal tissue causes it to lose its normal round shape. As the cornea becomes irregular, light entering the eye is scattered rather than focused properly, resulting in blurred or distorted vision. Keratoconus usually affects both eyes, though one eye may be more severely affected than the other. 

Causes and Risk Factors 

The exact cause of keratoconus is not fully understood, but it is believed to result from a combination of genetic, environmental, and biochemical factors. Known risk factors include: 

• A family history of keratoconus 

• Frequent or vigorous eye rubbing 

• Allergic eye conditions such as hay fever 

• Connective tissue disorders (such as Marfan syndrome) 

• Poorly fitted contact lenses 

Symptoms of Keratoconus 

Symptoms typically develop gradually and may worsen as the condition progresses. Common signs include: 

• Blurred or distorted vision 

• Increased sensitivity to light and glare 

• Frequent changes in eyeglass prescriptions 

• Ghosting or multiple images 

• Difficulty seeing clearly at night 

• Eye strain or headaches 

In advanced stages, vision may become significantly impaired and difficult to correct with regular glasses. 

Diagnosis 

Keratoconus is diagnosed through a detailed eye examination. Advanced imaging tests such as corneal topography and tomography are used to map the shape and thickness of the cornea, allowing early detection and monitoring of disease progression. 

Treatment Options 

Treatment depends on the severity and progression of the condition. In early stages, glasses or soft contact lenses may improve vision. As keratoconus advances, rigid gas permeable (RGP), hybrid, or scleral contact lenses are often required to provide clearer vision. 
To slow or stop progression, corneal collagen cross-linking (CXL) may be recommended. In severe cases where vision cannot be corrected with lenses, corneal transplant surgery may be necessary. 

Managing and Preventing Progression 

Although keratoconus cannot be prevented, progression may be reduced by avoiding eye rubbing, managing allergies, and attending regular eye check-ups—especially for individuals at higher risk. 

Conclusion 

Keratoconus is a progressive eye condition that can significantly affect vision if left untreated. Early diagnosis and appropriate management can preserve vision and improve quality of life. Regular eye examinations and timely intervention are essential for long-term eye health. 

Author: Johann Panthakey