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What Causes Pterygium?

Understanding the underlying factors can help you make informed decisions about prevention and treatment of Pterygium

Primary Cause of Pterygium: UV Exposure

The strongest link to pterygium development is ultraviolet light exposure during childhood. The first 10 years of life appear particularly crucial, with early sun exposure significantly increasing the likelihood of pterygium developing later.

This explains why pterygium is often called a “surfer’s eye” – though it affects people from all walks of life who’ve had significant UV exposure.

Environmental Triggers:

Beyond UV light, several environmental factors contribute to pterygium formation:

Dry conditions – Insufficient eye surface moisture, common in:

  • Air-conditioned environments
  • Windy outdoor conditions
  • Low-humidity climates

Dust and irritants – Frequent exposure to:

  • Construction sites
  • Agricultural environments
  • Dusty outdoor work

Reflected UV – Amplified exposure from:

  • Water surfaces
  • Sand and concrete
  • Snow (for those in alpine areas)

The Role of Genetics

Family history plays a significant role in pterygium development. If relatives have experienced pterygium, you may have inherited factors that make your eyes more susceptible to environmental triggers.

Genetic factors can influence how your body responds to UV exposure and environmental irritation, affecting both pterygium development risk and growth patterns.

Understanding Your Risk

Pterygium typically develops from a combination of factors rather than a single cause. Your personal risk profile includes your childhood sun exposure, family history, and ongoing environmental conditions.

While you can’t change past sun exposure or genetic factors, understanding these influences helps guide effective prevention strategies and treatment decisions.

Dr Juanita Pappalardo provides comprehensive pterygium assessment, helping patients understand their individual risk factors and optimal management approach.

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