Pterygium is a non-cancerous growth on the white of your eye. Experts are not sure what causes pterygium, but most believe it can be caused by prolonged exposure to UV light. Because of this, the condition is often referred to as “surfer’s eye.” Pterygium can cause itching and irritation. If left untreated, it could continue to grow, affecting the shape of your cornea and leading to astigmatism. Treatments include eye drops and ointments. If you do not respond to these more conservative methods, your doctor may recommend a quick outpatient surgery.