Many times, a pterygium does not cause symptoms. However, an inflamed or enlarged pterygium may cause redness and inflammation.
A pterygium can grow onto the cornea (the clear, outer layer of the eye). This can distort the shape of the cornea, causing a condition called astigmatism.
Symptoms of pterygium may include:
- Gritty feeling
- Sensation of a foreign body in the eye
- Blurred vision
Causes of Pterygium: Significant risk factors include:
- Prolonged exposure to UV light
- Dry eye
- Irritants such as dust and wind
- Lubricating eyedrops or ointments, such as Blink or Refresh drops
- Occasional use of vasoconstrictor eyedrops, such as Naphcon A
- Short course of steroid eyedrops, such as FML or Lotemax