What is it?

What exactly is pterygium?

The pterygium (pterygium) is a triangular layer of fibrovascular tissue, which penetrates into the cornea (abnormal tissue growth). It usually occurs on the inner corner of the eye (nasal) and prevents vision (like a foreign body sensation) covering the white (hard) layer of tissue of the eye. It grows slowly and when grown, except its unsightly side, is can also create vision problems (e.g. astigmatism).

pterygium1   pterygium2

Main causes

What are the main causes?

The causes of the pterygium have not been fully ascertained. However this degenerative lesion of the conjunctiva is mainly due to increased exposure to sunlight (ultraviolet radiation), drought and dust.

pterygium3   pterygium4


The main symptoms are:

  • foreign body sensation and discomfort
  • redness
  • itching
  • astigmatism
  • coating of the optical axis (in an advanced stage)
  • corneal deformations (in an advanced stage)
pterygium5   pterygium6



The pterygium is treated as follows:

  • locally: using special eye drops and ointments (treating the inflammation)
  • surgery: surgical removal is indicated either for cosmetic reasons (if the pterygium is large, extended or causes deformity), or in cases where the optical axis is threatened with impairment of vision

pterygium7   pterygium8

It noted that despite proper surgical removal, the pterygium is feasible to recur mainly to young people. To prevent possible relapses surface radiotherapy or medication is applied.