Pterygium is most strongly associated with excessive exposure
to the sun's ultraviolet light.
If a Pterygium becomes inflamed and affects the cornea, excision(
Pterygium surgery) may be necessary.
For this reason surgery to remove a Pterygium is not recommended unless it is affecting vision.
Pterygium occurs as a reaction by the eyes to being exposed to wind,
dryness, dust and sunshine(solar radiation).
For this reason, surgery to remove a Pterygium is not usually recommended if it has
not begun to affect the patient's vision.
When the pineguecula grows larger and begins to involve the cornea(the transparent, lens-like structure that covers the pupil and iris),
it is called a Pterygium.
Surgery for Pterygium removal usually lasts no longer than 30 minutes, after which
you likely will need to wear an eye patch for protection for a day or two.
Some evidence in support of this
idea may be found in the fact that Pterygium is more common among island people
and among those living between latitudes 40° N and 40 ° S;
An autograft will be made from the area of the conjunctiva that lies beneath
the eyelid, and this will be used to cover the area from which the Pterygium has been removed.