CYSTS OF CONJUNCTIVA

The common cystic lesions of the conjunctiva are:

1. Congenital cystic lesions. These are of rare occurrence and include congenital corneoscleral cyst and cystic form of epibulbar dermoid.

2. Lymphatic cysts of conjunctiva. These are common and usually occur due to dilatation of lymph spaces in the bulbar conjunctiva. Lymphangiectasis is characterized by a row of small cysts. Rarely, lymphangioma may occur as
a single multilocular cyst.

3. Retention cysts. These occur occasionally due to

Pterygium Treatment.

Treatment. Surgical excision is the only satisfactory
treatment, which may be indicated for: (1) cosmetic
reasons, (2) continued progression threatening to
encroach onto the pupillary area (once the pterygium
has encroached pupillary area, wait till it crosses on
the other side), (3) diplopia due to

PTERYGIUM

Pterygium (L. Pterygion = a wing) is a wing-shaped fold of conjunctiva encroaching upon the cornea from either side within the interpalpebral fissure.
Etiology. Etiology of pterygium is not definitely known. But the disease is more common in people living in hot climates. Therefore, the most accepted
view is that it is a response to prolonged effect of environmental factors such as exposure to sun (ultraviolet rays), dry heat, high wind and abundance of dust.

Pathology. Pathologically pterygium is a degenerative and hyperplastic condition of conjunctiva. The subconjunctival tissue undergoes elastotic degeneration and