SURGICAL TREATMENT

The retrobulbar and facial anesthesia is given

Pupil is miosed preoperatively

Stay suture is applied to superior cornea

conjunctival peritomy is done with limbas base or fornix base flap

episcleral tissue is cauterized 

mitomycin C is applied

a scleral  flap is created with 50% thickness and is reflected untill clear cornea is seen

a block of scleral tissue is removed

Iridectomy is done to prevent block of fistula by iris

scleral flap is sutured back with 10/0 nylon

conjuntiva is stitched back with 10/0 nylon

Conjunctival stitch is removed after a week

balanced salt solution is injected to deepen the Anterior chamber and to check the patency of fistula