limbal conjunctivotomy

The purpose of the operation is to cut off the neovascularization from the conjunctival vessels at the limbus to the superficial corneal layer, and promote the atrophy of the trachoma corneal vasospasm and prevent it from proceeding to the center of the cornea. This procedure is sometimes used as a preoperative preparation for keratoplasty to prevent the blood vessels in the limbus from growing into the graft and causing rejection of the graft. Simply cutting off the blood vessels, including surface diathermy coagulation, 3mm migration of the conjunctiva is not enough, because the collateral circulation can be re-established quickly, so the limbal conjunctival resection is better than the incision. Treatment of diseases: mooring corneal ulcer Indication Limbal bulbar conjunctival surgery is applicable to: 1. Trachoma vasospasm. 2. Preoperative preparation of corneal transplantation. 3. Treatment of mooring corneal ulcers. Surgical procedure 1. Use a pair of scissors to make a conjunctival incision parallel to the limbus at a distance of 3 mm from the limbus. The length is 1/4 to 1/2 of the circumference of the cornea and reaches the sclera. 2. Close to the limbus and make a conjunctival incision parallel to the first incision and the same length, so that the blood vessel entering the superficial cornea is cut off, and the 3 mm wide bulbar conjunctiva is cut off the scleral surface. 3. The scleral surface is inserted into the superficial vascular end of the cornea and its branches are cauterized. The free edge of the bulbar conjunctiva was fixed with a 7-0 silk thread on the superficial sclera at 3 to 4 mm from the margin.