Anterior segment reconstruction

Anterior segment reconstruction is mainly for: 1. Infectious keratitis involving the whole cornea or part of the sclera is difficult to perform conventional corneal transplantation. 2. Whole corneal adhesion leukoplakia, old ocular trauma involving iris lens. 3. Whole corneal staphyloma. Treatment of diseases: corneal staphyloma corneal squamous cell carcinoma Indication 1. Infectious keratitis involving the whole cornea or part of the sclera is difficult to perform conventional corneal transplantation. 2. Whole corneal adhesion leukoplakia, old ocular trauma involving iris lens. 3. Whole corneal staphyloma. Preoperative preparation 1. The patient has 0.3% norfloxacin eye drops 1 to 2 days before surgery. 2. 0.25% ecsigmine eye ointment on the night before surgery, or 1% pilocarpine eye drops 2 times before surgery. 3. Infectious keratopathy as a pathogen test (smear test + culture). 4. Chemical burns were examined for tear film rupture time and tear secretion test. 5. Wear through the injury to do b-ultrasound or x-ray film. 6. One hour before surgery, 0.5 g of acetazolamide and 5 mg of diazepam, and 20% of mannitol (4 ml/kg) in children. Surgical procedure 1. Cut the conjunctiva along the limbus, expose the sclera, and sew the fleiringa ring. 2. Cut the eyeball horizontally at the position of the near schlemm tube, and cut off the whole cornea. You can also cut the entire scleral lamellar layer 4~5mm after the limbus, separate the limbus, and then cut the cornea along the schlemm. 3. If there is pre-iris mucosa, depending on the situation, separation or excision, lens opacity can be used for cataract surgery, such as iris complete, generally for iris pericarp. 4. Take a full thickness cornea for the 4-5 mm scleral flap of the eye band. Placed on the implant bed, 10-0 nylon line interrupted suture of the cornea and scleral flap.